Dated 28 June 2004




                        CROWN CASTLE INTERNATIONAL CORP.

                                       and

                         NGG TELECOMS INVESTMENT LIMITED

                                       and

                         NATIONAL GRID HOLDINGS ONE PLC

                            SHARE PURCHASE AGREEMENT

   relating to the sale and purchase of the whole of the issued share capital
                       of Crown Castle UK Holdings Limited



[Linklaters Logo]

One Silk Street
London EC2Y 8HQ

Telephone (44-20) 7456 2000
Facsimile (44-20) 7456 2222

Ref Roger Barron/Joanna Healey




                                Table of Contents


Contents                                                                       Page

                                                                         
1    Interpretation .......................................................      1


2    Agreement to Sell the Shares .........................................     15


3    Consideration ........................................................     15


4    Conditions ...........................................................     16


5    Pre-Closing ..........................................................     18


6    Closing ..............................................................     21


7    Post-Closing Adjustments .............................................     22


8    Warranties ...........................................................     25


9    Limitation of Liability ..............................................     27


10    Claims ..............................................................     32


11    Restrictions on the Seller ..........................................     32


12    Confidentiality .....................................................     34


13    Other Provisions ....................................................     35


14    Tax Indemnity .......................................................     45


15    Tax Returns etc. ....................................................     53


16    Environmental Indemnity .............................................     55


17    Repayment of Intra-Group balances ...................................     60


18    Guarantee by the Guarantor ..........................................     60


Schedule 1 The Company and the Subsidiaries ...............................     64


Schedule 2 Retained Names and Marks (Clause 13.2) .........................     69


Schedule 3 Closing Obligations (Clause 6) .................................     74


Schedule 4 Determination of Closing Date Balance Sheet and
  Completion Statements (Clause 7) Part 1 .................................     77



                                       i







                                                                             
Schedule 4 Part 2 March Balance Sheet (Clause 1.1) ........................     79


Schedule 4 Part 3  Base Working Capital Amount (Clause 1.1) ...............     81


Schedule 4 Part 4 Estimated Cash Deferred Income Amount (Clause 1.1) ......     84


Schedule 4 Part 5 Illustration of Post-Closing
  Adjustment Mechanisms (Clause 7.5) ......................................     85


Closing and Completion Adjustment Summary .................................     85


Schedule 4 Part 6 Specific Accounting Policies ............................     86


Schedule 5 Warranties given by the Seller .................................     87


Schedule 6  Warranties given by the Purchaser .............................    111


Schedule 7  Warranties given by the Guarantor .............................    114


Schedule 8 Seller's Knowledge .............................................    115


Schedule 9 Transitional Services Agreement ................................    116


Table of Contents .........................................................     i


                                       ii




                            Share Purchase Agreement

This Agreement is made on 28 June 2004

between:

(1)      Crown Castle International Corp, a company incorporated under the laws
         of Delaware whose registered office is at 510 Bering Drive, Suite 500,
         Houston, Texas 77057 (the "Seller");

(2)      NGG Telecoms Investment Limited, a company incorporated in England and
         Wales with registered number 3696564 whose registered office is at 1-3
         The Strand, London WC2N 5EH (the "Purchaser"); and

(3)      National Grid Holdings One plc, a company incorporated in England and
         Wales with registered number 2367004 whose registered office is at 1-3
         The Strand, London WC2N 5EH (the "Guarantor").

Whereas:

(A)      The Seller has agreed to sell or procure to be sold the Shares (as
         defined below) and to assume the obligations imposed on the Seller
         under this Agreement;

(B)      The Purchaser has agreed to purchase the Shares and to assume the
         obligations imposed on the Purchaser under this Agreement; and

(C)      The Guarantor has agreed to guarantee the Purchaser's obligations under
         this Agreement.

It is agreed as follows:

1        Interpretation

         In this Agreement, unless the context otherwise requires, the
         provisions in this Clause 1 apply:

1.1      Definitions

         "Accounting Policies" means the accounting policies and procedures of
         the Group Companies as set out in Part 1 of Schedule 4;

         "Accounts" has the meaning given to it in paragraph 2.1 of Schedule 5;

         "Accounting Firm" has the meaning given to it in paragraph 2.4 of Part
         1 of Schedule 4;

         "Accounts Date" means 31 March 2004;

         "Actual Tax Written Down Value" means the Tax Written Down Value of the
         assets of any Group Company which constitute Plant and Machinery which
         are not Long Life Assets as of 31 December 2003 on the assumption that
         an accounting period of each Group Company ends on Closing;

         "ADR Notice" has the meaning given to it in Clause 13.21.2;

         "Affiliate" means, with respect to any person, any other person
         directly or indirectly, through one or more intermediaries,
         controlling, controlled by or under common control with such first
         person from time to time;


                                       1



         "Agreed Terms" means, in relation to a document, such document in the
         terms agreed between the Seller and the Purchaser and signed for
         identification by the Purchaser and the Seller with such alterations as
         may be agreed in writing between the Seller and the Purchaser from time
         to time;

         "Agreement" means this Share Purchase Agreement;

         "Ancillary Agreements" means any ancillary agreements with utility
         providers (including providers of power and water), any agreements for
         grazing or mowing affecting any undeveloped part or parts of any real
         property described in paragraph 4.1 of Schedule 5 and any other similar
         non-material agreements granting occasional rights, including rights of
         way over any such undeveloped part or parts of the surface area of such
         real property;

         "appropriate representatives" has the meaning given to it in paragraph
         7.1 of Schedule 5;

         "Asbestos" means all or any of the following naturally occurring
         minerals: chrysotile, crocidolite, amosite, anthophyllite, tremolite
         and actinolite and includes materials containing any of those minerals;

         "Asbestos Regulations" means the Control of Asbestos at Work
         Regulations 2002 as in force as at the date of this Agreement;

         "Base Working Capital Amount" means (pound)(7,434,000) (negative seven
         million, four hundred and thirty four thousand pounds Sterling), being
         the amount equal to (x) Base Working Capital Assets minus (y) Base
         Working Capital Liabilities, as set out on the March Balance Sheet and
         the Base Working Capital Schedule;

         "Base Working Capital Assets" means the aggregate of receivables
         (excluding receivables included within deferred income and VAT on such
         receivables within deferred income), prepayments (excluding FASB Asset
         and amounts corresponding to the line items "Other Debtors DLA" and
         "Escrow Ac-Esat"), inventories and work-in-progress as set out on the
         March Balance Sheet and the Base Working Capital Schedule (it being
         understood that Base Working Capital Assets shall not include Cash
         Balances or amounts included in Intra-Group Indebtedness);

         "Base Working Capital Liabilities" means the aggregate of payables,
         accrued liabilities (excluding FASB Liability), corporation tax and
         provisions falling due within 12 months as set out on the March Balance
         Sheet and the Base Working Capital Schedule (it being understood that
         Base Working Capital Liabilities shall not include deferred income or
         amounts included in Intra-Group Indebtedness);

         "Base Working Capital Schedule" means the calculation of the Base
         Working Capital Amount set out in Part 3 of Schedule 4;

         "BBC" means The British Broadcasting Corporation, a corporation
         incorporated by Royal Charter (Company No.: RC000057);

         "BBC Analogue Transmission Agreement" means the agreement between the
         Company and the BBC dated 27 February 1997;

         "BBC DAB Service Agreement" means the agreement between the Company and
         the BBC dated 24 March 2003;


                                       2



         "BBC Mux B DTT Transmission Agreement" means the agreement between the
         Company and the BBC dated 23 August 2002;

         "BBC Mux 1 DTT Transmission Agreement" means the agreement between the
         Company and the BBC dated 10 February 1998;

         "BBC Pension Scheme" means the BBC pension scheme established by a
         trust deed dated 23 June 1949, as amended from time to time;

         "Books and Records" means all books of account, ledgers, general,
         financial, accounting, tax documentation and personnel records, files,
         customers' and suppliers' lists, sales, advertising and promotional
         literature and customer and supplier correspondence, whether held in
         paper form or by electronic means, exclusively relating to the Group
         Companies and portions of all such types of records that primarily
         relate to the Group Companies but do not exclusively relate to the
         Group Companies;

         "Broadcasting Act" means the Broadcasting Act 1990 and the Broadcasting
         Act 1996;

         "British Isles" means the United Kingdom, the Republic of Ireland, the
         Channel Islands and the Isle of Man;

         "Budget" means the 2004 budget of the Group set out in Section 6.1 of
         the Disclosure Letter;

         "Business Day" means a day which is not a Saturday, Sunday or a public
         holiday in England or New York City;

         "Capital Allowances" means capital allowances as provided for by the
         Capital Allowances Act;

         "Capital Allowances Act" means the Capital Allowances Act 2001;

         "Cash Amount Statement" has the meaning given to it in Clause 7.2;

         "Cash Balances" means the aggregate of cash in hand or credited at a
         financial institution (including deposits repayable on demand or within
         three months of the applicable balance sheet date with any financial
         institution) as recorded in the March Balance Sheet or the Closing Date
         Balance Sheet, as applicable, less the aggregate of bank overdrafts or
         amounts debited at a financial institution as recorded in the March
         Balance Sheet or the Closing Date Balance Sheet, as applicable;

         "Cash Deferred Income" means all amounts included in the Closing Date
         Balance Sheet in respect of income which is deferred and in respect of
         which cash has been banked and cleared prior to the Closing Date. For
         the avoidance of doubt, reference is hereby made to the Cash Deferred
         Income Schedule;

         "Cash Deferred Income Amount Statement" has the meaning given to it in
         Clause 7.2;

         "Cash Deferred Income Schedule" means the hypothetical illustration of
         the Estimated Cash Deferred Income Amount set out in Part 4 of Schedule
         4;

         "CEDR" means the Centre for Effective Dispute Resolution;

         "CEDR Model Mediation Procedure" means the model mediation procedure
         edition 9A as adopted by CEDR as of February 2004;


                                       3



         "Change in Tax Law" means the coming into force after the Closing Date
         of, or any introduction or change after the Closing Date in, any Law
         (or its judicial interpretation) or published practice of any Tax
         Authority of general application (including any Inland Revenue
         Statement of Practice or Extra-statutory Concession or the Inland
         Revenue Tax Bulletin, and the Inland Revenue Manuals) or any change
         after the Closing Date in the rates of Taxes;

         "Claim" has the meaning given to it in paragraph 10.1 of Schedule 5;

         "Clawback Provision" has the meaning given to it in paragraph 12 of
         Schedule 5;

         "Closing" means the completion of the sale of the Shares pursuant to
         Clause 6;

         "Closing Amount" has the meaning given to it in Clause 3.1;

         "Closing Date" means the date on which Closing takes place;

         "Closing Date Balance Sheet" has the meaning given to it in Clause 7.1;

         "Closing Working Capital Amount" means the amount equal to (x) Closing
         Working Capital Assets minus (y) Closing Working Capital Liabilities,
         as set out on the Closing Date Balance Sheet. The Closing Working
         Capital Amount shall be expressed in Sterling;

         "Closing Working Capital Assets" means the aggregate of receivables
         (excluding receivables included within deferred income and VAT on such
         receivables within deferred income), prepayments (excluding FASB Asset
         and amounts corresponding to the line items "Other Debtors DLA" and
         "Escrow Ac-Esat"), inventories and work-in-progress as of the Closing
         Date and as set out on the Closing Date Balance Sheet (it being
         understood that Closing Working Capital Assets shall not include Cash
         Balances or amounts included in Intra-Group Indebtedness). For the
         avoidance of doubt, reference is hereby made to the Base Working
         Capital Schedule;

         "Closing Working Capital Liabilities" means the aggregate of payables,
         accrued liabilities (excluding FASB Liability), corporation tax and
         provisions falling due within 12 months as of the Closing Date and as
         set out on the Closing Date Balance Sheet (it being understood that
         Closing Working Capital Liabilities shall not include deferred income
         or amounts included in Intra-Group Indebtedness (noting that the
         accrued liabilities in respect of amounts paid to Powergen shall be
         zero on the understanding that any liability due to Powergen shall be
         settled in full on or prior to Closing)). For the avoidance of doubt,
         reference is hereby made to the Base Working Capital Schedule;

         "Communications Act" means the Communications Act 2003;

         "Companies Act" means the Companies Act 1985;

         "Company" means Crown Castle UK Holdings Limited, details of which are
         set out in Schedule 1;

         "Company Change of Control" means the direct or indirect acquisition by
         a Direct Competitor (including an Affiliate) at any time after the
         Closing Date, whether by sale, merger, operation of Law or otherwise,
         of (i) control of the Group or (ii) a material portion of the assets of
         the Group immediately prior to the Closing;


                                       4



         "Competition Commission" means the Competition Commission as
         established by the Competition Act 1998;

         "Competitive Activities" has the meaning given to it in Clause 11.1;

         "Completion Statements" means the Cash Amount Statement, the Working
         Capital Statement and the Cash Deferred Income Amount Statement;

         "Confidentiality Agreement" means the confidentiality agreement dated
         31 October 2003 between the Seller and an Affiliate of the Purchaser
         pursuant to which the Seller made available to the Purchaser and its
         Affiliates and their respective Representatives certain confidential
         information relating to the Group;

         "connected company" has the meaning given to it in Clause 13.9;

         "control" means the power to direct the affairs of a person, directly
         or indirectly, by reason of ownership of voting shares, by contract or
         otherwise. "Controlled" and "controlling" shall have correlative
         meanings;

         "Crown Castle UK" means Crown Castle UK Limited a company incorporated
         in England and Wales whose registered office is at Warwick Technology
         Park, Gallows Hill, Heathcote Lane, Warwick CV34 6TN;

         "Direct Competitor" means any person (including any of its Affiliates)
         that at the time in question engages in Competitive Activities and
         competes directly with the Seller and/or its Subsidiaries in any
         jurisdiction (other than the British Isles) in which the Seller and/or
         its Subsidiaries conduct business as of the date of this Agreement;

         "Disclosure Letter" means the letter dated on the same date as this
         Agreement from the Seller to the Purchaser disclosing information
         constituting exceptions to the Seller's Warranties;

         "Dollars", "$" or "US$" means the tender/currency of the United States;

         "DTT" means Digital Terrestrial Television;

         "employee representatives" has the meaning given to it in paragraph 7.1
         of Schedule 5;

         "Environmental Indemnity" means the indemnity set out in Clause 16;

         "Environment" means air (including air within buildings or other
         structures whether above or below ground), land (including land surface
         or subsurface strata, soil, buildings and other structures), water
         (including surface water, ground water, water within any structures,
         coastal and inland water and water in drains) and any ecological
         systems and living organisms supported by those media including man and
         his property;

         "Environmental Law" means any and all applicable Laws in any
         jurisdiction in which the Company operates in force at the date of this
         Agreement concerning: (i) the pollution or protection of, or
         compensation of damage or harm to the Environment; or (ii) the
         generation, transportation, storage, treatment, disposal or presence of
         any Hazardous Substance;

         "Environmental Licence" means any permit, licence, authorisation,
         exemption, consent, notification or other approval held or required to
         be held by any Group Company pursuant to any Environmental Law;


                                       5



         "Environmental Matters" means all or any matters arising from or
         connected with any Relevant Property or the conduct of the business of
         any Group Company in relation to pollutions or protection of the
         Environment, harm to human health, compliance with, breach of or
         liability under Environmental Law or Environmental Licences, including
         but not limited to those matters relating to waste, nuisance,
         discharges, emissions, deposits, disposals and releases to the
         Environment and the emission, presence, storage, disposal or
         remediation of Hazardous Substances;

         "Estimated Closing Cash Amount" means the Seller's reasonable
         estimation as of the Estimation Date of the Final Closing Cash Amount.
         The Estimated Closing Cash Amount shall be expressed in Sterling;

         "Estimated Cash Deferred Income Amount" means the Seller's reasonable
         estimation as of the Estimation Date of the Final Cash Deferred Income
         Amount. The Estimated Cash Deferred Income Amount shall be expressed in
         Sterling;

         "Estimated Working Capital Adjustment Amount" means the Seller's
         reasonable estimation as of the Estimation Date of the total of the
         Closing Working Capital Amount less the Base Working Capital Amount.
         The Estimated Working Capital Amount shall be expressed in Sterling.
         For example, if the Closing Working Capital Amount is estimated at
         (pound)(3) negative and the Base Working Capital Amount is (pound)(5)
         negative, the Estimated Working Capital Adjustment Amount would equal
         (pound)2 positive;

         "Estimated Tax Written Down Value" means, if Closing happens on or
         prior to 31 August 2004, (pound)234,000,000 (two hundred and thirty
         four million pounds Sterling) or, if Closing happens on or prior to 30
         September 2004 (but after 31 August 2004), (pound)231,500,000 (two
         hundred and thirty one million, five hundred thousand pounds Sterling);

         "Estimation Date" means such date as the Seller estimates in good faith
         to be the date two weeks prior to the Closing Date and which is
         communicated by Notice to the Purchaser not less than two Business Days
         in advance of such estimated date;

         "ETC Status" means exempt telecommunications company status under
         Section 34 of the United States Public Utility Holding Company Act of
         1935;

         "Event" means any event, occurrence, transaction, act or omission (or
         any deemed event, occurrence, transaction, act or omission) including,
         for the avoidance of doubt, the sale and purchase of the Shares
         pursuant to this Agreement;

         "Exchange Act" means the United States Securities Exchange Act of 1934;

         "Expert" has the meaning given to it in Clause 16.7.1;

         "FASB Asset" means the general ledger accounts reflecting the treatment
         of certain cash and non-cash amounts having the reference 1.1821.FASB;

         "FASB Liability" means the general ledger accounts reflecting the
         treatment of certain cash and non-cash amounts having the reference
         1.4299.FASBACCR;

         "FCC" has the meaning given to it in Clause 4.1.2(i);

          "Final Cash Deferred Income Amount" means Cash Deferred Income as set
         out on the Closing Date Balance Sheet or, either (i) if Closing shall
         occur on or prior to 31 August 2004, and the amount of such Cash
         Deferred Income is less than (pound)27,900,000 (twenty seven million,
         nine hundred thousand pounds Sterling), the amount of Cash Deferred
         Income shall be deemed to be (pound)27,900,000 (twenty seven million,
         nine hundred thousand


                                       6



         pounds Sterling); or (ii) if Closing shall occur on or prior to 30
         September 2004 (but after 31 August 2004), and the amount of such Cash
         Deferred Income is less than (pound)23,900,000 (twenty three million,
         nine hundred thousand pounds Sterling), the amount of Cash Deferred
         Income shall be deemed to be (pound)23,900,000 (twenty three million,
         nine hundred thousand pounds Sterling). The Final Cash Deferred Income
         Amount shall be expressed in Sterling;

         "Final Cash Deferred Income Adjustment Amount" means the difference
         (whether positive or negative) between the Estimated Cash Deferred
         Income Amount and the Final Cash Deferred Income Amount. The Final Cash
         Deferred Income Adjustment Amount shall be expressed in Sterling;

         "Final Closing Cash Adjustment Amount" means the difference (whether
         positive or negative) between the Estimated Closing Cash Amount and the
         Final Closing Cash Amount. The Final Closing Cash Adjustment Amount
         shall be expressed in Sterling;

         "Final Closing Cash Amount" means the amount equal to the Cash Balances
         reflected on the Closing Date Balance Sheet. The Final Closing Cash
         Amount shall be expressed in Sterling;

          "Final Working Capital Adjustment Amount" means the total of the
         Closing Working Capital Amount less the Base Working Capital Amount.
         The Final Working Capital Adjustment Amount shall be expressed in
         Sterling. For example, if the Closing Working Capital Amount is
         (pound)(3) negative and the Base Working Capital Amount is (pound)(5)
         negative, the Final Working Capital Adjustment Amount would equal
         (pound)2 positive;

         "Former Employees" has the meaning given to it in paragraph 7.1 of
         Schedule 5;

         "FRS 9" means Financial Reporting Standard 9 issued in November 1997 by
         the Accounting Standards Board and relating to accounting standards for
         associates and joint ventures;

         "Governmental Entity" means any United Kingdom or European Union
         governmental, regulatory or administrative authority, agency or
         commission or any court, tribunal or judicial or arbitral body, or that
         of any other country in which a Group Company operates;

         "GPP" means the group personal pension arrangements in place for
         Relevant Employees and operated by Scottish Widows and Friends
         Provident;

         "Group" means the Group Companies, taken as a whole;

         "Group Companies" means the Company and the Subsidiaries and "Group
         Company" means any one of them;

         "Group Payment Arrangements" means those arrangements provided for in
         Section 36 of the Finance Act 1998;

         "Group Relief" means (i) any Relief surrendered or claimed pursuant to
         Chapter IV of Part X of the Taxes Act, (ii) any advance corporation tax
         surrendered or claimed pursuant to Section 240 of the Taxes Act (as
         that section applies in respect of the accounting period in question)
         and (iii) any refund of Tax surrendered or claimed pursuant to Section
         102 of the Finance Act 1989;


                                       7



         "Guarantor's Warranties" means the warranties given by the Guarantor
         pursuant to Clause 8.7 and Schedule 7 and "Guarantor's Warranty" means
         any one of them;

         "Hazardous Substance" means any natural or artificial substance
         (whether in the form of a solid liquid, gas, vapour or any other form),
         which is:

                  (i)      capable (alone or in combination with any other
                           substance) of causing harm or damage to the
                           Environment, including but not limited to controlled,
                           special, hazardous, polluting, toxic or dangerous
                           substances and/or Asbestos and/or waste; and

                  (ii)     regulated by or under Environmental Laws;

         "ICNIRP" means the International Commission on Non-Ionizing Radiation
         Protection;

         "Indebtedness" of any person shall mean all debts, liabilities and
         obligations, whether accrued or fixed, absolute or contingent, matured
         or unmatured, including (i) all obligations of such person for borrowed
         money, (ii) all obligations of such person evidenced by bonds,
         debentures, notes or similar instruments, (iii) all capital lease
         obligations of such person; and (iv) all guarantees of the obligations
         described in (i), (ii) or (iii) above;

         "Indemnified Party" has the meaning given to it in Clause 14.4;

         "Indemnifying Party" has the meaning given to it in Clause 14.4;

         "Industry Guidelines" means the Reference Levels set out in the
         document, "Restrictions on Human Exposure to Static and Time-Varying
         Electromagnetic Fields and Radiation" published by the National
         Radiological Protection Board in 1993 and the relevant limits for
         occupational and public exposure set out in the "Guidelines for
         Limiting Exposure to Time-Varying Electric, Magnetic and
         Electromagnetic Fields (up to 300 GHz)" published by ICNIRP in 1998;

         "Initial Payment" has the meaning given to it in Clause 14.12;

         "Intellectual Property" means trade marks, service marks, trade names,
         domain names, logos, get-up, patents, inventions, registered and
         unregistered design rights, copyrights, semi-conductor topography
         rights, database rights and all other similar rights in any part of the
         world including, where such rights are obtained or enhanced by
         registration, any registration of such rights and applications and
         rights to apply for such registrations;

          "Intra-Group Indebtedness" means the aggregate amount of the
         Intra-Group Payables minus the aggregate amount of the Intra-Group
         Receivables;

         "Intra-Group Payables" means all outstanding loans or other financing
         Liabilities or obligations owed by any Group Company to a member of the
         Seller's Group as at the close of business on the Closing Date, but
         excluding any Third Party Indebtedness. The amount of such loans,
         Liabilities or obligations shall be reduced for the purposes of this
         definition by any Tax which is required to be withheld from any payment
         in respect of such loan, Liability or obligation;

         "Intra-Group Receivables" means all outstanding loans or other
         financing Liabilities or obligations owed by a member of the Seller's
         Group to any Group Company as at the close of business on the Closing
         Date, but excluding any Third Party Indebtedness. The amount of such
         loans, Liabilities or obligations shall be reduced for the purposes of
         this


                                       8



         definition by any Tax which is required to be withheld from any receipt
         in respect of such loan, Liability or obligation;

         "Know-how" means confidential industrial and commercial information and
         techniques in any form including (without limitation) drawings,
         formulae, test results, reports, project reports and testing
         procedures, instruction and training manuals, tables of operating
         conditions, market forecasts, lists and particulars of customers and
         suppliers;

         "Law" means any English or European law, rule or regulation having
         legal effect or any law of any other country in which a Group Company
         operates;

         "LCIA" has the meaning given to it in Clause 13.21.5;

         "Leasehold/Licenced Property" has the meaning given to it in paragraph
         4.1.1 of Schedule 5;

         "Leasehold Property" has the meaning given to it in paragraph 4.1.1 of
         Schedule 5;

         "Liabilities" means any and all Indebtedness and other liabilities and
         obligations, whether accrued or fixed, absolute or contingent, matured
         or unmatured;

         "Licences" has the meaning given to it in paragraph 8.1.1 of
         Schedule 5;

         "Lien" means any claim, charge, mortgage, lien, pledge, option, equity,
         power of sale, hypothecation, retention of title, right of pre-emption,
         right of first refusal or other third party right or security interest
         of any kind or an agreement, arrangement or obligation to create any of
         the foregoing;

         "Long Life Assets" means "long life assets" with the meaning of section
         91 of the Capital Allowances Act;

         "Long Life Asset Pool" means the Tax Written Down Value of the assets
         which constitute Long Life Assets as of 31 December 2003 of any Group
         Company on the assumption that the current accounting period of each
         Group Company ends on Closing;

         "Long Stop Date" means 30 September 2004;

         "Losses" means all losses, Liabilities, costs (including without
         limitation legal costs and experts' and consultants' fees), charges,
         expenses, actions, proceedings, claims and demands;

         "Major Customer" means any of the customers of the Group which, for the
         financial year ended 31 December 2003, accounted for (pound)1,000,000
         (one million pounds Sterling) or more of the gross revenue of the
         Group;

         "Major Supplier" means any of the suppliers to the Group which, for the
         financial year ended 31 December 2003, accounted for (pound)1,000,000
         (one million pounds Sterling) or more of the gross expenditure of the
         Group;

         "Managed Property" has the meaning given to it in paragraph 4.1.1 of
         Schedule 5;

         "Management Accounts" means the unaudited management accounts relating
         to each Group Company and to the Group of the months ended 30 April
         2004 and 31 May 2004, respectively (the "Relevant Management Accounts
         Date");

         "March Accounts" means the March Balance Sheet and the March Profit and
         Loss Account;


                                       9



         "March Balance Sheet" means the unaudited consolidated balance sheet of
         the Group as at the Accounts Date set out in Part 2 of Schedule 4;

         "March Profit and Loss Account" means the unaudited consolidated profit
         and loss account of the Group for the three month period ended 31 March
         2004;

         "Material Contract" has the meaning given to it in paragraph 6.6 of
         Schedule 5;

         "Mux" or "Multiplex" means any of the frequencies on which a multiplex
         service licensed by Ofcom is provided or any other frequency allocated
         to the BBC for the provision of a multiplex service;

         "NGT Guarantee" has the meaning given to it in Clause 18.2;

         "Non-compete Period" has the meaning given to it in Clause 11.1;

         "Notice" has the meaning given to it in Clause 13.18.1;

         "Notice of Disagreement" has the meaning given to it in paragraph 2.1
         of Part 1 of Schedule 4;

         "NTL Licenced Property" has the meaning given to it in paragraph 4.1.1
         of Schedule 5;

         "Ofcom" means The Office of Communications as established under the
         Office of Communications Act 2002;

         "Order" shall mean any order, writ, injunction, decree, judgment or
         stipulation;

         "Ordinary Course Construction" means any building, construction,
         development or demolition works at any Property that are undertaken for
         the purpose of any Group Company's continued or expanded operation of
         substantially the same business undertaken on such Property on or prior
         to Closing;

         "Owned Mixed Property" has the meaning given to it in paragraph 4.1.1
         of Schedule 5;

         "Owned Real Property" has the meaning given to it in paragraph 4.1.1 of
         Schedule 5;

         "Permitted Liens" means (i) mechanics', carriers', worksmen's,
         repairmen's or other similar Liens arising or incurred in the ordinary
         course of the Group's business, (ii) conditional sales contracts and
         equipment leases with third parties entered into in the ordinary course
         of the Group's business, (iii) Liens for Taxes, assessments and other
         governmental charges that are not due and payable or that may
         thereafter be paid without penalty or that are being contested in good
         faith; and (iv) other Liens and imperfections of title which do not, or
         are not reasonably likely to impair in any material respect the
         continued use and operation of the assets to which they relate in the
         Group's business as currently conducted;

         "Planning Acts" means the Town and Country Planning Act 1990, the
         Planning (Listed Buildings and Conservation Areas) Act 1990, the
         Planning (Hazardous Substances) Act 1990, the Planning (Consequential
         Provisions) Act 1990 and the Planning and Compensation Act 1991;

         "Plant and Machinery" means assets of the Group which are entitled to
         Capital Allowances under Part 2 of the Capital Allowances Act;

         "Post-Closing Relief" means any Relief which is not available before
         the Closing Date and arises in respect of an Event occurring after the
         Closing Date;


                                       10



         "Post-Closing Tax Period" means any taxable period beginning after the
         Closing Date;

         "PPA Interest Rate" means, as of any date of determination for any
         applicable currency, the rate of interest from time to time announced
         publicly by Barclays Bank plc, as its base rate, calculated on the
         basis of the actual number of days elapsed divided by 365, from the
         Closing Date to the date of payment;

         "Pre-Closing Tax Period" means any taxable period ending on or before
         the Closing Date;

         "Projected Cost" means the projected cost of construction to practical
         completion of such assets as are set out in the "Capital Expenditure
         Evaluation" forms in respect of telecommunication assets under
         construction and "Capital Expenditure Proposal" forms in respect of
         other assets under construction;

         "Properties" means Owned Real Property, Owned Mixed Property,
         Leasehold/Licenced Property, NTL Licenced Property and Managed
         Property, being the properties set out in Section 4.1.1 of Schedule 5
         of the Disclosure Letter, and "Property" means any one of them;

         "Purchaser Relief" means any Relief or right to repayment of Taxes or
         right to any payment in respect of any surrender of Group Relief taken
         into account as an asset in preparing the Working Capital Statement or
         in reducing or eliminating any provision or reserve for taxation in the
         Working Capital Statement;

         "Purchaser's Group" means the Purchaser and its subsidiaries from time
         to time;

         "Purchaser's Nominated Account" means such account as the Purchaser
         shall notify in writing to the Seller not less than two Business Days
         prior to the Closing Date;

         "Purchaser's Warranties" means the warranties given by the Purchaser
         pursuant to Clause 8.5 and Schedule 6 and "Purchaser's Warranty" means
         any one of them;

         "Radiation" means any electric, magnetic or electromagnetic radiation,
         frequencies or fields or radio waves;

         "Relevant Employees" has the meaning given to it in paragraph 7.1 of
         Schedule 5;

         "Relevant Equipment" means any television and radio broadcasting mast
         or television and radio transmitter equipment owned or operated by any
         Group Company at any Property;

         "Relevant Payment" has the meaning given to it in Clause 14.9;

         "Relevant Period" means the 12 month period preceding the date of this
         Agreement;

         "Relevant Receipt" has the meaning given to it in Clause 14.9;

         "Relevant Recipient" has the meaning given to it in Clause 14.9;

         "Relief" means any loss, allowance, exemption, set-off, deduction,
         refund, credit, or other relief relating to any Taxes or to the
         computation of income, profits or chargeable gains for the purposes of
         any Taxes (excluding, in any case, any Capital Allowances) including
         any repayment or reapportionment under any Group Payment Arrangements;

         "Remedial Action" means any measures reasonably necessary undertaken or
         to be undertaken by the Purchaser (or the Seller for the purposes of
         Clause 16.6) for


                                       11



         investigating, assessing, limiting, removing, remedying, cleaning up,
         abating, containing, preventing, monitoring or ameliorating the
         presence or effect of any Hazardous Substance or Radiation in
         accordance with Environmental Law and Industry Guidelines;

         "Representative" means, with respect to any person, such person's
         employees, counsel, accountants and other representatives and
         professional advisers;

         "Representative Body" means any association, trade union, works council
         or other body or persons representing any of the employees;

         "Retained Names and Marks" has the meaning given to it in
         Clause 13.2.1;

         "Rules" has the meaning given to it in Clause 13.21.5;

         "Sarbanes-Oxley" means the United States Sarbanes-Oxley Act 2002 and
         the related rules and regulations promulgated under such act or the
         Exchange Act;

         "Saving" has the meaning given to it in Clause 14.20;

         "SEC" means the Securities and Exchange Commission of the
         United States;

         "Secondary Adjustment" has the meaning given to it in Clause 14.12;

         "Secondary Recovery Provision" has the meaning given to it in paragraph
         12 of Schedule 5;

         "Seller Change of Control" means any person or group (as such terms are
         used in Sections 13(d) and 14(d) of the Exchange Act) becoming, or
         obtaining rights (whether by means of warrants, options or otherwise)
         to become, the beneficial owner (as defined in Rules 13d-3 and 13d-5
         under the Exchange Act), directly or indirectly, of more than 40% of
         the outstanding common stock of the Seller;

         "Seller's Group" means the Seller and its subsidiaries, subsidiary
         undertakings and Affiliates from time to time (excluding (for the
         purposes of the definitions of Intra-Group Payables, Intra-Group
         Receivables and Third Party Indebtedness) the Group Companies);

         "Seller's Nominated Account" means such account as the Seller shall
         notify in writing to the Purchaser not less than two Business Days
         prior to the Closing Date;

         "Seller's Pension Scheme" means the  Crown Castle UK Pension Scheme;

         "Seller's Relief" means any Relief or right to repayment of Taxes
         (other than any Purchaser Relief) available to any Group Company that
         arises as a result of an Event occurring or deemed to occur for Tax
         purposes on or before the Closing Date;

         "Seller's Warranties" means the warranties given by the Seller pursuant
         to Clause 8.1 and Schedule 5 and "Seller's Warranty" means any one of
         them;

         "Senior Employee" has the meaning given to it in paragraph 7 of
         Schedule 5;

         "Settlement Amount" means US$147,200,000 (one hundred and forty seven
         million, two hundred thousand Dollars);

         "Shares" means 333,595,225 ordinary shares of (pound)1 each, being the
         whole of the issued ordinary share capital of the Company;

         "Share Option Relief" means any Relief other than a Purchaser's Relief
         (or a Seller's Relief taken into account pursuant to Clause 14.11)
         which the Purchaser or any Group


                                       12



         Company obtains after Closing (or which the Purchaser or a Group
         Company would obtain but for an insufficiency of profits) pursuant to
         Part 1 of Schedule 23 Finance Act 2003 in relation to any share
         incentive, share option or other incentive granted before Closing to
         any Relevant Employee or former employee of any Group Company;

         "Site Sharing Agreements" has the meaning given to it in paragraph
         4.1.2 of Schedule 5;

         "Sterling" or "(pound)" means the legal tender/currency of the United
         Kingdom;

         "Straddle Period" means in relation to a Group Company, the accounting
         period of that Group Company in which the Closing Date falls;

         "Subsidiaries" means the subsidiaries of the Company listed in
         paragraph 2 of Schedule 1 together with any other subsidiary
         undertakings of the Company and "Subsidiary" means any one of them;

         "Tax Authority" means any taxing or other authority competent to impose
         any liability in respect of Taxation or responsible for the
         administration and/or collection of Taxation or enforcement of any law
         in relation to Taxation;

         "Tax Controversy" has the meaning given to it in Clause 14.5;

         "Tax Indemnity" means the indemnity in respect of Taxation set out in
         Clause 14;

         "Tax Return" means any return, filing, report, questionnaire,
         information statement, self-assessment, computation or other document
         required to be filed, including any amendments that may be filed, for
         any taxable period with any Tax Authority (whether or not a payment is
         required to be made with respect to such filing);

         "Tax Warranties" has the meaning given to it in Clause 14.2 and "Tax
         Warranty" means any one of them;

         "Tax Written Down Value" means the unrelieved qualifying expenditure to
         carry forward from the chargeable period which ends on the date in
         question (as determined in accordance with section 59 of the Capital
         Allowances Act);

         "Taxation", "Taxes" or "Tax" means all forms of taxation whether direct
         or indirect and whether levied by reference to income, profits, gains,
         net wealth, asset values, turnover, added value or other reference and
         statutory, governmental, state, provincial, local governmental or
         municipal impositions, duties, contributions and levies (including
         without limitation social security contributions and any other payroll
         taxes), whenever and wherever imposed (whether imposed by way of a
         withholding or deduction for or on account of tax or otherwise) and in
         respect of any person and all penalties, charges, costs and interest
         relating thereto;

         "Taxes Act" means the Income and Corporation Taxes Act 1988;

         "Third Party Indebtedness" means the aggregate amount as at the close
         of business on the Closing Date of all outstanding Indebtedness owed by
         any Group Company to any third party or owed by any third party to any
         Group Company;

         "TM Licence Agreement" means the agreement on the Agreed Terms between
         the Seller and the Purchaser or their respective Affiliates in relation
         to the licence of the Retained Names and Marks, to be entered into on
         the Closing Date;

         "TM Termination Date" shall have the meaning set out in Clause 13.2.4;






                                       13



         "Total Construction Cost" means the cost of construction to practical
         completion of such individual assets under construction, calculated by
         reference to the Group's existing accounting policies, practices and
         methodologies used for the capitalisation of such costs;

         "Transfer Regulations" has the meaning given to it in paragraph 7.1 of
         Schedule 5;

         "Transitional Services Agreement" means the agreement between the
         Seller and the Purchaser or their respective Affiliates in relation to
         Mobile Media to be entered into on the Closing Date substantially on
         the basis of the provisions set out in Schedule 9;

         "UK GAAP" means United Kingdom generally accepted accounting practice
         in effect as of the date of this Agreement;

         "United Kingdom" means the United Kingdom of Great Britain and Northern
         Ireland;

         "VAT" means United Kingdom Value Added Tax;

         "Warranty" means any Seller's Warranty, any Purchaser's Warranty and
         any Guarantor's Warranty;

         "Wireless Telegraphy Act" means the Wireless Telegraphy Act 1949 to
         1998; and

         "Working Capital Statement" has the meaning given to it in Clause 7.2.

1.2      Modification etc. of Statutes

         References to a statute or statutory provision include:

         1.2.1    that statute or provision as from time to time modified,
                  re-enacted or consolidated whether before or after the date of
                  this Agreement;

         1.2.2    any past statute or statutory provision (as from time to time
                  modified, re-enacted or consolidated) which that statute or
                  provision has directly or indirectly replaced; and

         1.2.3    any subordinate legislation made from time to time under that
                  statute or statutory provision,

         provided that such references shall not include such modifications,
         re-enactments, consolidations, direct or indirect replacements, or
         subordinate legislation arising after the date of this Agreement to the
         extent that the Liability of any party would be increased or extended
         by the inclusion thereof.

1.3      Singular, plural, gender

         References to one gender include all genders and references to the
         singular include the plural and vice versa.

1.4      References to persons and companies

         References to:

         1.4.1    a person shall include any natural person, corporation,
                  company, partnership firm, joint venture, trust, business
                  association, Governmental Entity or other entity (whether or
                  not having separate legal personality); and

         1.4.2    a company shall include any company, corporation or any body
                  corporate, wherever incorporated.


                                       14



1.5      References to subsidiaries and holding companies

         The words "holding company", "subsidiary" and "subsidiary undertaking"
         shall have the same meaning in this Agreement as their respective
         definitions in the Companies Act.

1.6      Connected Persons

         A person shall be deemed to be connected with another if that person is
         connected with such other within the meaning of Section 839 of the
         Taxes Act.

1.7      Recitals and Schedules etc.

         References to this Agreement shall include any Recitals and Schedules
         to it and references to Clauses and Schedules are to Clauses of, and
         Schedules to, this Agreement. References to paragraphs and Parts are to
         paragraphs and Parts of the Schedules.

1.8      Headings

         Headings shall be ignored in interpreting this Agreement.

1.9      Legal Terms

         References to any English legal term shall, in respect of any
         jurisdiction other than England, be construed as references to the term
         or concept which most nearly corresponds to it in that jurisdiction.

2        Agreement to Sell the Shares

         2.1.1    On and subject to the terms of this Agreement, the Seller
                  agrees to sell or procure to be sold and the Purchaser agrees
                  to purchase, the Shares.

         2.1.2    The Shares shall be sold or procured to be sold by the Seller
                  with full title guarantee free from Liens and together with
                  all rights and advantages attaching to them as at Closing
                  (including, without limitation, the right to receive all
                  dividends or distributions declared, made or paid on or after
                  Closing).

         2.1.3    The Seller shall procure that on or prior to Closing any and
                  all rights of pre-emption over the Shares are waived
                  irrevocably by the persons entitled thereto.

         2.1.4    Subject to the parties agreeing in writing, in the event that
                  the Seller has, prior to Closing and in accordance with such
                  agreement, transferred or procured the transfer of the Shares
                  to another company or other entity, the Seller shall sell or
                  procure to be sold to the Purchaser that company or entity on
                  and subject to the terms of this Agreement and references to
                  the "Company", "Group Companies", "Group" and "Shares" shall
                  be construed accordingly.

3        Consideration

3.1      Amount

         The consideration for the purchase of the Shares under this Agreement
         shall be an amount in cash equal to US$1,887,800,000 (one billion,
         eight hundred and eighty seven million, eight hundred thousand Dollars)
         (the "Closing Amount") subject to adjustment as set out in Clause 7.


                                       15



3.2      Reduction of Consideration

         If any payment is made by the Seller to the Purchaser or by the
         Purchaser to the Seller in respect of any claim for any breach of this
         Agreement or pursuant to an indemnity, compensation or reimbursement
         provision (including, for the avoidance of doubt, any payment under any
         Warranty or any payment under Clause 14 (Tax Indemnity)) under this
         Agreement (or any agreement entered into under this Agreement), the
         payment shall be made by way of adjustment of the consideration paid by
         the Purchaser for the Shares under this Agreement and the consideration
         shall be reduced (in the case of a payment by the Seller to the
         Purchaser) or increased (in the case of a payment by the Purchaser to
         the Seller) by the amount of such payment.

4        Conditions

4.1      Conditions Precedent

         The agreement to sell and purchase the Shares contained in Clause 2 is
         conditional upon satisfaction of the conditions set out in Clauses
         4.1.1 to 4.1.4, or their satisfaction subject only to Closing:

         4.1.1

                  (i)      the Office of Fair Trading having indicated on terms
                           reasonably satisfactory to the Purchaser that it will
                           not make a reference to the Competition Commission in
                           relation to the purchase of the Shares as
                           contemplated by this Agreement; or

                  (ii)     the time provided for under the Enterprise Act 2002
                           during which the Office of Fair Trading may make a
                           reference to the Competition Commission having
                           expired, without the Office of Fair Trading having
                           made such a reference or having indicated that it
                           will not make such a reference;

         4.1.2

                  (i)      the Company, having received an order from the United
                           States Federal Communications Commission ("FCC"), on
                           terms reasonably satisfactory to the Purchaser,
                           granting the Company's application for ETC Status; or

                  (ii)     in the alternative, 60 days having passed from the
                           date of the filing with the FCC of the Company's
                           application for a determination of ETC Status, and
                           the application being deemed granted as a matter of
                           law under Title 47 of the United States Code of
                           Federal Regulations Section 1.5004;

         4.1.3    The BBC's right to terminate under any of: (a) the BBC
                  Analogue Transmission Agreement; (b) the BBC Mux 1 DTT
                  Transmission Agreement; (c) the BBC DAB Transmission
                  Agreement; and (d) the BBC Mux B DTT Transmission Agreement
                  having elapsed by effluxion of time without the BBC having
                  terminated or having given and not withdrawn notice to
                  terminate, each such agreement or the BBC having provided
                  comfort, on terms reasonably satisfactory to the Purchaser,
                  that it will not exercise any termination rights for Change of
                  Control (as defined in the relevant agreement) under any such
                  agreements as a consequence of the purchase of the Shares as
                  contemplated by this Agreement; and


                                       16



         4.1.4    Ofcom having provided comfort, on terms reasonably
                  satisfactory to the Purchaser, that it will not exercise its
                  revocation rights in relation to: (a) the Multiplex C and D
                  licences granted to the Company under the Broadcasting Act; or
                  (b) any licences under the Wireless Telegraphy Act (to the
                  extent that such licences may be revoked in such
                  circumstances); as a consequence of the purchase of the Shares
                  as contemplated by this Agreement.

         4.1.5    For the purposes of Clause 4.1.1 and for the avoidance of
                  doubt, terms shall not be reasonably satisfactory to the
                  Purchaser if they would require the Purchaser to commit to
                  divest (or not to acquire) assets with a value in excess of
                  (pound)20 million or, in the case of behavioural commitments,
                  would amount to a more than immaterial change in the terms
                  upon which either the Purchaser's Group or the Group Companies
                  do business.

         4.1.6    For the purposes of Clauses 4.1.3 and 4.1.4, if a letter is
                  received from the BBC or Ofcom, in each case, on substantially
                  the Agreed Terms, then such letter shall be deemed to be
                  reasonably satisfactory to the Purchaser.

4.2      Responsibility for Satisfaction

         4.2.1    The Purchaser shall use reasonable endeavours to ensure the
                  satisfaction of the conditions set out in Clauses 4.1.1, 4.1.3
                  and 4.1.4 as soon as possible after the date of this Agreement
                  and in any event no later than the Long Stop Date.

         4.2.2    The Seller shall use reasonable endeavours to ensure the
                  satisfaction of the conditions set out in Clauses 4.1.2, 4.1.3
                  and 4.1.4 as soon as possible after the date of this Agreement
                  and in any event no later than the Long Stop Date.

         4.2.3    Without prejudice to Clauses 4.2.1 and 4.2.2, the Seller and
                  the Purchaser agree that, to the extent permitted by law, all
                  requests and enquiries from any governmental entity, after the
                  date of this Agreement, in relation to the satisfaction of the
                  conditions set out in Clause 4.1 shall be dealt with:

                  (i)      in the case of Clauses 4.1.1, 4.1.3 and 4.1.4 by the
                           Purchaser in consultation with the Seller; (1) that
                           the Purchaser shall promptly notify the Seller of all
                           its contacts and discussions with any Governmental
                           Entity or the BBC and of any request by any
                           Governmental Entity or the BBC in relation to the
                           satisfaction of such conditions, (2) that the
                           Purchaser shall promptly supply the Seller with
                           copies of all written communications including
                           notifications, submissions and correspondence and
                           written or oral summaries of all material oral
                           comments between the Purchaser or any of its
                           Representatives, on the one hand, and any
                           Governmental Entity or the BBC on the other hand; and
                           (3) that the Seller shall co-operate with and provide
                           all necessary information and assistance reasonably
                           required by such Governmental Entity or the BBC upon
                           being requested to do so by the Purchaser. The
                           Purchaser shall co-operate and promptly provide the
                           Seller with drafts of all written correspondence
                           intended to be sent to any Governmental Entity or the
                           BBC and, to the extent practicable, allow the Seller
                           the opportunity to comment thereon prior to delivery
                           to any Governmental Entity or the BBC; and

                  (ii)     in the case of Clauses 4.1.2, 4.1.3 and 4.1.4 by the
                           Seller in consultation with the Purchaser; (1) that
                           the Seller shall promptly notify the Purchaser of








                                       17



                           all its contacts and discussions with the FCC, the
                           BBC or any Governmental Entity in relation to the
                           satisfaction of such conditions; (2) that the Seller
                           shall promptly supply the Purchaser with copies of
                           all written communications including notifications,
                           submissions and correspondence and written or oral
                           summaries of all material oral comments between the
                           Seller or any of its representatives, on the one
                           hand, and the FCC, the BBC or any Governmental Entity
                           on the other hand; and (3) that the Purchaser shall
                           co-operate with and provide all necessary information
                           and assistance reasonably required by the FCC, the
                           BBC or any Governmental Entity upon being requested
                           to do so by the Seller. The Seller shall co-operate
                           and promptly provide the Purchaser with drafts of all
                           written correspondence intended to be sent to the
                           FCC, the BBC or any Governmental Entity and, to the
                           extent practicable, allow the Purchaser the
                           opportunity to comment thereon prior to delivery to
                           the FCC, the BBC or any Governmental Entity.

4.3      Non-Satisfaction/Waiver

         4.3.1    The party responsible for satisfaction of each condition, as
                  set out in Clause 4.2, shall give Notice to the other party of
                  the satisfaction of the relevant condition within two Business
                  Days of becoming aware of the same.

         4.3.2    The Purchaser may at any time waive in whole or in part and
                  conditionally or unconditionally the conditions set out in
                  Clause 4.1 by Notice to the Seller.

         4.3.3    If the conditions in Clause 4.1 are not satisfied or waived on
                  or before the Long Stop Date save as expressly provided, this
                  Agreement (other than Clauses 1, 12 and 13.6 to 13.22) shall
                  lapse and neither the Seller nor the Purchaser shall have any
                  claim against the other under it, save for any claim arising
                  from breach of any obligation contained in Clause 4.2.

5        Pre-Closing

5.1      The Seller's Obligations in Relation to the Conduct of Business

         Except as otherwise contemplated or permitted by this Agreement, from
         the date of this Agreement to the Closing, unless the Purchaser
         otherwise consents (which consent shall not be unreasonably withheld or
         delayed), the Seller (i) shall procure that each of the Group Companies
         conducts its business in all material respects in the ordinary course
         as carried on prior to the date of this Agreement; and (ii) shall or
         shall procure that the relevant members of the Seller's Group shall
         maintain in force all existing insurance policies in all material
         respects on the same terms and similar level of cover prevailing at the
         date of this Agreement for the benefit of the Group Companies and,
         immediately following the signing of this Agreement, procure the
         interest of the Purchaser to be noted on such insurance policies. In
         addition, during such period, except as otherwise contemplated or
         permitted by this Agreement or set out in Section 5.1 of the Disclosure
         Letter, unless the Purchaser otherwise consents in writing (which
         consent shall not be unreasonably withheld or delayed), the Seller
         shall not, and shall not permit any Group Company to, do any of the
         following:

         5.1.1    resolve to alter its memorandum or articles of association (or
                  comparable constitutive documents), save as required by Law;








                                       18



         5.1.2    save as set out in the Budget, enter into any agreement or
                  incur any commitment involving any capital expenditure in
                  excess of, or consideration equivalent to, (pound)350,000
                  (three hundred and fifty thousand pounds Sterling) per item or
                  (pound)3,500,000 (three million, five hundred thousand pounds
                  Sterling) in aggregate, in each case exclusive of VAT;

         5.1.3    make any material amendment to the terms and conditions of
                  employment (including remuneration, pension entitlements and
                  other benefits) of any Relevant Employee or dismiss any Senior
                  Employee;

         5.1.4    except in the ordinary course of business and consistent with
                  past practice, amend in any material respect or enter into any
                  agreement of a type required to be disclosed pursuant to
                  paragraph 6.2 of Schedule 5;

         5.1.5    incur any additional borrowings or incur any other
                  Indebtedness otherwise than in the ordinary and usual course
                  of business;

         5.1.6    create a Lien over the Shares or the shares or material assets
                  of any Group Company except Permitted Liens in the case of
                  assets of any Group Company;

         5.1.7    create, allot, issue, repay, redeem or repurchase any share
                  capital or loan capital of any Group Company;

         5.1.8    acquire or agree to acquire or lease any material assets
                  (including real property) outside the ordinary course of
                  business;

         5.1.9    declare, make or pay any dividend in kind or other
                  distribution in kind to shareholders, or otherwise make or pay
                  any dividend or other distribution to shareholders, other than
                  out of such Group Company's ordinary income and cash flows;

         5.1.10   sell, lease or otherwise dispose of any of the material assets
                  (including real property) of the Group outside the ordinary
                  course of business;

         5.1.11   discontinue or amend the Seller's Pension Scheme to any
                  material extent or commence to wind it up or terminate it or
                  cause it to cease to admit new members;

         5.1.12   repay any material Indebtedness (other than in accordance with
                  or to fulfil the terms and conditions of this Agreement);

         5.1.13   make or pay any management charge outside the ordinary course
                  of business consistent with past practice; or

         5.1.14   agree, in writing or otherwise, to do any of the foregoing.

5.2      Notification

         Without prejudice to the provisions of Clause 5.4.1(iv), if, after the
         signing of this Agreement, the Seller becomes aware of any breach in
         any material respect of the obligations set out in Clause 5.1, the
         Seller shall promptly notify the Purchaser in writing and shall take
         all reasonable steps to remedy such breach.


                                       19



5.3      Other Seller's Obligations Prior to Closing

         Without prejudice to the generality of Clause 5.1, and to the extent
         permitted under applicable laws (anti-trust or otherwise) prior to
         Closing the Seller shall:

         5.3.1    procure that the Group Companies shall consult with the
                  Purchaser in relation to all material matters concerning the
                  running of the Group;

         5.3.2    procure that the Group Companies shall provide to the
                  Purchaser and its Representatives such information as they may
                  reasonably request for the purpose of monitoring the status of
                  the business in this period and preparing a post-Closing
                  integration plan; and

         5.3.3    use reasonable endeavours to procure that Crown Castle UK and
                  Crown Castle UK Pension Trust Limited execute a deed as soon
                  as reasonably practicable following the date of this Agreement
                  in relation to the Seller's Pension Scheme which is
                  substantially in the form of the draft Second Definitive Deed
                  and Rules disclosed to the Purchaser pursuant to Section 6.7
                  of the Disclosure Letter.

5.4      Termination

         5.4.1    Notwithstanding anything in this Agreement to the contrary,
                  this Agreement may be terminated and the transactions
                  contemplated hereby abandoned at any time prior to the Closing
                  Date:

                  (i)      by mutual agreement of the Seller and the Purchaser;

                  (ii)     by the Seller upon Notice to the Purchaser if any of
                           the conditions to the Closing set out in Clause 4.1
                           shall have become incapable of fulfilment;

                  (iii)    by either the Seller or the Purchaser upon Notice to
                           the other party if the Closing does not occur on or
                           prior to the Long Stop Date and the party seeking
                           termination is not then in fundamental breach of its
                           warranties referred to in Clause 5.4.2 or Clause
                           5.4.3, as the case may be, or any of its material
                           covenants or agreements set forth in this Agreement;

                  (iv)     by the Purchaser upon Notice to the Seller if the
                           Seller shall have failed to comply in any material
                           respect with its obligations as set out in Clause
                           5.1, except for non-compliance not resulting in a
                           material and adverse effect on the business of the
                           Group; and

                  (v)      by either the Purchaser or the Seller in accordance
                           with Clause 6.5.

         5.4.2    Subject to Clause 5.4.1, the Purchaser shall not be entitled
                  to rescind or terminate this Agreement, or any part of it, at
                  any time prior to or after the Closing Date, for any reason,
                  save in the case of a fundamental breach of the Seller's
                  Warranties set out in paragraphs 1.1.1 to 1.1.3, 1.1.5, 1.1.6
                  or 15 of Schedule 5.

         5.4.3    Subject to Clause 5.4.1, the Seller shall not be entitled to
                  rescind or terminate this Agreement, or any part of it, at any
                  time prior to or after the Closing Date, for any reason, save
                  in the case of a fundamental breach of (i) the Purchaser's
                  Warranties set out in paragraphs 1 and 6 of Schedule 6; or
                  (ii) the Guarantor's Warranties set out in Schedule 7.


                                       20



         5.4.4    The termination of this Agreement pursuant to Clauses 5.4.1,
                  5.4.2 and 5.4.3 shall not operate to terminate Clauses 1, 12
                  and 13.6 to 13.22 which shall remain in full force and effect.

         5.4.5    Any failure by a party to exercise its right to terminate this
                  Agreement under Clauses 5.4.1, 5.4.2 or 5.4.3 shall not
                  constitute a waiver of any other rights of such party.

5.5      Material to be Returned

         5.5.1    In the event that this Agreement is terminated by the Seller
                  or the Purchaser pursuant to Clause 5.4, Notice thereof shall
                  forthwith be given to the other party, and the transactions
                  contemplated by this Agreement shall be terminated, without
                  further action by any party hereto.

         5.5.2    Furthermore, in the event that this Agreement is terminated as
                  provided herein:

                  (i)      the Purchaser shall return all documents and other
                           material received from the Seller or its Affiliates
                           or any of their Representatives relating to any Group
                           Company or the transactions contemplated by this
                           Agreement, whether obtained before or after the
                           execution of this Agreement, to the Seller;

                  (ii)     the Purchaser agrees that all confidential
                           information received by the Purchaser or its
                           Affiliates or any of their Representatives with
                           respect to any Group Company, this Agreement or the
                           transactions contemplated hereby shall be treated in
                           accordance with Clause 12, which shall remain in full
                           force and effect notwithstanding the termination of
                           this Agreement;

                  (iii)    the Seller shall return all documents and other
                           material received from the Purchaser or its
                           Affiliates or any of their Representatives relating
                           to the Purchaser or the transactions contemplated by
                           this Agreement, whether obtained before or after the
                           execution of this Agreement, to the Purchaser; and

                  (iv)     the Seller agrees that all confidential information
                           received by the Seller or its Affiliates or any of
                           their Representatives with respect to the Purchaser,
                           this Agreement or the transactions contemplated
                           hereby shall be treated as confidential and otherwise
                           in accordance with Clause 12, which shall remain in
                           full force and effect notwithstanding the termination
                           of this Agreement.

6        Closing

6.1      Pre-Closing Notifications

         On the Estimation Date, the Seller shall notify the Purchaser in
         writing of the Estimated Working Capital Adjustment Amount, the
         Estimated Closing Cash Amount and the Estimated Cash Deferred Income
         Amount, together with adequate details of how such amounts have been
         calculated.

6.2      Date and Place

         Subject to Clause 4, Closing shall take place at 10 a.m. (London time)
         at the offices of Cravath, Swaine & Moore LLP, City Point, One
         Ropemaker Street, London EC2Y 9HR on




                                       21



         the last day of the calendar month in which the condition(s) set out in
         Clause 4.1 are either satisfied or waived, or if such day is not a
         Business Day, the first Business Day thereafter or at such other
         location, time or date as may be agreed between the Purchaser and the
         Seller, when all (but not part only unless the parties so agree) of the
         business set out in Schedule 3 shall be transacted.

6.3      Closing Events

         On Closing, the Seller and the Purchaser shall comply with their
         respective obligations specified in Schedule 3.

6.4      Payment on Closing

         On the Closing Date, the Purchaser shall pay the Closing Amount plus
         the Estimated Working Capital Adjustment Amount (if a positive number)
         or less the Estimated Working Capital Adjustment Amount (if a negative
         number) plus the Estimated Closing Cash Amount (if a positive number)
         or less the Estimated Closing Cash Amount (if a negative number) and
         less the Estimated Cash Deferred Income Amount by wire transfer of
         immediately available funds to the Seller's Nominated Account.

6.5      Breach of Closing Obligations

         If the Seller or the Purchaser fails to comply with any material
         obligation in Clauses 6.3 and 6.4 and Schedule 3, the Purchaser, in the
         case of non-compliance by the Seller, or the Seller, in the case of
         non-compliance by the Purchaser, shall be entitled (in addition to and
         without prejudice to all other rights or remedies available, including
         the right to claim damages) by Notice to the other:

         6.5.1    to terminate this Agreement (other than Clauses 1, 12, 13.6 to
                  13.22) without liability on its part;

         6.5.2    to effect Closing so far as practicable having regard to the
                  defaults which have occurred; or

         6.5.3    to fix a new date for Closing (not being more than 10 Business
                  Days after the agreed date for Closing) in which case the
                  provisions of Schedule 3 shall apply to Closing as so deferred
                  but provided such deferral may only occur once.

7        Post-Closing Adjustments

7.1      Closing Date Balance Sheet

         As soon as reasonably practicable and no later than 30 Business Days
         after the Closing Date, the Purchaser shall prepare and deliver to the
         Seller a consolidated balance sheet of the Group as of the close of
         business on the Closing Date (the "Closing Date Balance Sheet"). The
         Closing Date Balance Sheet shall be prepared in accordance with the
         Accounting Policies.

7.2      Working Capital Statement etc.

         The Closing Date Balance Sheet shall be accompanied by (i) a statement
         (the "Working Capital Statement") setting out the Purchaser's
         reasonable determination of the Closing Working Capital Amount as at
         the Closing Date; (ii) a statement setting out the Purchaser's
         reasonable determination of the Cash Deferred Income Amount as at the
         Closing Date (the "Cash Deferred Income Amount Statement"); and (iii) a
         statement setting out the


                                       22



         Purchaser's reasonable determination of the Final Closing Cash Amount
         as at the Closing Date (the "Cash Amount Statement"). The Working
         Capital Statement, the Cash Deferred Income Amount Statement and the
         Cash Amount Statement shall become binding on the Seller and the
         Purchaser upon final agreement or determination in accordance with the
         procedures set out in paragraph 2 of Part 1 of Schedule 4.

7.3      Adjustment to Consideration

         7.3.1    The consideration payable for the Shares shall be increased by
                  the amount by which the Closing Working Capital Amount exceeds
                  the Base Working Capital Amount, and the consideration payable
                  for the Shares shall be decreased by the amount by which the
                  Closing Working Capital Amount is less than the Base Working
                  Capital Amount. Accordingly, within five Business Days after
                  the Working Capital Statement becomes binding pursuant to
                  paragraph 2 of Part 1 of Schedule 4:

                  (i)      if the Final Working Capital Adjustment Amount is
                           greater than the Estimated Working Capital Adjustment
                           Amount, then the Purchaser shall pay to the Seller by
                           wire transfer of immediately available funds to the
                           Seller's Nominated Account an amount equal to the
                           difference between the Estimated Working Capital
                           Adjustment Amount and the Final Working Capital
                           Adjustment Amount, together with an amount thereon
                           calculated by reference to the PPA Interest Rate from
                           and including the Closing Date to but not including
                           the date of such payment; and

                  (ii)     if the Estimated Working Capital Adjustment Amount is
                           greater than the Closing Working Capital Amount, then
                           the Seller shall pay to the Purchaser by wire
                           transfer of immediately available funds to the
                           Purchaser's Nominated Account an amount equal to the
                           difference between the Estimated Working Capital
                           Adjustment Amount and the Final Working Capital
                           Adjustment Amount, together with an amount thereon
                           calculated by reference to the PPA Interest Rate from
                           and including the Closing Date to but not including
                           the date of such payment.

         7.3.2    The consideration paid pursuant to Clause 6.4 shall be
                  increased by the amount by which the Final Closing Cash Amount
                  exceeds the Estimated Closing Cash Amount, and the
                  consideration paid pursuant to Clause 6.4 shall be decreased
                  by the amount by which the Final Closing Cash Amount is less
                  than the Estimated Closing Cash Amount. Accordingly, within
                  five Business Days after the Cash Amount Statement becomes
                  binding pursuant to paragraph 2 of Part 1 of Schedule 4:

                  (i)      if the Final Closing Cash Amount is greater than the
                           Estimated Closing Cash Amount, then the Purchaser
                           shall pay to the Seller by wire transfer of
                           immediately available funds to the Seller's Nominated
                           Account an amount equal to the Final Closing Cash
                           Adjustment Amount, together with an amount thereon
                           calculated by reference to the PPA Interest Rate from
                           and including the Closing Date to but not including
                           the date of such payment; and


                                       23



                  (ii)     if the Final Closing Cash Amount is less than the
                           Estimated Closing Cash Amount, then the Seller shall
                           pay to the Purchaser by wire transfer of immediately
                           available funds to the Purchaser's Nominated Account
                           an amount, equal to the Final Closing Cash Adjustment
                           Amount, together with an amount thereon calculated by
                           reference to the PPA Interest Rate from and including
                           the Closing Date to but not including the date of
                           such payment

         7.3.3    The consideration paid pursuant to Clause 6.4 shall be
                  increased by the amount by which the Estimated Cash Deferred
                  Income Amount exceeds the Final Cash Deferred Income Amount,
                  and the consideration paid pursuant to Clause 6.4 shall be
                  decreased by the amount by which the Estimated Cash Deferred
                  Income Amount is less than the Final Cash Deferred Income
                  Amount. Accordingly, within five Business Days after the Cash
                  Deferred Income Amount Statement becomes binding pursuant to
                  paragraph 2 of Part 1 of Schedule 4:

                  (i)      if the Estimated Cash Deferred Income Amount is
                           greater than the Final Cash Deferred Income Amount,
                           then the Purchaser shall pay to the Seller by wire
                           transfer of immediately available funds to the
                           Seller's Nominated Account an amount equal to the
                           Final Cash Deferred Income Adjustment Amount,
                           together with an amount thereon calculated by
                           reference to the PPA Interest Rate from and including
                           the Closing Date to but not including the date of
                           such payment; and

                  (ii)     if the Final Cash Deferred Income Amount is greater
                           than the Estimated Cash Deferred Income Amount, then
                           the Seller shall pay to the Purchaser by wire
                           transfer of immediately available funds to the
                           Purchaser's Nominated Account an amount equal to the
                           Final Cash Deferred Income Adjustment Amount,
                           together with an amount thereon calculated by
                           reference to the PPA Interest Rate from and including
                           the Closing Date to but not including the date of
                           such payment.

         7.3.4    If the Final Cash Deferred Income Amount is less than either
                  (i)(pound)27,900,000 (twenty seven million, nine hundred
                  thousand pounds Sterling) (if Closing occurs on or prior to 31
                  August 2004, representing the forecast Cash Deferred Income at
                  such date); or (ii)(pound)23,900,000 (twenty three million,
                  nine hundred thousand pounds Sterling) (if Closing occurs on
                  or prior to 30 September 2004 but after 31 August 2004,
                  representing the forecast Cash Deferred Income at such date)
                  then the Final Working Capital Adjustment Amount shall be
                  increased by the difference between the Final Cash Deferred
                  Income Amount (at such date) and either (i)(pound)27,900,000
                  (twenty seven million, nine hundred thousand pounds Sterling)
                  (if Closing occurs on or prior to 31 August 2004); or
                  (ii)(pound)23,900,000 (twenty three million, nine hundred
                  thousand pounds Sterling) (if Closing occurs on or prior to 30
                  September 2004 but after 31 August 2004).

                  For the avoidance of doubt, if the Final Cash Deferred Income
                  Amount is either greater than (i) (pound)27,900,000 (twenty
                  seven million, nine hundred thousand pounds Sterling) (if
                  Closing occurs on or prior to 31 August 2004); or (ii)
                  (pound)23,900,000 (twenty three million, nine hundred thousand
                  pounds Sterling) (if Closing occurs on


                                       24



                  or prior to 30 September 2004 but after 31 August 2004) then
                  there shall be no corresponding adjustment to the Final
                  Working Capital Adjustment Amount.

         7.3.5    The Purchaser agrees that following the Closing and until the
                  Completion Statements become binding pursuant to paragraph 2
                  of Part 1 of Schedule 4, it shall not take any actions with
                  respect to the Books and Records with the result that the
                  Completion Statements cannot be calculated consistent with the
                  Accounting Policies.

         7.3.6    The parties may agree to net the amounts payable pursuant to
                  the foregoing provisions of this Clause 7.3 against each
                  other, such that settlement of the adjustment amounts
                  described herein may be effected by one wire transfer in
                  respect of all such amounts.

7.4      Illustration of Post-Closing Adjustment Mechanisms

         For the avoidance of doubt, set out in Part 5 of Schedule 4 is an
         illustration of the application of the post-Closing adjustment
         mechanisms set out in this Clause 7.

7.5      No Double Counting

         For the avoidance of doubt, no item included in the determination of
         the Completion Statements, shall be taken into account for the purposes
         of the post-Closing adjustment in this Clause 7 in more than one of
         either the Working Capital Statement, the Cash Deferred Income Amount
         Statement or the Cash Amount Statement.

7.6      Fixed Assets Re-allocation

         For the avoidance of doubt and solely for the purposes of this Clause
         7, (i) accounts included in fixed assets in the March Balance Sheet
         shall not be reallocated to balances included within the Closing
         Working Capital Assets; and (ii) accounts included in Current Assets in
         the March Balance Sheet shall not be reallocated to asset balances not
         included within Closing Working Capital Assets.

7.7      Creditors Re-allocation

         For the avoidance of doubt and solely for the purposes of this Clause
         7, (i) any accounts due to creditors classified within the Base Working
         Capital Liabilities in the March Balance Sheet shall not be
         reclassified as creditors falling due after more than 12 months in the
         Closing Date Balance Sheet; and (ii) accounts due to creditors falling
         due after more than 12 months shall not be reclassified within Closing
         Working Capital Liabilities.

8        Warranties

8.1      The Seller's Warranties

         8.1.1    Subject to Clause 8.2, the Seller warrants to the Purchaser
                  that the statements set out in Schedule 5 are true and
                  accurate and not misleading as of the date of this Agreement.

         8.1.2    The Seller acknowledges that the Purchaser has entered into
                  this Agreement in reliance upon the Seller's Warranties.


                                       25



         8.1.3    Each of the Seller's Warranties shall be separate and
                  independent and shall not be limited by reference to any other
                  paragraph of Schedule 5 or by anything in this Agreement.

         8.1.4    Any Seller's Warranty qualified by the expression "the
                  Seller's knowledge", "the Seller becomes aware" or any similar
                  expression shall, unless otherwise stated, be deemed to refer
                  to the knowledge of the persons whose names are set out in
                  Schedule 8.

8.2      Seller's Disclosures

         The Seller's Warranties are subject to and qualified by the matters
         which are fairly disclosed in the Disclosure Letter and "fairly" means
         disclosed in such sufficient detail to enable a reasonable purchaser to
         assess the matter in question. For the avoidance of doubt, nothing
         disclosed in the Disclosure Letter shall prevent the Purchaser from
         making a claim under Clause 14 (Tax Indemnity) and Clause 16
         (Environmental Indemnity).

8.3      Seller's Notification of Breach

         8.3.1    If, after the signing of this Agreement, the Seller shall
                  become aware of any material breach of the Seller's
                  Warranties, the Seller shall promptly give Notice to the
                  Purchaser and in any event prior to Closing setting out full
                  details of the matter.

         8.3.2    Any notification pursuant to Clause 8.3.1 shall not operate as
                  a disclosure pursuant to Clause 8.2 of this Agreement and the
                  Seller's Warranties shall not be subject to such notification.

         8.3.3    For the avoidance of doubt, no breach of this Clause 8.3 shall
                  result in the Purchaser being entitled to rescind or terminate
                  this Agreement.

8.4      The Seller's Waiver of Rights against the Group

         Save in the case of fraud, wilful misrepresentation, wilful misconduct
         or wilful concealment, the Seller undertakes to the Purchaser for
         itself and as trustee for the Group Companies and their respective
         directors, officers and agents and to the Relevant Employees to waive
         any rights, remedies or claims which it may have against any Relevant
         Employee in respect of any misrepresentation, inaccuracy or omission in
         or from any information or advice supplied or given by the Group
         Companies or their respective directors, officers or agents or the
         Relevant Employees in connection with assisting the Seller in the
         giving of any Warranty, any indemnities or the preparation of the
         Disclosure Letter.

8.5      Purchaser's Warranties

         8.5.1    The Purchaser warrants to the Seller that the statements set
                  out in Schedule 6 are true and accurate and not misleading as
                  of the date of this Agreement.

         8.5.2    The Purchaser acknowledges that the Seller has entered into
                  this Agreement in reliance upon the Purchaser's Warranties.

         8.5.3    Each of the Purchaser's Warranties shall be separate and
                  independent and shall not be limited by reference to any other
                  paragraph of Schedule 6 or by anything in this Agreement.


                                       26



8.6      Purchaser's Notification of Breach

         8.6.1    If, after the signing of this Agreement, the Purchaser shall
                  become aware of any material breach of the Purchaser's
                  Warranties, the Purchaser shall promptly give Notice to the
                  Seller and in any event prior to Closing setting out full
                  details of the matter.

         8.6.2    For the avoidance of doubt, no breach of this Clause 8.6 shall
                  result in the Seller being entitled to rescind or terminate
                  this Agreement.

8.7      Guarantor's Warranties

         8.7.1    The Guarantor warrants to the Seller that the statements set
                  out in Schedule 7 are true, accurate and not misleading as of
                  the date of this Agreement.

         8.7.2    The Guarantor acknowledges that the Seller has entered into
                  this Agreement in reliance upon the Guarantor's Warranties.

         8.7.3    Each of the Guarantor's Warranties shall be separate and
                  independent and shall not be limited by reference to any other
                  paragraph of Schedule 7 or by anything in this Agreement.

8.8      Guarantor's Notification of Breach

         8.8.1    If, after the signing of this Agreement, the Guarantor shall
                  become aware of any material breach of the Guarantor's
                  Warranties, the Guarantor shall promptly give Notice to the
                  Seller and in any event prior to Closing setting out full
                  details of the matter.

         8.8.2    For the avoidance of doubt, no breach of this Clause 8.8 shall
                  result in the Seller being entitled to rescind or terminate
                  this Agreement.

8.9      Effect of Closing

         The Seller's Warranties, the Purchaser's Warranties and the Guarantor's
         Warranties and all other provisions of this Agreement, to the extent
         that they have not been performed by Closing, shall not be extinguished
         or affected by Closing or by any other event or matter (including,
         without limitation, any satisfaction and/or waiver of any condition
         contained in Clause 4.1), except by a specific and duly authorised
         written waiver or release by the Purchaser or the Seller, as the case
         may be.

9        Limitation of  Liability

9.1      Time Limitation for Claims

         9.1.1    The Seller shall not be liable for breach of any Seller's
                  Warranty or to make a payment under any indemnity or related
                  provision or a claim under Clause 14 (Tax Indemnity) unless a
                  notice of the claim is given by the Purchaser to the Seller:

                  (i)      in the case of any claim under Clause 14 (Tax
                           Indemnity) or the Tax Warranties within seven years
                           following Closing;

                  (ii)     in the case of any claim under Clause 16
                           (Environmental Indemnity) or paragraph 9 of Schedule
                           5 (environmental warranties), within four years
                           following Closing; and

                  (iii)    in the case of any other claim, by 31 May 2006,


                                       27



                  except that there shall be no time limitation for giving
                  notice of any claim under paragraphs 1.1.1 to 1.1.6 or 15 of
                  Schedule 5. Any claim notified by the Purchaser to the
                  Seller pursuant to this Clause shall specify the matters set
                  out in Clause 10.1.

         9.1.2    The Purchaser shall not be liable for breach of any
                  Purchaser's Warranty or to make a payment under any indemnity
                  in respect of any claim unless a notice of the claim is given
                  by the Seller to the Purchaser:

                  (i)      in the case of any claim under Clause 14 (Tax
                           Indemnity) or paragraph 5 of Schedule 6, within seven
                           years following Closing; and

                  (ii)     in the case of any other claim, by 31 May 2006,

                  except that there shall be no time limitation for giving
                  notice of any claim under paragraph 1 of Schedule 6. Any claim
                  notified by the Purchaser to the Seller pursuant to this
                  Clause shall specify the matters set out in Clause 10.1.

9.2      Minimum Claims

         9.2.1    Purchaser Claims

                  (i)      The Seller shall not be liable for breach of any
                           Seller's Warranty nor to make a payment under Clause
                           16 (Environmental Indemnity) in respect of any
                           individual claim (or a series of claims arising from
                           substantially similar facts or circumstances) where
                           the liability agreed or determined (disregarding the
                           provisions of this Clause 9.2) in respect of any such
                           claim or series of claims does not exceed
                           (pound)100,000 (one hundred thousand pounds Sterling)
                           and such claims shall not be aggregated for the
                           purposes of Clause 9.3.1.

                  (ii)     Where the Liability agreed or determined in respect
                           of any such claim or a series of claims arising from
                           substantially similar facts or circumstances exceeds
                           (pound)100,000 (one hundred thousand pounds
                           Sterling), subject as provided elsewhere in this
                           Clause 9, the Seller shall be liable for the amount
                           of the claim or series of claims as agreed or
                           determined.

         9.2.2    Seller Claims

                  (i)      The Purchaser shall not be liable for breach of any
                           Purchaser's Warranty in respect of any individual
                           claim (or a series of claims arising from
                           substantially similar facts or circumstances) where
                           the liability agreed or determined (disregarding the
                           provisions of this Clause 9.2) in respect of any such
                           claim or series of claims does not exceed
                           (pound)100,000 (one hundred thousand pounds Sterling)
                           and such claims shall not be aggregated for the
                           purposes of Clause 9.3.2.

                  (ii)     Where the Liability agreed or determined in respect
                           of any such claim or a series of claims arising from
                           substantially similar facts or circumstances exceeds
                           (pound)100,000 (one hundred thousand pounds
                           Sterling), subject as provided elsewhere in this
                           Clause 9, the Purchaser shall be liable for the
                           amount of the claim or series of claims as agreed or
                           determined.


                                       28



9.3      Aggregate Minimum Claims

         9.3.1    Purchaser Claims

                  (i)      The Seller shall not be liable for breach of any
                           Seller's Warranty in respect of any claim unless the
                           aggregate amount of all claims for which the Seller
                           would otherwise be liable for breach of any Seller's
                           Warranty (but not including any amounts recovered by
                           the Purchaser pursuant to a payment made either under
                           Clause 16 (Environmental Indemnity) or under Clause
                           14 (Tax Indemnity)) (disregarding the provisions of
                           this Clause 9.3) exceeds (pound)12,500,000 (twelve
                           million, five hundred thousand pounds Sterling).

                  (ii)     Where the Liability agreed or determined in respect
                           of all claims referred to in Clause 9.3.1 exceeds
                           (pound)12,500,000 (twelve million, five hundred
                           thousand pounds Sterling) subject as provided
                           elsewhere in this Clause 9, the Seller shall be
                           liable for the aggregate amount of all claims as
                           agreed or determined.

         9.3.2    Seller Claims

                  (i)      The Purchaser shall not be liable for breach of any
                           Purchaser's Warranty in respect of any claim unless
                           the aggregate amount of all claims for which the
                           Purchaser would otherwise be liable for breach of any
                           Purchaser's Warranty (disregarding the provisions of
                           this Clause 9.3) exceeds (pound)12,500,000 (twelve
                           million, five hundred thousand pounds Sterling).

                  (ii)     Where the Liability agreed or determined in respect
                           of all claims referred to in Clause 9.3.2 exceeds
                           (pound)12,500,000 (twelve million, five hundred
                           thousand pounds Sterling) subject as provided
                           elsewhere in this Clause 9, the Purchaser shall be
                           liable for the aggregate amount of all claims as
                           agreed or determined.

9.4      Maximum Liability

         9.4.1    Purchaser Claims

                  (i)      The aggregate liability of the Seller in respect of
                           all claims under the Seller's Warranties and Clause
                           14 (Tax Indemnity) shall not exceed an amount equal
                           to 80 (eighty) per cent. of the Closing Amount, after
                           adjustment thereto pursuant to Clause 7.

                  (ii)     The aggregate liability of the Seller in respect of
                           all claims under Clause 16 (Environmental Indemnity)
                           shall not exceed an amount equal to (pound)55,000,000
                           (fifty five million pounds Sterling).

                  (iii)    The foregoing provisions of this Clause 9.4.1 shall
                           not apply with respect to any losses arising out of
                           any breach of the Seller's Warranties set out under
                           paragraphs 1.1 and 15 of Schedule 5.


                                       29



         9.4.2    Seller Claims

                  (i)      The aggregate liability of the Purchaser in respect
                           of all claims under the Purchaser's Warranties shall
                           not exceed an amount equal to 80 (eighty) per cent.
                           of the Closing Amount, after adjustment thereto
                           pursuant to Clause 7.

                  (ii)     The foregoing provisions of this Clause 9.4.2 shall
                           not apply with respect to any losses arising out of
                           any breach of the Seller's Warranties set out under
                           paragraph 1 of Schedule 6.

         9.4.3    For the avoidance of doubt, the aggregate liabilities set out
                  in Clauses 9.4.1 and 9.4.2 above shall not be subject to any
                  adjustment as a result of a reduction of consideration
                  pursuant to Clause 3.2.

9.5      Provisions

         The Seller shall not be liable for breach of any Seller's Warranty in
         respect of any claim pursuant thereto or pursuant to Clause 16
         (Environmental Indemnity) if and to the extent that proper allowance,
         provisions or reserve is specifically made in the Accounts or Working
         Capital Statement for the matter giving rise to the claim.

9.6      Matters Arising Subsequent to this Agreement

         Neither party shall be liable for breach of any Warranty or indemnity
         other than a claim under Clause 14 (Tax Indemnity) in respect of any
         matter to the extent that the same would not have occurred but for:

         9.6.1    Agreed matters

                  any matter or thing done or omitted to be done pursuant to and
                  in compliance with this Agreement or otherwise at the request
                  in writing or with the approval in writing of the other party;

         9.6.2    Changes in Law

                  (i)      the passing of, or any change in, after Closing, any
                           Law or administrative practice of any Governmental
                           Entity, government, governmental department, agency
                           or regulatory body including (without prejudice to
                           the generality of the foregoing) any increase in the
                           rates of Taxation or any imposition of Taxation or
                           any withdrawal of relief from Taxation not actually
                           (or prospectively) in effect as at Closing; or

                  (ii)     any change after Closing of any generally accepted
                           interpretation or application of any Law; or

         9.6.3    Change in Accounting and Taxation Policies subsequent to this
                  Agreement

                  the breach of any Seller's Warranty (other than a Tax
                  Warranty) in respect of any matter to the extent that the same
                  would not have occurred but for any change in accounting or
                  Taxation policy, bases or practice of the Purchaser or any of
                  the Group Companies introduced or having effect after Closing.

9.7      Recovery from Third Parties

         9.7.1    If the Seller has paid or the Purchaser requires payment of an
                  amount in discharge of any claim for breach of Warranty (other
                  than a Tax Warranty) or Clause 16 (Environmental Indemnity)
                  and the Purchaser or any Group Company is entitled to


                                       30



                  recover (whether by payment, discount, credit, relief,
                  insurance or otherwise) from a third party a sum which
                  indemnifies or compensates the Purchaser or Group Company (in
                  whole or in part) in respect of the Loss or Liability which is
                  the subject matter of the claim, the Purchaser or relevant
                  Group Company shall take all reasonable steps to recover such
                  amount and where the Seller has paid an amount in discharge of
                  a claim, pay to the Seller as soon as practicable after
                  receipt an amount equal to (i) any sum recovered from the
                  third party less any costs and expenses incurred in obtaining
                  such recovery less any Taxation attributable to the recovery
                  after taking account of any Relief (other than a Purchaser's
                  Relief or a Post-Closing Relief) available in respect of any
                  matter giving rise to the claim or if less (ii) the amount
                  previously paid by the Seller to the Purchaser less any
                  Taxation attributable to it.

         9.7.2    If the Purchaser or any Group Company has paid or the Seller
                  requires payment of an amount in discharge of any claim for
                  breach of Warranty and the Seller is entitled to recover
                  (whether by payment, discount, credit, relief, insurance or
                  otherwise) from a third party a sum which indemnifies or
                  compensates the Seller (in whole or in part) in respect of the
                  loss or liability which is the subject matter of the claim,
                  the Seller shall take all reasonable steps to recover such
                  amount and where the Purchaser or any Group Company has paid
                  an amount in discharge of a claim, pay to the Purchaser or the
                  relevant Group Company shall, as soon as practicable after
                  receipt an amount equal to (i) any sum recovered from the
                  third party less any costs and expenses incurred in obtaining
                  such recovery less any Taxation attributable to the recovery
                  after taking account of any Tax relief available in respect of
                  any matter giving rise to the claim or if less (ii) the amount
                  previously paid by the Purchaser or any Group Company to the
                  Seller less any Taxation attributable to it.

9.8      Mitigation of Losses, No Duplication of Liability and No Consequential
         or Special Damages

         9.8.1    The parties shall procure that all reasonable steps are taken
                  and all reasonable assistance is given to avoid or mitigate
                  any Losses which in the absence of mitigation might give rise
                  to a Liability in respect of any claim for breach of any
                  Seller's Warranty.

         9.8.2    The Purchaser agrees for itself and on behalf of every Group
                  Company with the Seller in respect of any matter which may
                  give rise to a Liability under this Agreement:

                  (i)      no such Liability shall be met more than once;

                  (ii)     to the extent that such Liability is satisfied by way
                           of a claim under any Warranty, an amount payable
                           under Clause 14 (Tax Indemnity) or Clause 16
                           (Environmental Indemnity) in respect of the same
                           matter shall be reduced accordingly, and vice versa;
                           and

                  (iii)    any Liability with respect to such matter to any
                           member of the Purchaser's Group or any Group Company
                           shall be deemed to be satisfied by the satisfaction
                           of the Liability in respect of such matter to any
                           other of them.


                                       31



         To the extent that a party shall have any Liability pursuant to a claim
         hereunder, such Liability shall not include consequential, special,
         punitive, incidental or indirect damages (and the injured party shall
         not recover for such amounts).

9.9      No Right of Set-Off

         The parties acknowledge and agree that neither the Seller nor the
         Purchaser may set off or apply any portion of amounts claimed by it in
         respect of any breach of warranty or indemnification obligation arising
         pursuant to this Agreement against monies payable to the other pursuant
         to Clause 6, Clause 7 or Clause 17.

9.10     Fraud

         None of the limitations contained in this Clause 9 shall apply to any
         claim which arises or is increased, or to the extent to which it arises
         or is increased, as the consequence of, or which is delayed as a result
         of, fraud, wilful misconduct, wilful concealment or gross negligence by
         (i) the Seller or before Closing, any Group Company (including in each
         case, any of their respective directors, officers, employees or agents)
         in the case of a claim by the Purchaser, or (ii) by the Purchaser
         (including any of its directors, officers, employees or agents) in the
         case of a claim by the Seller.

10       Claims

10.1     Notification of Claims under this Agreement

         Notices of claims for breach of any Warranty or any other claim under
         this Agreement shall be promptly given by the claiming party to the
         other party, subject to the time limits specified in Clause 9.1 within
         60 days of the claiming party's determination of such claim and, in the
         case of the Environmental Indemnity, within the time period specified
         in Clause 16. Such notice shall state the amount of the Loss, if known,
         and the method of the computation thereof and, specifying in reasonable
         detail the legal and factual basis of the claim and the evidence on
         which the claiming party relies.

10.2     Conduct of Third Party Claims

         If the matter or circumstance that may give rise to a claim against a
         party for breach of any Warranty is a result of or in connection with a
         claim by or Liability to a third party then the Purchaser or other
         member of the Purchaser's Group in the case of a potential claim
         against the Seller or other member of the Seller's Group, or the
         Seller, in the case of a potential claim against the Purchaser or other
         member of the Purchaser's Group shall be required to take such action
         as shall be reasonably necessary to avoid, dispute, deny, defend,
         resist, appeal, compromise or contest such claim or Liability
         (including, without limitation, making counterclaims or other claims
         against third parties) and shall, so far as practicable, without
         prejudice to the rights of its insurers, consult with the other party
         before taking any such action.

11       Restrictions on the Seller

11.1     Non-competition

         The Seller agrees that for a period of 36 months commencing on the
         Closing Date (the "Non-compete Period"), the Seller shall not, and
         shall not permit any of its controlled


                                       32



         subsidiaries (whilst they remain so) to, engage in any of the following
         activities (the "Competitive Activities") within the British Isles:

         11.1.1   owning, operating, providing, offering or managing television
                  and radio broadcast transmission and distribution networks or
                  services;

         11.1.2   providing space and associated services on sites to
                  communication service providers for the installation of
                  wireless telecommunications equipment and associated
                  equipment;

         11.1.3   providing or offering to provide site acquisition, site
                  development and antenna installation services; and

         11.1.4   operating any services that use radio spectrum, where the
                  Seller or any of its Subsidiaries holds one or more radio
                  frequency licence(s) for such purposes.

11.2     Notwithstanding anything in Clause 11.1 to the contrary, the Purchaser
         hereby agrees that the foregoing covenant shall not be deemed breached
         either (i) as a result of the ownership by the Seller or any of its
         controlled subsidiaries (whilst they remain so) of (A) less than an
         aggregate of 5% of any class of stock of a person engaged in
         Competitive Activities, (B) less than the lesser of (x) 20% or (y)
         $100,000,000 (one hundred million Dollars) in value of any instrument
         of Indebtedness of a person or business engaged in Competitive
         Activities, (C) a person or business engaged in Competitive Activities
         if the portion of the revenues of such person and its subsidiaries on a
         consolidated basis or business for the financial year ending
         immediately prior to the time of such acquisition that is attributable
         to Competitive Activities accounts for less than the lesser of (x) 20%
         or (y) $100,000,000 (one hundred million Dollars) of such person's or
         business' consolidated annual revenues, or (D) a person or business
         engaged in Competitive Activities if such Competitive Activities
         account for greater than (x) 20% or (y) $100,000,000 (one hundred
         million Dollars) of such person's or business' consolidated annual
         revenues for the financial year immediately prior to the time of such
         acquisition; provided that the Seller or such subsidiary, as the case
         may be, uses its reasonable endeavours to sell, transfer or otherwise
         dispose of a portion of the person or business that conducts
         Competitive Activities within one year after the date on which the
         acquisition of such person or business is consummated so that,
         following such sale, transfer or disposition, the Seller or such
         subsidiary is in compliance with Clause 11.2(C) (it being acknowledged
         and agreed by (a) the Seller that, in marketing such business for sale,
         the Seller shall ensure that the Purchaser is offered a reasonable
         opportunity to purchase such business and (b) the Purchaser that, if
         the Seller or such subsidiary is unable to divest the requisite portion
         of the acquired person's or business' within such one year time period,
         the Seller or such subsidiary may retain ownership of the person or
         business conducting the Competitive Activities with no obligation to
         the Purchaser); or (ii) as a result of any transaction announced, or
         entered into, by the Seller or any of its controlled subsidiaries, with
         a person engaged in Competitive Activities that results in a Seller
         Change of Control which takes effect not less than 18 months after the
         Closing Date.

11.3     Notwithstanding anything in Clause 11.1 to the contrary, the Seller and
         its controlled subsidiaries shall have the right to engage in any
         Competitive Activities at any time after a Company Change of Control.


                                       33



11.4     Non-solicitation

         During the Non-compete Period, the Seller shall not, and shall not
         permit any of its controlled subsidiaries (whilst they remain so) to,
         (i) recruit, employ or solicit for hire any person employed by the
         Company or any Group Company on the Closing Date or any executive
         officer employed by the Company or any Group Company at any time during
         the Non-compete Period; or (ii) encourage or participate in such
         recruitment or solicitation; provided that nothing in this Clause 11.4
         shall be interpreted as applying to such an employee who either
         responds to a public advertisement or a general search for employees
         (through media advertisements, employment firms or otherwise) which is
         not focused at employees of the Group or who is no longer an employee
         of a Group Company when either such individual first approached or was
         first approached by the Seller or any of its controlled subsidiaries.

11.5     Reasonable Restrictions

         The Seller agrees that the restrictions contained in this Clause 11 are
         no greater than is reasonable and necessary for the protection of the
         interests of the Purchaser and the Group Companies but if any such
         restriction shall be held to be void but would be valid if deleted in
         part or reduced in application, such restriction shall apply with such
         deletion or modification as may be necessary to make it valid and
         enforceable.

12       Confidentiality

12.1     Announcements

         No public release, announcement or circular in connection with the
         existence or the subject matter of this Agreement shall be made or
         issued by or on behalf of the Seller or the Purchaser without the prior
         written approval of the other party, such approval not to be
         unreasonably withheld or delayed. This shall not affect any public
         release announcement or circular to the extent required by applicable
         law or any government entity or the rules of any recognised stock
         exchange on which the shares of either party are listed but the party
         with an obligation to make an announcement or issue a circular shall
         allow the other party insofar as is reasonably practicable to comment
         on such public release, announcement or circular before complying with
         such an obligation.

12.2     Confidentiality

         12.2.1   The Confidentiality Agreement shall cease to have any force or
                  effect from the date of this Agreement.

         12.2.2   Subject to Clause 12.1 and Clause 12.2.3:

                  (i)      each of the parties shall treat as strictly
                           confidential and not disclose or use any information
                           received or obtained as a result of entering into
                           this Agreement (or any agreement entered into
                           pursuant to this Agreement) which relates to:

                           (a)      the provisions of this Agreement and any
                                    agreement entered into pursuant to this
                                    Agreement; or


                                       34



                           (b)      the negotiations relating to this Agreement
                                    (and any such other agreements);

                  (ii)     the Seller shall treat as strictly confidential and
                           not disclose or use any information relating to the
                           Group Companies following Closing and any other
                           information relating to the business, financial or
                           other affairs (including future plans and targets) of
                           the Purchaser's Group; and

                  (iii)    the Purchaser and the Guarantor shall treat as
                           strictly confidential and not disclose or use any
                           information relating to the business, financial or
                           other affairs (including future plans and targets) of
                           the Seller's Group including, prior to Closing, the
                           Group Companies.

         12.2.3   Clause 12.2.2 shall not prohibit disclosure or use of any
                  information if and to the extent:

                  (i)      the disclosure or use is required by applicable law,
                           any governmental entity or any recognised stock
                           exchange;

                  (ii)     the disclosure or use is required to vest the full
                           benefit of this Agreement in the Seller, the
                           Purchaser, or the Guarantor, as the case may be;

                  (iii)    the disclosure or use is required for the purpose of
                           any judicial proceedings arising out of this
                           Agreement or any other agreement entered into under
                           or pursuant to this Agreement or the disclosure is
                           made to a Tax Authority in connection with the Tax
                           affairs of the disclosing party;

                  (iv)     the disclosure is made to Representatives of the
                           Seller or the Purchaser on terms that such
                           Representatives undertake to comply with the
                           provisions of Clause 12.2.2 in respect of such
                           information as if they were a party to this
                           Agreement;

                  (v)      the information is or becomes publicly available
                           (other than by breach of the Confidentiality
                           Agreement or of this Agreement);

                  (vi)     the other parties have given prior written approval
                           for the disclosure or use; or

                  (vii)    the information is independently developed after
                           Closing,

                  provided that prior to disclosure or use of any information
                  pursuant to Clause 12.2.3(i), (ii) or (iii), except in the
                  case of disclosure to a Tax Authority, the party concerned
                  shall promptly notify the other parties of such requirement
                  with a view to providing that other parties with the
                  opportunity to contest such disclosure or use or otherwise to
                  agree on the timing and content of such disclosure or use.

13       Other Provisions

13.1     Access

         After Closing, the Purchaser will give the Seller and its
         Representatives reasonable access, during normal business hours and
         upon reasonable notice, to all relevant Books and Records, agreements,
         documents, information, data and files to the extent relating to the
         Seller's operation of the Group Companies prior to Closing, and to
         furnish copies thereof at the cost of the Seller, which the Seller or
         its Representatives reasonably request, in connection with claims,
         proceedings, actions, investigations, audits, and other regulatory


                                       35



         or legal proceedings involving the Seller's operation of the Group
         Companies prior to Closing, other than claims made pursuant to this
         Agreement or in relation to matters, in the Purchaser's reasonable
         opinion, likely to give rise to such claims, and the Purchaser shall
         furnish reasonable assistance (including access to management and
         employees of Crown Castle UK) to the Seller and its Representatives in
         connection with assessing such claims and other proceedings; provided
         that such access would not unreasonably disrupt the normal operations
         of the Purchaser or the Group Companies or compromise any legal
         privilege of the Purchaser or the Group. The Purchaser shall use
         reasonable endeavours to ensure the preservation of any such records
         (including Tax records) until the seventh anniversary of Closing;
         provided, further, that the Purchaser will use reasonable endeavours to
         prevent the destruction of any such records without first providing the
         Seller with written notice detailing the contents of such records and
         the opportunity to obtain such records, at least 30 days prior to the
         destruction thereof.

13.2     Retained Names and Marks

         13.2.1   Subject to the terms of this Clause 13.2, no interest in or
                  right to use the names "Crown", "Castle", "Crown Castle",
                  "CCIC" or "CCUK" or the Seller or Company logos set out in
                  Schedule 2 (collectively, but not including the name "UK" when
                  used other than in conjunction with "Crown", "Castle", "Crown
                  Castle", "CCIC" or "CCUK", (the "Retained Names and Marks"))
                  is being transferred to the Purchaser pursuant to the
                  transactions contemplated by this Agreement or will be
                  retained by the Group Companies after the Closing Date.

         13.2.2   Pursuant to the TM Licence Agreement to be entered into by the
                  Seller and the Purchaser or their respective Affiliates on
                  Closing, for a period of 18 months after the Closing Date, the
                  Seller shall grant to the Group Companies the right to use
                  solely within the British Isles any Retained Name and Mark (i)
                  in the ordinary course of its business and consistent with
                  past practice provided that, in the use of the Retained Names
                  and Marks after the Closing Date, the Purchaser shall procure
                  that, to the extent reasonably practicable, the Group
                  Companies clearly state that such names and marks are used and
                  such business operated by the Purchaser's Group; and (ii) on
                  any business assets, signage, billboards, advertising
                  materials, telephone listings, internet sites, stationery,
                  purchase orders, invoices, sales orders, labels, letterheads,
                  shipping documents, and other items and materials in existence
                  at the Closing Date.

         13.2.3   All goodwill resulting from the use by the Group Companies of
                  the Retained Names and Marks pursuant to this Clause 13.2
                  shall inure to the benefit of the Seller.

         13.2.4   From the date 18 months following the Closing Date (the "TM
                  Termination Date"), all rights acquired by the Group Companies
                  pursuant to this Clause 13.2 shall terminate and the Purchaser
                  shall, or shall cause the Group Companies to, cease all use of
                  the Retained Names and Marks including removing by the TM
                  Termination Date the Retained Names and Marks from its signs,
                  billboards, advertising materials, telephone listings,
                  Internet sites, stationery, purchase orders, invoices, sales
                  orders, labels, letterheads, shipping documents, and other
                  similar items and materials.

         13.2.5   From the TM Termination Date, neither the Purchaser nor any of
                  its Affiliates shall have a corporate name or conduct a
                  business with a name incorporating the Retained Names and
                  Marks or anything derived from or confusingly similar thereto.


                                       36



         13.2.6   The Purchaser agrees to use reasonable endeavours to do such
                  things as the Seller shall reasonably request to prevent
                  confusion in the marketplace or otherwise in connection with
                  the Purchaser's use of the Retained Names and Marks pursuant
                  to this Clause 13.2.

13.3     Intercompany Arrangements

         13.3.1   The Seller covenants that, except as set out in Section 6.4 of
                  the Disclosure Letter and subject to Clause 17, (i) no
                  Intra-Group Payables and (ii) no Intra-Group Receivables shall
                  exist or be outstanding as at Closing. The Seller undertakes
                  to the Purchaser to be solely responsible for any penalties,
                  charges or fees (including any prepayment charges) in respect
                  of any such Intra-Group Receivables or Intra-Group Payables.

         13.3.2   Except for agreements set out in Section 6.4 of the Disclosure
                  Letter and any agreements entered into pursuant to this
                  Agreement, as at Closing, all contracts between the Group
                  Companies, on the one hand, and the Seller or any of its
                  Subsidiaries (other than the Group Companies), on the other
                  hand, shall have been terminated and be of no further force or
                  effect, notwithstanding any terms thereof to the contrary.

13.4     Transitional Arrangements

         On Closing, the parties or their respective Affiliates shall enter into
         the Transitional Services Agreement.

13.5     Jersey Telecoms Licence

         Promptly after the date of this Agreement, the Seller shall notify the
         Jersey Competition Regulatory Authority (in accordance with condition
         2.5 of the Class 1 telecommunications licence issued to the Company on
         22 June 2004) that a Change of Control (as defined in such licence) is
         proposed.

13.6     Further Assurances

         13.6.1   Each of the Seller and the Purchaser shall, and shall use
                  reasonable endeavours to procure that any necessary third
                  party shall, from time to time execute such documents and
                  perform such acts and things as either of the Seller or the
                  Purchaser may reasonably require to transfer or procure the
                  transfer of the Shares to the Purchaser and to give each of
                  them the full benefit of this Agreement.

         13.6.2   Pending registration of the Purchaser as owner of the Shares,
                  the Seller shall exercise all voting and other rights in
                  relation to such Shares in accordance with the Purchaser's
                  instructions.

         13.6.3   Release of Guarantees

                  The Seller shall procure, by Closing or, to the extent not
                  done by Closing, within 10 Business Days thereafter, or, to
                  the extent not done within such period, as soon as reasonably
                  practicable thereafter, the release of each Group Company from
                  any securities, pledges, guaranties or indemnities given by or
                  binding upon the Group Company in respect of any Liability of
                  the Seller or any member of the Seller's Group. Pending such
                  release, the Seller shall indemnify the Group Companies


                                       37



                  against all amounts paid by any of them pursuant to any such
                  securities, pledges, guarantees and indemnities in respect of
                  such Liability of the Seller.

13.7     Whole Agreement

         13.7.1   This Agreement contains the whole agreement between the
                  Seller, the Purchaser and the Guarantor relating to the
                  subject matter of this Agreement at the date of this Agreement
                  to the exclusion of any terms implied by Law which may be
                  excluded by contract and supersedes any previous written or
                  oral agreement between the Seller, the Purchaser and the
                  Guarantor in relation to the matters dealt with in this
                  Agreement.

         13.7.2   Each party acknowledges that it has not been induced to enter
                  this Agreement by any representation, warranty or undertaking
                  not expressly incorporated into it.

         13.7.3   So far as is permitted by Law and except in the case of fraud,
                  each of the Seller, the Purchaser and the Guarantor agrees and
                  acknowledges that its only right and remedy in relation to any
                  representation, warranty or undertaking made or given in
                  connection with this Agreement shall be for breach of the
                  terms of this Agreement to the exclusion of all other rights
                  and remedies (including those in tort or arising under
                  statute).

         13.7.4   In Clauses 13.7.1 to 13.7.3, "this Agreement" includes the
                  Disclosure Letter and all documents entered into pursuant to
                  this Agreement.

13.8     Reasonableness

         Each of the Seller, the Purchaser and the Guarantor confirms it has
         received independent legal advice relating to all the matters provided
         for in this Agreement, including the terms of Clause 11 (Restrictions
         on the Seller) and Clause 13.7 (Whole Agreement) and agrees that the
         provisions of this Agreement (including the Disclosure Letter and all
         documents entered into pursuant to this Agreement) are fair and
         reasonable.

13.9     Assignment

         13.9.1   Except as otherwise expressly provided in this Agreement,
                  neither the Seller, the Purchaser nor the Guarantor may
                  without the prior written consent of the others, assign, grant
                  any security interest over, hold on trust or otherwise
                  transfer the benefit of the whole or any part of this
                  Agreement.

         13.9.2   Except as otherwise expressly provided in this Agreement, the
                  Seller or the Purchaser may, without the consent of the other,
                  assign to a connected company the benefit of the whole or any
                  part of this Agreement provided that:

                  (i)      such assignment shall not be absolute but shall be
                           expressed to have effect only for so long as the
                           assignee remains a connected company of the party
                           concerned, with an obligation to re-assign to a
                           connected company of the assignor should any assignee
                           cease to be so; and

                  (ii)     the assignee shall not be entitled to receive under
                           this Agreement any greater amount than that to which
                           the assignor would have been entitled.

                  For the purposes of this Clause, a "connected company" is a
                  company which is a subsidiary of the party concerned or which
                  is a holding company of such party or a subsidiary of such
                  holding company.


                                       38



13.10    Third Party Rights

         13.10.1  A person who is not a party to this Agreement has no right
                  under the Contracts (Rights of Third Parties) Act 1999 to
                  enforce any term of, or enjoy any benefit under, this
                  Agreement, except to the extent set out in this Clause 13.10.

         13.10.2  A Group Company (whilst the Group Company remains in the
                  Purchaser's Group) may enforce and rely on Clause 8.4 to the
                  same extent as if it were a party.

         13.10.3  This Agreement may be terminated and any term may be amended
                  or waived without the consent of the person named in Clause
                  13.10.2.

13.11    Variation

         No variation of this Agreement shall be effective unless in writing and
         signed by or on behalf of each of the Seller, the Purchaser and the
         Guarantor.

13.12    Time of the Essence

         Time shall be of the essence of this Agreement both as regards any
         dates, times and periods mentioned and as regards any dates, times and
         periods which may be substituted for them in accordance with this
         Agreement or by agreement in writing between the Seller, the Purchaser
         and the Guarantor.

13.13    Method of Payment

         Wherever in this Agreement provision is made for the payment by one
         party to another, such payment shall be effected by crediting for same
         day value the Seller's Nominated Account or the Purchaser's Nominated
         Account, as applicable, by wire transfer of immediately available
         funds, on or before the due date for payment. Payment of such sum in
         this manner shall be a good discharge to the payer of its obligation to
         make such payment on or before the due date for payment.

13.14    Costs

         13.14.1  The Seller shall bear all costs incurred by it and the
                  Seller's Group in connection with the preparation, negotiation
                  and entry into of this Agreement and the sale of the Shares.

         13.14.2  The Purchaser shall bear all such costs incurred by it in
                  connection with the preparation, negotiation and entry into of
                  this Agreement and the purchase of the Shares.

         13.14.3  The Guarantor shall bear all such costs incurred by it in
                  connection with the preparation, negotiation and entering into
                  of this Agreement.

13.15    Stamp Duty, Fees and Taxes

         The Purchaser shall bear the cost of all stamp duty and all
         registration and transfer taxes and duties or their equivalents in all
         jurisdictions where such fees, Taxes and duties are payable as a result
         of the transactions contemplated by this Agreement. The Purchaser shall
         be responsible for arranging the payment of such stamp duty and all
         other such fees, Taxes and duties, including fulfilling any
         administrative or reporting obligation imposed by the jurisdiction in
         question in connection with the payment of such Taxes and duties. The
         Purchaser shall indemnify the Seller or any other member of the
         Seller's Group against


                                       39



         any Losses suffered by the Seller or member of the Seller's Group as a
         result of the Purchaser failing to comply with its obligations under
         this Clause 13.15.

13.16    Interest

         If the Seller, the Purchaser or the Guarantor defaults in the payment
         when due of any sum payable under this Agreement its liability shall be
         increased to include interest on such sum from the date when such
         payment is due until the date of actual payment (after as well as
         before judgment) at a rate per annum of 4 per cent. above the rate of
         interest from time to time announced publicly by Barclays Bank plc as
         its base rate. Such interest shall accrue from day to day and shall be
         compounded monthly.

13.17    Grossing-up of Indemnity Payments, VAT

         13.17.1  Any payment made under this Agreement pursuant to an
                  indemnity, compensation or reimbursement provision (including,
                  for the avoidance of doubt, any payments in respect of a
                  breach of any Warranty and any payment under Clause 14 (Tax
                  Indemnity)) shall be paid free and clear of all deductions
                  withholdings, set-offs or counterclaims whatsoever save only
                  as may be required by law. If any deductions or withholdings
                  are required by law the party making the payment shall be
                  obliged to pay to the other party such sum as will, after such
                  deduction or withholding has been made, leave the other party
                  with the same amount as it would have been entitled to receive
                  in the absence of any such requirement to make a deduction or
                  withholding.

         13.17.2  If the recipient of a payment made under this Agreement
                  pursuant to an indemnity, compensation or reimbursement
                  provision (including, for the avoidance of doubt, any payments
                  in respect of a breach of any Warranty and any payment under
                  Clause 14 (Tax Indemnity)) receives a credit for or refund of
                  any Taxation payable by it or similar benefit by reason of any
                  deduction or withholding for or on account of Taxation then it
                  shall reimburse to the other party such part of such
                  additional amounts paid to it pursuant to Clause 13.17.1 as
                  will leave it (after such reimbursement) in no better and no
                  worse position than it would have been if the other party had
                  not been required to make such deduction or withholding.

         13.17.3  Where any payment is made under this Agreement to the
                  Purchaser pursuant to an indemnity, compensation or
                  reimbursement provision (including, for the avoidance of
                  doubt, any payments in respect of a breach of any Warranty and
                  any payment under Clause 14 (Tax Indemnity)) and that sum is
                  subject to a charge to Taxation in the hands of the recipient
                  (other than Taxation attributable to a payment being properly
                  treated as an adjustment to the consideration paid by the
                  Purchaser for the Group) the sum payable shall be increased to
                  such sum as will ensure that after payment of such Taxation
                  (and after giving credit for any Taxation Relief available to
                  the recipient in respect of the matter giving rise to the
                  payment) the recipient shall be left with a sum equal to the
                  sum that it would have received in the absence of such a
                  charge to Taxation.

         13.17.4  Where any payment is made under this Agreement pursuant to an
                  indemnity, compensation or reimbursement provision (including,
                  for the avoidance of doubt, any payments in respect of a
                  breach of any Warranty and any payment under Clause 14 (Tax
                  Indemnity)) and the matter giving rise to the payment results
                  in a Taxation Relief being available to any member of the
                  Purchaser's Group the


                                       40



                  amount of that payment shall be reduced to take into account
                  the value of that Taxation Relief.

         13.17.5  Where any sum constituting an indemnity, compensation or
                  reimbursement (including, for the avoidance of doubt, any
                  payments in respect of a breach of any Warranty and any
                  payment under Clause 14 (Tax Indemnity)) to any party to this
                  Agreement is paid to a person other than such party but is
                  treated as taxable in the hands of such party, the payer shall
                  promptly pay to such party such sum as shall reimburse such
                  party for all Taxation suffered by it in respect of the
                  payment (after giving credit for any Taxation Relief available
                  to such party in respect of the matter giving rise to the
                  payment).

         13.17.6  Where under the terms of this Agreement one party is liable to
                  indemnify or reimburse another party in respect of any costs,
                  charges or expenses, the payment shall include an amount equal
                  to any VAT thereon not otherwise recoverable by the other
                  party, subject to that other party using all reasonable
                  endeavours to recover such amount of VAT as may be
                  practicable.

         13.17.7  If any payment under this Agreement constitutes the
                  consideration for a taxable supply for VAT purposes, then in
                  addition to that payment, and against delivery of a valid VAT
                  invoice, the payer shall pay any VAT due.

13.18    Notices

         13.18.1  Any notice or other communication in connection with this
                  Agreement (each, a "Notice") shall be:

                  (i)      in writing; and

                  (ii)     delivered by hand, pre-paid first class post or
                           courier using an internationally recognised courier
                           company.

         13.18.2  A Notice to the Seller shall be sent to the following address,
                  or such other person or address as the Seller may notify to
                  the Purchaser and the Guarantor from time to time:

                  Crown Castle International Corp.
                  510 Bering Drive
                  Suite 500
                  Houston
                  Texas 77057
                  Attention: E. Blake Hawk, General Counsel

                  with a copy to:

                  Cravath, Swaine & Moore LLP
                  825 Eighth Avenue
                  New York, NY 10019
                  Attention:  Stephen L. Burns, Esq.
                              James C. Woolery, Esq.


                  with a copy to:

                  Norton Rose
                  Kempson House

                                       41



                  Camomile Street
                  London EC3A 7AN

                  Attention: Jill Gauntlett

         13.18.3  A Notice to the Purchaser shall be sent to the following
                  address, or such other person or address as the Purchaser may
                  notify to the Seller and the Guarantor from time to time:

                  NGG Telecoms Investment Limited
                  1-3 The Strand,
                  London WC2N 5EH

                  Attention:  The Company Secretary

                  with a copy to:

                  Linklaters
                  One Silk Street
                  London EC2Y 8HQ

                  Attention: Roger Barron

         13.18.4  A Notice to the Guarantor shall be sent to the following
                  address, or such other person or address as the Guarantor may
                  notify to the Purchaser and the Seller from time to time:

                  National Grid Holdings One plc
                  1-3 The Strand,
                  London WC2N 5EH

                  Attention: The Company Secretary

                  with a copy to:

                  Linklaters
                  One Silk Street
                  London EC2Y 8HQ

                  Attention: Roger Barron

         13.18.5  A Notice shall be effective upon receipt and shall be deemed
                  to have been received:

                  (i)      five Business Days after posting, if delivered by
                           pre-paid first class post; or

                  (ii)     at the time of delivery, if delivered by hand or
                           courier.

13.19    Invalidity

         13.19.1  If any provision in this Agreement shall be held to be
                  illegal, invalid or unenforceable, in whole or in part, the
                  provision shall apply with whatever deletion or modification
                  is necessary so that the provision is legal, valid and
                  enforceable and gives effect to the commercial intention of
                  the parties.

         13.19.2  To the extent it is not possible to delete or modify the
                  provision, in whole or in part, under Clause 13.19.1, then
                  such provision or part of it shall, to the extent that it is
                  illegal, invalid or unenforceable, be deemed not to form part
                  of this Agreement and


                                       42



                  the legality, validity and enforceability of the remainder of
                  this Agreement shall, subject to any deletion or modification
                  made under Clause 13.19.1, not be affected.

13.20    Counterparts

         This Agreement may be entered into in any number of counterparts, all
         of which taken together shall constitute one and the same instrument.
         The Seller, the Purchaser and the Guarantor may enter into this
         Agreement by executing any such counterpart.

13.21    Dispute Resolution

         13.21.1  Subject to Clause 7 (Post-Closing Adjustments), if any dispute
                  arises in connection with this Agreement, the Seller, the
                  Purchaser and the Guarantor will attempt to settle it by
                  mediation in accordance with the CEDR Model Mediation
                  Procedure. Unless otherwise agreed by the Seller, the
                  Purchaser and the Guarantor, the mediator will be nominated by
                  CEDR.

         13.21.2  To initiate the mediation, a party must give notice in writing
                  (an "ADR Notice") to the other parties requesting a mediation.
                  A copy of the request shall be sent to CEDR Solve. The
                  mediation will start not later than 20 days after the date of
                  the ADR Notice.

         13.21.3  No party may commence any arbitration in relation to any
                  dispute arising out of this Agreement until it has attempted
                  to settle the dispute by mediation and either the mediation
                  has terminated or the other parties have failed to participate
                  in the mediation, provided that the right to issue proceedings
                  is not prejudiced by a delay.

         13.21.4  If the dispute is not settled by mediation within ten days of
                  commencement of the mediation or within such further period as
                  the parties may agree in writing, the dispute shall be
                  referred to and finally resolved by arbitration as set out
                  below.

         13.21.5  Subject to Clause 7 (Post-Closing Adjustments), any dispute
                  arising out of or in connection with this Agreement, including
                  any question regarding the validity, existence or termination
                  of this Agreement and/or this Clause 13.21, which has not been
                  settled by mediation in accordance with Clauses 13.21.1 to
                  13.21.4 above, shall be finally resolved by arbitration in
                  England, conducted in English, by three arbitrators pursuant
                  to the rules of the London Court of International Arbitration
                  (the "LCIA") (the "Rules") save that the Rules shall be
                  amended in relation to the appointment of arbitrators and the
                  disclosure of documents in any arbitration proceedings as set
                  out below.

         13.21.6  One arbitrator shall be nominated by the Seller and one
                  arbitrator shall be nominated jointly by the Purchaser and the
                  Guarantor. If the Purchaser and the Guarantor are unable to
                  agree on the nomination of an arbitrator within 15 days of
                  notification of the Seller's nominated arbitrator, the LCIA
                  shall appoint an arbitrator on behalf of the Purchaser and the
                  Guarantor. The third arbitrator shall be selected
                  by the two so chosen within 15 days of the appointment of the
                  second arbitrator, failing which the LCIA shall appoint the
                  third arbitrator, who shall be the chairman of the arbitral
                  tribunal.

         13.21.7  The parties agree that disclosure in any arbitration shall be
                  in accordance with the standard disclosure requirements of the
                  Civil Procedure Rules of the English court.


                                       43




         13.21.8  Documents to be sent under this provision shall be sent in
                  accordance with the Notice provisions set out in Clause 13.18.

13.22    Governing Law

         This Agreement (and for the avoidance of doubt, Clause 13.21 in
         particular) and the documents to be entered into pursuant to it, save
         as expressly referred to therein, shall be governed by and construed in
         accordance with English law.

13.23    Appointment of Process Agent

         13.23.1  The Seller hereby irrevocably appoints Norose Services Limited
                  of Kempson House, Camomile Street, London EC3A 7AN as its
                  agent to accept service of process in England in any legal
                  action or proceedings arising out of this Agreement, service
                  upon whom shall be deemed completed whether or not forwarded
                  to or received by the Seller.

         13.23.2  The Seller agrees to inform the Purchaser and the Guarantor in
                  writing of any change of address of such process agent within
                  28 days of such change.

         13.23.3  If such process agent ceases to be able to act as such or to
                  have an address in England, the Seller irrevocably agrees to
                  appoint a new process agent in England acceptable to the
                  Purchaser and the Guarantor and to deliver to the Purchaser
                  and the Guarantor within 14 days a copy of a written
                  acceptance of appointment by the process agent.

         13.23.4  Nothing in this Agreement shall affect the right to serve
                  process in any other manner permitted by law or the right to
                  bring proceedings in any other jurisdiction for the purposes
                  of the enforcement or execution of any judgment or other
                  settlement in any other courts.

13.24    Consents and Waivers

         The Purchaser acknowledges that the consents and waivers with respect
         to the transactions contemplated by this Agreement set out in Section
         6.7 of the Disclosure Letter may be required from third parties. The
         Purchaser agrees that the Seller shall not have any Liability
         whatsoever to the Purchaser arising out of or relating to the failure
         to obtain any consents or waivers set out in Section 6.7 of the
         Disclosure Letter that may be required in connection with the
         transactions contemplated by this Agreement or because of the
         termination of any contract, licence or permit as a result thereof. The
         Purchaser further agrees that no Seller Warranty or covenant contained
         herein shall be breached or deemed breached as a result of (i) the
         failure to obtain any such consent or waiver, (ii) any such termination
         or (iii) any action, claim or proceeding commenced or threatened by or
         on behalf of any person arising out of or relating to the failure to
         obtain any such consent or waiver or as a result of any such
         termination. With respect to any such consent or waiver not obtained
         prior to Closing, the Seller shall continue at the Purchaser's request
         to use reasonable endeavours to cooperate with the Purchaser in
         attempting to obtain any such consent or waiver for 180 days after
         Closing. For the purposes of this Clause 13.24, "reasonable endeavours"
         shall not include any requirement of the Seller or any of its
         Affiliates to expend money (other than nominal amounts), commence or
         participate in any litigation or offer or grant any material
         accommodation (financial or otherwise) to any third party.



                                       44




14       Tax Indemnity

14.1     The Seller covenants to pay to the Purchaser an amount equal to:

         14.1.1   all Liability for Taxes of the Group Companies which arises as
                  a consequence of an Event occurring or deemed (for Taxation
                  purposes) to have occurred, on or before the Closing Date, or
                  which arises by reference to profits earned, accrued or
                  received on or before the Closing Date;

         14.1.2   all Liability for Taxes of any Group Company that would not
                  have arisen but for any Group Company being controlled or
                  connected for Tax purposes on or before Closing by any person
                  or entity other than another Group Company;

         14.1.3   the amount of any additional Tax which is payable if any
                  Purchaser Relief is not available or is lost, reduced or
                  cancelled; and

         14.1.4   all reasonable legal and other professional fees and expenses
                  properly attributable to any of the items in Clauses 14.1.1,
                  14.1.2 and 14.1.3. For the purposes of this Clause 14, a
                  Liability for Taxes shall be deemed to arise not only when an
                  actual payment of Taxes or payment in respect of Taxes is due,
                  but where a payment of Taxes or payment in respect of Taxes
                  would be due but for the availability of any Relief (other
                  than Seller's Relief which is not taken into account pursuant
                  to Clause 14.11).

14.2     The covenant in Clause 14.1 shall not apply, and the Seller shall have
         no liability to make a payment under Clause 14.1 or for breach of the
         warranties in paragraph 12 of Schedule 5 (the "Tax Warranties") in
         respect of any Liability for Taxes of any person to the extent that:

         14.2.1   such Liability for Taxes is a liability to United Kingdom
                  corporation tax which arises as a result of an Event
                  (including the earning of income, profits or gains) occurring
                  since 31 December 2003 in the ordinary course of business of
                  any of the Group Companies (as carried on at Closing);

         14.2.2   provision or reserve for such a Liability for Taxes was made
                  or reflected in the Working Capital Statement or such
                  Liability for Taxes was otherwise taken into account as a
                  liability in the Working Capital Statement;

         14.2.3   such Liability for Taxes was discharged prior to Closing;

         14.2.4   such Liability for Taxes arises or is increased as a result of
                  a Change in Tax Law;

         14.2.5   such Liability for Taxes would not have arisen but for a
                  change after the Closing Date in accounting policies or
                  practices in effect on the Closing Date save for any change
                  which is necessary to cause such accounting policies or
                  practices to comply with UK GAAP as at the Closing Date;

         14.2.6   such Liability for Taxes would not have arisen but for any
                  voluntary act, omission or transaction by the Purchaser, any
                  Group Company or any of their respective directors, employees
                  or agents after the Closing Date, and the Purchaser or any
                  Group Company or any of their respective directors, employees
                  or agents knew that the voluntary act, omission or transaction
                  would have given rise to the Liability in question other than
                  any act, omission or transaction which was (A) required by Law
                  in effect on the date of this Agreement; (B) pursuant to a
                  legally binding commitment of the Group Company created on or
                  before the Closing Date; or (C)


                                       45




                  in the ordinary course of business of the Group Company as
                  carried on immediately before the Closing Date;

         14.2.7   such Liability for Taxes arises as a result of a failure by
                  the Purchaser or any Group Company after the Closing Date to
                  (A) submit the Tax Returns required to be made by or on behalf
                  of that person; (B) submit such Tax Returns within the
                  appropriate time limits or otherwise than on a proper basis;
                  or (C) make any payments assumed to be made for purposes of
                  the provision in the Working Capital Statement, except in each
                  case where any such failure arises as a result of a breach by
                  Seller of its obligations under Clause 15;

         14.2.8   such Liability for Taxes arises as a result of the amendment,
                  disregard, withdrawal or disclaimer by the Purchaser or any
                  Group Company after the Closing Date of any claim, election,
                  surrender or disclaimer made on or before the Closing Date
                  except where the making of that amendment, disregard,
                  withdrawal or disclaimer is or has been, or the making of that
                  claim, election, surrender or disclaimer is not or has not
                  been, assumed in computing the provision for Taxes in the
                  Working Capital Statement;

         14.2.9   such Liability for Taxes would not have arisen but for the
                  failure or omission to make any claim, election, surrender or
                  disclaimer, or to give any notice or consent or to take any
                  other action that is or has been assumed in computing the
                  provision for Taxes in the Working Capital Statement and full
                  particulars of which have been given by the Seller to the
                  Purchaser in good time to allow the Purchaser to procure the
                  making of the claim, election, surrender or disclaimer, the
                  giving of any notice or consent or the taking of any other
                  such action;

         14.2.10  such Liability for Taxes is a Liability for interest or
                  penalties and would not have arisen but for the failure of any
                  Group Company to pay the relevant Tax Authority an amount of
                  Taxes equal to the payment made by the Seller to the Purchaser
                  hereunder in respect of such Taxes not later than the Business
                  Day following the date such payment is made hereunder;

         14.2.11  such Liability for Taxes is a Liability for interest or
                  penalties attributable to an underpayment of Taxes payable in
                  instalments under the Corporation Tax (Instalment Payments)
                  Regulations 1998 for the accounting period commencing prior to
                  the Closing Date to the extent that the underpayment would not
                  have been an underpayment but for an Event occurring after the
                  Closing Date;

         14.2.12  the Purchaser or that person has received from any other
                  person other than a Group Company a payment in respect of such
                  Liability for Taxes;

         14.2.13  such Liability for Taxes was satisfied by the Seller and the
                  Liability of the Group Company was correspondingly
                  extinguished or reduced under any statutory provision imposing
                  Liability on the Seller or any member of the Purchaser's Group
                  (other than a Group Company) for Taxes primarily chargeable
                  against any Group Company;

         14.2.14  such Liability for Taxes arises as a result of an Event
                  occurring after 31 December 2003 and as a result of that
                  Event, there is an increase in the assets of that person in
                  excess of their value as reflected in the Working Capital
                  Statement, but only to the extent such Liability for Taxes
                  does not exceed such increase in assets; or

         14.2.15  such Liability for Taxes would not have arisen but for the
                  failure of the Purchaser to


                                       46



                  comply with its obligations under Clauses 14.5, 14.7, 14.15 or
                  15.1.


14.3     The Purchaser covenants to pay to the Seller an amount equal to (i) any
         Taxes for which the Seller or other person (other than a Group Company)
         by virtue of that person being controlled by the Seller becomes liable
         as a result of any Group Company failing to discharge any Liability for
         Taxes when payable, (ii) any Liability for Taxes arising to the Seller,
         or a person controlled by the Seller (other than a Group Company)
         pursuant to: (A) Section 132 of the Finance Act 1988 if a Group Company
         ceases to be resident in the United Kingdom after the Closing Date; (B)
         Section 190 of the Taxation of Chargeable Gains Act 1992 if the unpaid
         tax referred to in Section 190(1) is first assessed against any Group
         Company; (C) paragraph 68 Schedule 29 Finance Act 2002 where the unpaid
         tax referred to in paragraph 68(1) is first assessed on any Group
         Company; (D) paragraph 75A Schedule 18 of the Finance Act 1998 where
         the claimant company is a Group Company; or (E) Section 767A of the
         Taxes Act or Schedule 28 of the Finance Act 2000 where the taxpayer
         company is a Group Company or Section 767AA of the Taxes Act where the
         transferred company is a Group Company, (iii) all reasonable legal fees
         and expenses attributable to any item in Clause (i) or (ii); provided
         that the Purchaser shall not be liable to make a payment to the Seller
         under this Clause 14.3 in respect of any Taxes:

         14.3.1   which are subject to a valid claim under Clause 14.1 by the
                  Purchaser which has not been satisfied or could be the subject
                  of any such valid claim, assuming that a claim was made in
                  respect of such Taxation (ignoring for these purposes Clause 9
                  of the Agreement);

         14.3.2   which have been recovered under any relevant statutory
                  provision (and the Seller shall procure that no such recovery
                  is sought to the extent that payment is made under this Clause
                  14.3);

         14.3.3   with respect to which the Purchaser would have a claim against
                  the Seller under Clause 14.1; or

         14.3.4   for breach of the Tax Warranties and such claim has not been
                  satisfied by the Seller. The provisions of Clause 14.9 and
                  14.10 below shall apply to this Clause 14.3 with the necessary
                  changes.

14.4     Any payment to be made pursuant to Clause 14.1, 14.3, 14.16 or 14.17
         shall be paid within ten Business Days after the person to whom the
         payment is due to be made (the "Indemnified Party") makes written
         demand upon the other party (the "Indemnifying Party"), but in no case
         (except in the case of a payment under Clause 14.16 or 14.17) earlier
         than five Business Days prior to the date on which the relevant Taxes
         (including any estimated Tax payments) are required to be paid to the
         relevant Tax Authority (or would be required to be paid but for the
         availability of any Relief (other than a Seller's Relief which is not
         taken into account pursuant to Clause 14.11)).

14.5     Reasonably promptly after a party becomes aware of the existence of a
         Tax issue that may give rise to a claim under Clause 14.1, 14.3, 14.16
         or 14.17 or for breach of the Tax Warranties (a "Tax Controversy") by
         it against the other party, the Indemnified Party shall notify the
         Indemnifying Party of the Tax issue and thereafter shall promptly
         forward to the Indemnifying Party copies of notices and communications
         with a Tax Authority relating to such Tax Controversy. Except as
         provided in this Clause 14.5 and provided that the



                                       47




         Indemnifying Party agrees to indemnify the Indemnified Party against
         any Liability which may be suffered by it (or where the Indemnified
         Party is the Purchaser, a Group Company) in connection therewith, the
         Indemnifying Party may, subject to Clauses 14.6 and 14.7 below, request
         that the Indemnified Party takes such action as it may reasonably
         request to deal with, settle or contest any audit inquiry, information
         request, audit proceeding, suit, contest or any other action with
         respect to a Tax Controversy for which it would be required to make a
         payment under Clause 14.1, 14.16 or 14.17 for breach of the Tax
         Warranties or (as the case may be) Clause 14.3. The Indemnified Party
         shall not be required to take any action which is likely to increase
         its liability to Taxation for accounting periods ending after Closing
         (other than as a result of the reduction or utilisation of any Seller's
         Relief). Any out of pocket expenses incurred by the Indemnified Party
         in handling, settling or contesting a Tax Controversy at the request of
         the Indemnifying Party under this Clause 14.5 shall be borne by the
         Indemnifying Party.

14.6     The Indemnified Party (or where the Indemnified Party is the Purchaser,
         the Group Company) shall be at liberty without reference to the
         Indemnifying Party to deal with any matter which could give rise to a
         Liability under this Clause 14 if the Indemnifying Party delays
         unreasonably in giving any such request as is mentioned in Clause 14.5
         above provided that Indemnified Party concerned has notified the
         Indemnifying Party of its intention to so deal with the matter and has
         afforded the Indemnifying Party a period of 15 Business Days to
         respond.

14.7     Subject to Clause 14.6 and provided that the Indemnifying Party agrees
         to indemnify the Indemnified Party against any Liability which may be
         suffered by it (or where the Indemnified Party is the Purchaser, a
         Group Company) in connection therewith and, provided that the
         Indemnified Party shall not be required to take any action which is
         likely to increase its liability to Taxation for accounting periods
         ending after Closing (other than as a result of the reduction or
         utilisation of any Seller's Relief), the Seller and the Purchaser shall
         each have the right to participate in all activities and strategic
         decisions relating to any litigation of the Tax Controversy in front of
         any court or any other Tax proceedings for which each party would be
         required to make a payment under Clause 14.1, 14.3, 14.16 or 14.17 or
         for breach of the Tax Warranties with respect to one or more Tax
         issues.

14.8     The Purchaser shall, to the extent possible, apply any Relief (other
         than any Purchaser Relief or a Post-Closing Relief) to mitigate any
         Liability for Taxes which is the subject of a claim under Clause 14.1
         or for breach of the Tax Warranties, including apportioning or
         reapportioning any amount pursuant to any Group Payment Arrangements to
         which any Group Company is a party or making such claims or elections
         in relation to such Seller Relief as the Seller reasonably requests.

14.9     If the Seller pays any amount to the Purchaser under Clause 14.1, 14.16
         or 14.17 or for breach of the Tax Warranties in respect of any
         Liability for Taxes (a "Relevant Payment") and the Purchaser or a Group
         Company (the "Relevant Recipient") receives a rebate, refund, credit,
         set off, other tax benefit or payment from any other person other than
         a Group Company in respect of such Liability (the "Relevant Receipt"),
         the Purchaser shall repay or cause to be repaid to the Seller an amount
         equal to the lesser of (i) the amount of the Relevant Receipt less any
         Liability for Taxes of the Relevant Recipient in respect of the
         Relevant Receipt and reasonable costs incurred by the Purchaser or the
         Relevant Recipient in obtaining it (to the extent that such costs have
         not been reimbursed pursuant


                                       48




         to Clause 14.10) and (ii) the amount of the Relevant Payment less any
         Liability for Taxes on the receipt thereof. If the Relevant Recipient
         receives a rebate, refund, credit, set off or other tax benefit in
         respect of which it is required by this Clause 14.9 to make a payment,
         the Relevant Recipient shall not be obliged to make that payment until
         such date upon which the Relevant Recipient's liability to make an
         actual payment of Tax is reduced by reason of the rebate, refund,
         credit, set off or other tax benefit.

14.10    The Purchaser shall notify the Seller of (i) any actual entitlement of
         the Purchaser or any Group Company to any Relevant Receipt or, (ii) any
         prospective entitlement to any Relevant Receipt which may become an
         actual entitlement, as soon as is reasonably practicable after the
         Purchaser becomes aware of such actual or prospective entitlement. The
         Purchaser shall, if the Seller so requests and at the Seller's expense,
         take or cause to be taken such action reasonably required to secure the
         Relevant Receipt.

14.11    If the auditors for the time being of any Group Company certify in
         writing (at the request and reasonable expense of the Seller) to the
         Seller and the Purchaser that (i) the Working Capital Statement
         includes an over provision for Taxes of any Group Company or (ii) if
         the Liability for Taxes of any Group Company (other than a Liability
         for Taxes in respect of which the Seller would have a claim under
         Clause 14.1 or the Tax Warranties) is reduced as a result of the
         utilisation of any Seller Relief after the Closing Date, an amount
         equal to the over provision or reduction in Liability, as the case may
         be, shall be set off against any payment then due from the Seller to
         the Purchaser under this Agreement. To the extent that the
         overprovision or reduction in Liability exceeds the amount of any
         payment then due from the Seller, the balance shall be carried forward
         and set off against any payment which becomes due from the Seller in
         the future. For purposes of this Clause 14.11, none of the following
         matters shall be considered to give rise to an over provision or
         reduction in Liability: (i) the utilisation of any Purchaser Relief or
         Post-Closing Relief and (ii) a Change in Tax Law.

14.12    If the Seller is required to make a payment to the Purchaser under
         Clause 14.1 or for breach of the Tax Warranties in respect of a
         Liability for Taxes (the "Initial Payment") and, had such Liability
         been taken into account in the preparation of the Working Capital
         Statement, another adjustment would have been required to be made (a
         "Secondary Adjustment") that would have reduced the Liability for Taxes
         or increased the Relief of any Group Company then, to the extent that
         the Secondary Adjustment does not result in an over-provision being
         taken into account within Clause 14.11, the liability of the Seller to
         the Purchaser for such Liability shall be reduced by the amount of the
         reduction in Liability or increase in Relief, as the case may be. If
         the Secondary Adjustment results in the increase of a Relief, including
         through an increase of a deferred tax asset or a reduction in deferred
         tax Liability, then the liability of the Seller to the Purchaser shall
         not be reduced in accordance with this Clause 14.12 but when such
         reduction in deferred tax Liability or increase in deferred tax asset
         reduces the liability of the Purchaser, any member of the Purchaser's
         Group or any Group Company to make an actual payment of Tax by reason
         of such increase in Relief the Purchaser shall (if such reduction
         occurs within seven years of the date hereof) make a payment of an
         amount to the Seller equal to the lower of (a) that reduction and (b)
         the Initial Payment.

14.13    Share Options

         14.13.1  The Seller will pay to the Purchaser on the due date for
                  payment an amount equal


                                       49



                  to:

                  (i)      any liability of any member of the Purchaser's Group
                           to pay secondary National Insurance contributions and
                           any liability to account for primary National
                           Insurance contributions and income tax due under PAYE
                           arising in respect of any share incentive, share
                           option or other incentive granted before Closing to
                           any Relevant Employee or any former employee of any
                           Group Company; and

                  (ii)     any penalties or interest arising for any member of
                           the Purchaser's Group in connection with a failure of
                           the Seller to pay amounts due under Clause 14.13.1.

         14.13.2  The due date for payment in relation to Clause 14.13.1:

                  (i)      shall be ten Business Days before the latest date on
                           which the National Insurance contributions and PAYE
                           may be paid to the Inland Revenue without a liability
                           to interest and penalties arising; or

                  (ii)     if payment has already been made or Clause 14.13.1
                           applies, five Business Days after service by a member
                           of the Purchaser's Group of a notice containing a
                           written demand.

         14.13.3  The members of the Purchaser's Group appoint the Seller as
                  their agent to collect an amount equal to any employees'
                  National Insurance contribution and income tax liability under
                  PAYE arising in respect of any share incentive, share option
                  or other incentive granted before Closing to any Relevant
                  Employee or any former employee of any Group Company.

         14.13.4  The Seller will provide the Purchaser with all information
                  reasonably required by the Purchaser relating to the
                  calculation of amounts payable under this Clause 14.13 within
                  ten Business Days of the liability arising or, if sooner, ten
                  Business Days before the date the liability is payable by the
                  Purchaser.

         14.13.5  If the Purchaser becomes aware after Closing of any matter
                  which could give rise to a liability under this Clause 14.13
                  it shall give notice of that matter to the Seller within ten
                  Business Days of becoming so aware.

         14.13.6  The Purchaser will after Closing provide such information
                  and/or assistance as the Seller may reasonably request in
                  writing for the purpose of making or calculating any
                  deduction, withholding or payment in respect of Tax or
                  National Insurance which the Seller is required to make, or
                  the making or giving of any return or notice to any Taxation
                  Authority, in connection with any share incentive, share
                  option or other incentive granted before Closing to any
                  Relevant Employee or any former employee of any Group Company
                  within ten Business Days of receiving such a request.

         14.13.7  The Seller's liability to make a payment to the Purchaser
                  under Clause 14.13.1 above shall be reduced by an amount equal
                  to 30% of any Share Option Relief available to the Purchaser,
                  or the relevant Group Company in respect of the share
                  incentive, share option or other incentive in question.

         14.13.8  For the purposes of Clause 14.13.7 above it shall be assumed
                  that the Purchaser, or the relevant Group Company, has
                  obtained a Share Option Relief in relation to each share
                  incentive, share option or other incentive giving rise to an
                  obligation to



                                       50



                  make a payment pursuant to Clause 14.13.1 and such assumption
                  shall be rebutted only in the circumstances set out in Clause
                  14.13.9.

         14.13.9  The assumption in Clause 14.13.8 shall be rebutted to the
                  extent that:

                  (i)      the Purchaser demonstrates that the Share Option
                           Relief is not available as a consequence of an act or
                           omission by the Seller or any Group Company prior to
                           Closing, including the obtaining of a Relief in
                           relation to such share incentive, share option or
                           incentive prior to Closing; or

                  (ii)     the Purchaser demonstrates that the Share Option
                           Relief is not available as a consequence of the
                           failure of any of the conditions set out in paragraph
                           4(3) of Schedule 23 Finance Act 2003.

14.14    If paragraph 12.6 of Schedule 5 is untrue with respect to any document
         or transaction the Seller shall pay to the Purchaser by way of
         liquidated damages an amount equal to any stamp duty or SDLT paid by a
         Group Company under the Clawback Provision or Secondary Recovery
         Provision (both as defined in paragraph 12.1 of Schedule 5) and any
         interest or penalties payable in respect thereof (except to the extent
         that any interest or penalties are due to the unreasonable delay or
         default of the Purchaser or any member of the Purchaser's Group),
         provided that the Seller shall not be liable under paragraph 12.6 of
         Schedule 5 above to the extent that such stamp duty or SDLT is payable
         as a result of a voluntary transaction effected after Closing otherwise
         than pursuant to a legally binding obligation, whether or not
         conditional, entered into on or before Closing.

14.15    The Purchaser:

         14.15.1  shall (to the extent permitted by Law) procure that each Group
                  Company shall make such claims and elections in respect of
                  Capital Allowances and Group Relief as shall ensure that the
                  Actual Tax Written Down Value is neither more nor less than
                  the Estimated Tax Written Down Value. For the avoidance of
                  doubt, this Clause 14.15 shall not require the Purchaser or
                  any member of the Purchaser's Group (other than any Group
                  Company) to surrender Group Relief to or accept the surrender
                  of Group Relief from any Group Company;

         14.15.2  shall not (except to the extent required by Law) and shall
                  procure that no Group Company shall (except to the extent
                  required by Law) alter or amend any claims and elections
                  either made pursuant to Clause 14.15.1 or (in respect of
                  Capital Allowances) made before Closing to ensure that the
                  Actual Tax Written Down Value is neither more nor less than
                  the Estimated Tax Written Down Value;

         14.15.3  shall not (except to the extent required by Law or pursuant to
                  Clause 14.15.1) and shall procure that no Group Company shall
                  (except to the extent required by law or pursuant to Clause
                  14.15.1) alter or amend any claims or elections relating to
                  Capital Allowances the making of which was assumed in the
                  audited annual consolidated accounts of the Company or the
                  audited annual accounts of Crown Castle UK, in each case for
                  the financial year ended 31 December 2003; and

         14.15.4  hereby agrees that if the Seller is or would otherwise be
                  liable to make a payment under Clause 14.1.1 hereof in respect
                  of a Liability for Taxes arising as a consequence of an Event
                  occurring (including the earning of income, profit or gains)
                  on or prior to 31 December 2003 the Purchaser shall use
                  reasonable endeavours to procure that such claims and
                  elections are made in respect of


                                       51





                  Capital Allowances for the purpose of reducing or eliminating
                  that Liability for Taxes and the Purchaser shall instead make
                  a claim under Clause 14.16 in respect of the reduction of the
                  Actual Tax Written Down Value below the Estimated Tax Written
                  Down Value which results from the use of the Capital
                  Allowances to reduce or eliminate that Liability for Taxes.

14.16    Subject to Clause 14.19, the Seller covenants that if the Actual Tax
         Written Down Value is less than the Estimated Tax Written Down Value
         (including by virtue of the setting off of any Capital Allowances
         against any income, profit or gains accrued, earned or received on or
         before 31 December 2003), then the Seller shall pay to the Purchaser an
         amount equal to 23.1% of the amount by which the Actual Tax Written
         Down Value is less than the Estimated Tax Written Down Value; provided
         always that the amount payable by the Seller shall be reduced by an
         amount equal to 10% of any corresponding increase in the Long Life
         Asset Pool (for example, any increase which results from an asset which
         was not treated as a Long Life Asset for the purposes of the
         calculation referred to in paragraph 12.5 of Schedule 5 being or
         subsequently being treated as a Long Life Asset).

14.17    The Seller covenants to pay to the Purchaser an amount equal to 30% of
         the amount by which the profits of the Group Companies which would be
         chargeable to United Kingdom corporation tax (on the assumption that
         the Group Companies were not to claim any Capital Allowances)
         (including any trading losses resulting from claims and elections made
         to reduce the Actual Tax Written Down Value to the Estimated Tax
         Written Down Value) or any Group Relief from any company which is not a
         Group Company and were not entitled to any Purchaser Relief) in respect
         of the accounting period which would end on Closing if an accounting
         period of each Group Company were to end on Closing exceeds (a)
         (pound)64,014,773 (sixty four million, fourteen thousand, and seven
         hundred and seventy three pounds Sterling), if Closing occurs on or
         prior to 31 August 2004; or (b) (pound)72,016,620 (seventy two million,
         sixteen thousand and six hundred and twenty pounds Sterling), if
         Closing occurs on or prior to 30 September 2004 (but after 31 August
         2004). Notwithstanding Clause 14.4, the Seller shall not be obliged to
         make a payment under this Clause 14.17 earlier than 30 June 2005. The
         amount payable under this Clause 14.17 shall be reduced by an amount
         equal to any corporation tax included in the Base Working Capital
         Liabilities.

14.18    The Purchaser shall not make any claim under any provision of this
         Agreement other than under Clause 14.16 or 14.17 (and the Seller shall
         not be liable to make a payment under any provision of this Agreement
         other than under Clause 14.16 or 14.17) in respect of any matter or
         matters which comprise or involve paragraph 12.3 of Schedule 5 (or, if
         Closing shall occur on 30 September 2004, paragraph 12.4 of Schedule 5)
         being untrue or ceasing to be true.

14.19    The covenant in Clause 14.16 shall not apply, and the Seller shall have
         no liability to make a payment under Clause 14.16 to the extent that
         the Actual Tax Written Down Value is less than the Estimated Tax
         Written Down Value as a result of :

         14.19.1  the making of any claim or election which results in any Group
                  Company having a correspondingly increased amount of trading
                  losses available to carry forward from the accounting period
                  which ends on 31 December 2003;

         14.19.2  any voluntary act, omission or transaction by the Purchaser,
                  any Group Company or any of their respective directors,
                  employees or agents after the Closing Date


                                       52



                  (including any change in accounting policies or practices in
                  effect on the Closing Date save for any change which is
                  necessary to cause such accounting policies or practices to
                  comply with UK GAAP as at the Closing Date) and the Purchaser
                  or any Group Company or any of their respective directors,
                  employees or agents knew that the voluntary act, omission or
                  transaction would result in the Actual Tax Written Down Value
                  being less than the Estimated Tax Written Down Value, other
                  than any act, omission or transaction which was (a) required
                  by Law in effect at the date of this Agreement; (b) is
                  pursuant to a legal binding commitment of the Group Company
                  created on or before the Closing Date; or (c) carried out in
                  compliance with the Purchaser's obligations under Clause 14.15
                  or 15.5; or

         14.19.3  the failure by the Purchaser to comply with its obligations
                  under Clauses 14.5, 14.7, 14.15 or 15.1.

14.20    If (i) the Seller has made or is liable to make a payment pursuant to
         Clause 14.16; and (ii) the liability to make that payment would not
         have arisen but for either (a) the disallowance, postponement or
         restriction of any deduction in computing the profits of any Group
         Company (for the purposes of corporation tax) of a Pre-Closing Tax
         Period; or (b) any expenditure incurred by any Group Company on or
         before 31 December 2003 not qualifying for Capital Allowances; and
         (iii) the auditors for the time being of any Group Company certify in
         writing (at the request and reasonable expense of the Seller) to the
         Seller and the Purchaser that the liability of any Group Company or any
         member of the Purchaser's Group to make an actual payment of Taxes or
         payment in respect of Taxes is lower than it would have been as a
         result of the matters referred to in (ii) above (for example, as a
         result of a deduction being available in a later accounting period
         rather than an earlier accounting period) (the "Saving"); then the
         amount of the Saving shall be set off against any payment due from the
         Seller under this Clause 14 or (to the extent that it is not so set
         off) shall be carried forward and set off against any future payments
         which become due from the Seller under this Clause 14.

15       Tax Returns etc.

15.1     The Seller shall at its cost timely prepare, file, or cause to be
         prepared and filed, consistent with past practice and (subject to
         Clauses 14.5 to 14.7) have conduct of all Tax Returns and all matters
         relating to the Tax Returns of the Group Companies for any Pre-Closing
         Tax Period including all claims, elections, surrenders, disclaimers,
         notices and consents and shall present Tax Returns and any
         communication with any Tax Authority in draft to the Purchaser for
         review in the case of corporation tax Tax Returns at least 30 days
         before the date on which the such Tax Returns are required to be filed
         and in the case of all other Tax Returns within a reasonable period
         before the expiration of any applicable statutory time limit for the
         filing of such Tax Returns are required to be filed or, in the case of
         any communications, before the intended date of submission. With
         respect to Tax Returns for any Pre-Closing Tax Period, the Purchaser
         shall procure that the relevant Group Company (i) notifies the Seller
         of any intended written communication with the relevant Tax Authority,
         (ii) signs and submits any properly and accurately prepared Tax Return,
         (iii) makes any proper and accurate claims, disclaimers, notices or
         elections; and (iv) gives any proper and accurate consents, in each
         case as may be reasonably required by the Seller. The Purchaser shall
         timely prepare, file or procure to be prepared and filed, on a basis
         which is (to the extent permitted by Law) consistent with the past
         practice and, subject to Clauses 14.5 to 14.7, shall have conduct of
         all Tax Returns and all matters relating to the Tax


                                       53




         Returns of the Group Companies for the Straddle Period and shall
         present such Tax Returns and any communication with any Tax Authority
         in draft to the Seller for review, in the case of corporation tax, Tax
         Returns, at least 30 Business Days before the date on which such Tax
         Returns are required to be filed and, in the case of all other Tax
         Returns, within a reasonable period before the expiration of any
         applicable statutory time limit by the end of which such Tax Returns
         are required to be filed or, in the case of any communications, before
         the intended date of submission and shall take into account such
         reasonable comments in relation thereto as the Seller makes. The Seller
         shall co operate with the Purchaser in providing such information and
         assistance as the Purchaser may reasonably request in relation to the
         Tax Return for the Straddle Period and all Tax Returns with respect to
         any Group Companies for any Post-Closing Tax Period.

15.2     The amount or economic benefit of (i) any Seller Relief with respect to
         Taxes of the Group Companies, or of any affiliated, consolidated,
         combined or unitary group of which any Group Company is or has been a
         member for any Pre-Closing Tax Period in any audit, examination, suit,
         contest or other Tax proceeding of the Seller or any member of the
         Seller's Group in a Pre-Closing Tax Period shall be for the account of
         the Seller; or (ii) any Relief realised by the Purchaser or any member
         of the Purchaser's Group in a Post-Closing Tax Period as a result in
         any corresponding offsetting adjustment in any audit, examination,
         suit, contest or other Tax proceeding of the Seller or any member of
         the Seller's Group in a Pre-Closing Tax Period shall be for the account
         of the Seller provided that this shall not apply to any Purchaser
         Relief. Except as described in the preceding sentence, the amount or
         economic benefit of any Relief with respect to Taxes of any Group
         Company for any Post-Closing Tax Period shall be for the account of the
         Purchaser. Each party shall forward, and shall cause the members of its
         group to forward, to the party entitled pursuant to this Clause 15.2 to
         receive the amount or economic benefit of a Relief, the amount or
         economic benefit of the Relief within 10 days after the Relief is
         received or applied against another Liability for Taxes, as the case
         may be.

15.3     The Purchaser shall not make any election under Section 338 of the
         United States Internal Revenue Code of 1986 (as amended) with respect
         to any UK Group Company without the Seller's prior written consent,
         which consent may be provided or withheld in the sole discretion of the
         Seller.

15.4     The Purchaser and the Seller agree that they shall each take such
         action within their control to ensure that they shall not alter or
         amend, and that no Group Company shall alter or amend, any Group Relief
         claims or any other arrangements for the allocation of Relief (or the
         terms thereof) made by the Seller or any Group Company relating to any
         Pre-Closing Tax Period and the making of which was assumed in the
         Working Capital Statement or is specified in the Disclosure Letter,
         except where (i) the Group Relief is not available; and (ii) if an
         amendment or alteration were not made a claim could be made pursuant to
         Clause 14.1.

15.5     The Seller may retain any Tax Returns, reports or forms, and the
         Purchaser shall be provided with copies of such returns, reports or
         forms.


                                       54




16       Environmental Indemnity

16.1     Radiation

         Subject to Clause 16.3, the Seller shall indemnify and hold harmless
         and keep indemnified the Purchaser (for itself and for any member of
         the Purchaser's Group) from and against any and all Losses which are
         suffered or incurred by the Purchaser or any member of the Purchaser's
         Group arising out of or in relation to:

         16.1.1   any Radiation emitted in breach of Environmental Law or
                  Industry Guidelines in force on the date of this Agreement
                  from any Relevant Equipment (i) on or prior to Closing and
                  (ii) after Closing until such time as the Purchaser has
                  concluded Remedial Action in relation thereto; and

         16.1.2   any Remedial Action which is reasonably necessary, in relation
                  to the existence, emission or effect of any Radiation emitted
                  from any Relevant Equipment in breach of such Environmental
                  Law in force at the time of this Agreement or Industry
                  Guidelines, to procure compliance with Environmental Law and
                  Industry Guidelines, or, if reasonably practicable and cheaper
                  than undertaking such Remedial Action, the reasonable cost of
                  purchasing any land on which the Seller and the Purchaser
                  agree that Radiation levels are in breach of Environmental Law
                  in force at the time of this Agreement or Industry Guidelines.

16.2     Asbestos

         Subject to Clause 16.3, the Seller shall indemnify and hold harmless
         and keep indemnified the Purchaser (for itself and for any member of
         the Purchaser's Group) from and against any and all Losses which are
         suffered or incurred by the Purchaser or any member of the Purchaser's
         Group in connection with the presence of Asbestos at any Property and
         arising out of or in relation to:

         16.2.1   the failure of any Group Company to be in compliance with the
                  Asbestos Regulations on or prior to Closing;

         16.2.2   the reasonable costs of any Remedial Action necessary to
                  procure the compliance as soon as reasonably practicable after
                  Closing of the Group Companies with the Asbestos Regulations;
                  and

         16.2.3   the exposure prior to Closing of any person to Asbestos or
                  Asbestos-containing materials in the fabric of any building or
                  man-made structure owned, occupied or used by any Group
                  Company (i) for any period prior to Closing; and (ii) until
                  such time as the Purchaser has taken such measures as are
                  necessary for any applicable Group Company to comply with the
                  Asbestos Regulations.

16.3     Limitation of the Seller's Liability

         16.3.1   The Seller shall not be liable to indemnify the Purchaser
                  under Clause 16.1 or Clause 16.2:

                  (i)      in relation to the carrying out of Remedial Action
                           other than Remedial Action required to achieve
                           compliance with Environmental Law, Industry
                           Guidelines or the Asbestos Regulations;

                  (ii)     in relation to the cost of Remedial Action, to the
                           extent that such Remedial Action has been
                           specifically budgeted for in the Accounts or the



                                       55



                           Management Accounts or the Capital Plan in the
                           Strategic Review being the following:

                           (a)      (pound)4,750,000 (four million, seven
                                    hundred and fifty thousand pounds Sterling)
                                    for ICNIRP occupational compliance; and

                           (b)      (pound)100,000 (one hundred thousand pounds
                                    Sterling) for asbestos surveys;

                  (iii)    if and to the extent that the relevant Losses are
                           recovered by the Purchaser under the terms of any
                           insurance policy for the time being in force the
                           Purchaser agreeing to take all reasonable steps as
                           far as practicable to retain the levels and type of
                           insurance that Crown Castle UK has in place at the
                           time of Closing (provided such insurance cover is
                           available in the market on commercially reasonable
                           terms);

                  (iv)     if and to the extent that any claim results from or
                           is increased as a result of the Purchaser or any of
                           its Representatives, disclosing information to any
                           Governmental Entity or any other person except where:

                           (a)      such disclosure is required by Environmental
                                    Law or by court order;

                           (b)      required in writing by any Governmental
                                    Entity;

                           (c)      such disclosure is agreed or determined to
                                    facilitate Remedial Action; or

                           (d)      prior notice has been given to the Seller
                                    and the Purchaser has taken all such steps
                                    as may be reasonable and practicable in the
                                    circumstances to agree the contents of such
                                    disclosure with the Seller before making
                                    such disclosure (the Seller not to
                                    unreasonably withhold or delay any such
                                    agreement);

                  (v)      if and to the extent that any claim results from or
                           is increased by any Environmental Law which comes
                           into force or is amended after the date of this
                           Agreement; or

                  (vi)     if and to the extent that any claim directly or
                           indirectly results from or is increased by:

                           (a)      any act or omission on the part of the
                                    Purchaser or any member of the Purchaser's
                                    Group or any of their respective
                                    Representatives after Closing which any
                                    reasonable or prudent operator of the
                                    Company's business immediately prior to the
                                    date of this Agreement ought reasonably to
                                    have been aware of; or

                           (b)      any negligent act or omission on the part of
                                    the Purchaser or any member of the
                                    Purchaser's Group or any of their respective
                                    Representatives, after Closing; or

                           (c)      any material change of use or development by
                                    any Group Company of all or part of any
                                    Property or land adjoining any Property
                                    after the date of this Agreement but
                                    excluding any Ordinary Course Construction.


                                       56




         16.3.2   The Purchaser shall reimburse to the Seller any amount
                  subsequently recovered by or paid to the Purchaser from or by
                  any third party in respect of any matter or Liability in
                  respect of which the Seller has paid any sum to the Purchaser
                  under Clause 16.1 or 16.2.

16.4     Conduct of Claims

         16.4.1   Without prejudice to Clause 16.5, if any claim is received by
                  or any matter or circumstance comes to the attention of the
                  Purchaser which could reasonably be anticipated to give rise
                  to a Liability for which the Seller may be liable under Clause
                  16.1 or 16.2:

                  (i)      the Purchaser shall give Notice to the Seller as soon
                           as reasonably practicable and in any event within 20
                           Business Days of becoming aware of it;

                  (ii)     the Purchaser shall give to the Seller reasonable
                           access to all information relevant to any claim
                           pursuant to Clause 16.1 and/or Clause 16.2 to enable
                           the Seller to investigate thoroughly such claim and
                           its potential Liability in respect of such claim or
                           matter other than such access as would compromise any
                           legal privilege or evidence of the Purchaser;

                  (iii)    as regards any such claim the Purchaser shall take
                           such action as the Seller may reasonably request in
                           writing to appeal, avoid, compromise, defend, dispute
                           or resist the claim and any adjudication in respect
                           thereof; and

                  (iv)     the Purchaser shall not admit, discharge, pay or
                           settle any such claim without the prior written
                           consent of the Seller (such consent not to be
                           unreasonably withheld or delayed).

         16.4.2   The action which the Seller may reasonably request under
                  Clause 16.4.1(iii) shall include (without limitation) allowing
                  the Seller in the name of the Purchaser to take complete
                  control of the conduct, handling and settlement of any such
                  claim, including the cost of litigation and of any appeal or
                  any negotiations and the appointment of and the giving of
                  instructions to legal representatives for that purpose,
                  provided that the Seller shall:

                  (i)      keep the Purchaser informed of all material steps
                           proposed by it;

                  (ii)     consult as fully as is reasonably practicable with
                           the Purchaser and take account of the Purchaser's
                           reasonable representations;

                  (iii)    not take any action in the name of the Purchaser as
                           may adversely affect the goodwill or good name of the
                           Purchaser or the value of the Purchaser's business;
                           and

                  (iv)     not admit, discharge, pay or settle any such claim
                           without the prior written consent of the Purchaser
                           (such consent not to be unreasonably withheld or
                           delayed).

         16.4.3   The provisions of this Clause 16.4 shall not apply to any
                  claim insofar as it relates to the carrying out of any
                  Remedial Action. The procedure for dealing with any such claim
                  is set out in Clause 16.5.


                                       57




16.5     Remedial Action by Purchaser after Closing

         16.5.1   Within six months of Closing the Purchaser shall identify any
                  Remedial Action it considers necessary:

                  (a)      to procure the compliance of the Group Companies with
                           Environmental Law and Industry Guidelines in respect
                           of Radiation emitted from any Relevant Equipment;
                           and/or

                  (b)      to procure the compliance of the Group Companies with
                           the Asbestos Regulations in respect of any Property.

         16.5.2   The Purchaser shall notify the Seller within six months of
                  Closing of any Remedial Action identified under Clause 16.5.1
                  and shall provide the Seller with reasonable details of the
                  identified Remedial Action and any correspondence received
                  from a Governmental Entity that relates thereto; provided (a)
                  that the provision of such notification shall not prevent the
                  Purchaser from pursuing further Remedial Action as a result of
                  any claim for Losses made within four years following Closing
                  under Clauses 16.1 and 16.2 in addition to that set out in the
                  notification; and (b) that the parties agree that the
                  procedure set out in this Clause 16.5 to agree the cost nature
                  and extent of Remedial Action shall apply to such further
                  Remedial Action.

         16.5.3   The Seller shall notify the Purchaser within 20 Business Days
                  of receipt of the Purchaser's notice under Clause 16.5.2
                  whether it agrees with the cost, nature and extent of the
                  Remedial Action identified by the Purchaser.

         16.5.4   If the Seller notifies the Purchaser that it agrees with the
                  Remedial Action identified by the Purchaser then the Purchaser
                  shall, at the cost of the Seller, (subject always to Clause
                  9.4.1(ii)) carry out the Remedial Action identified by it and
                  agreed by the Seller and the provisions of Clause 16.5.5 shall
                  apply; save that if the Seller notifies the Purchaser that it
                  does not agree with the cost, nature or extent of the Remedial
                  Action proposed by the Purchaser, then the provisions of
                  Clause 16.7 shall apply, provided that if the Seller does not
                  respond to the Purchaser's notice under Clause 16.5.2 the
                  Seller shall be deemed to have agreed to the terms of the
                  notice.

         16.5.5   The Purchaser shall carry out any Remedial Action identified
                  by it under Clause 16.5.2 to procure compliance with
                  Environmental Law and Industry Guidelines and the Asbestos
                  Regulations as soon as reasonably practicable, having regard
                  to the nature and extent of the works following the earlier
                  of:

                  (i)      the date the Seller notifies the Purchaser or is
                           deemed to have notified the Purchaser that it agrees
                           with the Remedial Action identified by the Purchaser;
                           or

                  (ii)     the date the Expert's decision is notified to the
                           parties (if any dispute is referred to an Expert
                           under Clause 16.7).

         16.5.6   Any Remedial Action in respect of which this Clause 16 is to
                  apply shall be performed in a commercially reasonable,
                  cost-effective manner using the most sound materials available
                  for the purpose.

         16.5.7   The Purchaser shall afford to the Seller and its
                  Representatives all such reasonable access to Relevant
                  Equipment or the Properties as is required to



                                       58



                  enable the Seller to confirm to its reasonable satisfaction
                  that any Remedial Action is or has been undertaken in
                  compliance with Clauses 16.5.5 and 16.5.6 above.

16.6     Seller's Right to carry out Remedial Action prior to Closing

         16.6.1   Without prejudice to Clause 5.1, the Seller and the Purchaser
                  agree that between the date of this Agreement and Closing the
                  Seller shall have the right to carry out or procure that Crown
                  Castle UK shall carry out any Remedial Action it considers
                  reasonably necessary to reduce or mitigate its liability under
                  Clauses 16.1 and 16.2, provided always that:

                  (i)      the Seller shall provide the Purchaser promptly with
                           details of all such works and full access to and
                           information regarding the said works; and

                  (ii)     the Seller shall consult during the course of such
                           works as fully as is reasonably practicable with the
                           Purchaser in relation to such works and take account
                           of the Purchaser's reasonable representations.

         16.6.2   Following completion of any such works carried out under this
                  Clause the Purchaser shall have full right of reasonable
                  access and inspection and shall either confirm in writing that
                  the works have been carried out to its reasonable satisfaction
                  or in the alternative require the Seller to carry out such
                  further works as it considers reasonably necessary to secure
                  compliance with Environmental Law, Industry Guidelines and the
                  Asbestos Regulations and any dispute in connection thereto
                  shall be referred to an Expert under Clause 16.7.

16.7     Disputes

         16.7.1   The Seller and the Purchaser shall negotiate in good faith
                  with a view to resolving any dispute between them as to the
                  cost, extent or nature of any Remedial Action to be carried
                  out. If they are unable to resolve any such dispute within 20
                  Business Days after the date of notification of any objection
                  pursuant to Clause 16.5.4 above, the matter in dispute shall
                  be referred for decision by the Seller or the Purchaser to an
                  appropriate independent expert (the "Expert") for resolution.
                  The Expert shall be appointed in default of agreement between
                  the Seller and the Purchaser within the five ensuing Business
                  Days by the Chairman for the time being of the Institute of
                  Environmental Management and Assessment.

         16.7.2   Where any dispute is referred for decision by an Expert:


                  (i)      the Seller and the Purchaser shall promptly provide
                           the Expert with such information as he may reasonably
                           require to enable him to reach his decision;

                  (ii)     the Expert shall act as an expert and not as an
                           arbitrator;

                  (iii)    the Expert's decision (which shall be given by him in
                           writing stating his reasons for it) shall be final
                           and binding on the Seller and the Purchaser (save in
                           case of manifest error); and

                  (iv)     the Expert's costs and expenses shall be borne by the
                           Seller and the Purchaser in such proportions as the
                           Expert may decide to be fair and reasonable in the
                           circumstances or, if no such decision is made by the
                           Expert, by the Purchaser and the Seller in equal
                           proportions.


                                       59




17       Repayment of Intra-Group balances

17.1     On the Closing Date, the Purchaser shall procure that the relevant
         Group Company shall pay the Settlement Amount by wire transfer of
         immediately available funds to the Seller's Nominated Account.

17.2     The Seller and the Purchaser agree that the Settlement Amount is
         obtained by netting (a) an amount paid by the Seller (as agent of the
         relevant members of the Seller's Group) to the Purchaser (as agent of
         the relevant Group Companies) sufficient to ensure that the Intra-Group
         Receivables are fully discharged; and (b) an amount paid by the
         Purchaser (as agent of the relevant Group Company) to the Seller (as
         agent of the relevant members of the Seller's Group), sufficient to
         ensure that the Intra-Group Payables are fully discharged.

18       Guarantee by the Guarantor

18.1     In consideration of the Seller entering into this Agreement, the
         Guarantor unconditionally and irrevocably guarantees to the Seller
         (which takes the benefit of this guarantee for itself and as trustee
         for each Group Company) the due and punctual performance of all the
         obligations and Liabilities of the Purchaser under or otherwise arising
         out of or in connection with this Agreement (as any of such obligations
         and Liabilities may from time to time be varied, extended, increased or
         replaced) but subject to the same limit on the Liability as applies to
         the Purchaser under this Agreement.

18.2     If any obligation or Liability of the Purchaser expressed to be the
         subject of the guarantee contained in this Clause 18 (the "NGT
         Guarantee") is not or ceases to be valid or enforceable against the
         Purchaser (in whole or in part) on any ground whatsoever (including,
         but not limited to, any defect in or want of powers of the Purchaser or
         irregular exercise of such powers, or any lack of authority on the part
         of any person purporting to act on behalf of the Purchaser, or any
         legal or other limitation, disability or incapacity, or any change in
         the constitution of, or any amalgamation or reconstruction of, or the
         liquidation, administration or insolvency of the Purchaser), the
         Guarantor shall nevertheless be liable to the Seller in respect of that
         purported obligation or liability as if the same were fully valid and
         enforceable and the Guarantor were the principal debtor in respect
         thereof.

18.3     The liability of the Purchaser under the NGT Guarantee shall not be
         discharged or affected in any way by:

         18.3.1   any variation, extension, increase, renewal, determination,
                  release or replacement of this Agreement;

         18.3.2   the Seller granting any time, indulgence, concession, relief,
                  discharge or release to the Purchaser or any other person or
                  realising, giving up, agreeing to any variation, renewal or
                  replacement of, releasing, abstaining from or delaying in
                  taking advantage of or otherwise dealing with any securities
                  from or other rights or remedies which it may have against the
                  Purchaser or any other person; or


                                       60




         18.3.3   any other matter or thing which, but for this provision, might
                  exonerate or affect the liability of the Guarantor (including,
                  without limitation, the termination, supervening illegality or
                  invalidity of this Agreement).

18.4     The NGT Guarantee is in addition to any other security or right now or
         hereafter available to the Purchaser and is a continuing security
         notwithstanding any liquidation, administration, insolvency or other
         incapacity of the Purchaser or the Guarantor.

18.5     Until the full and final discharge of all obligations and Liabilities
         which are the subject of the NGT Guarantee, the Guarantor:

         18.5.1   waives all of its rights of subrogation, reimbursement and
                  indemnity against the Purchaser and agrees not to demand or
                  accept any security from the Purchaser in respect of any such
                  rights and not to prove in competition with the Seller in the
                  liquidation or insolvency of the Purchaser; and

         18.5.2   agrees that it will not claim or enforce payment (whether
                  directly or by set-off, counterclaim or otherwise) of any
                  amount which may be or has become due to the Guarantor by the
                  Purchaser or any other person liable to the Seller in respect
                  of the obligations hereby guaranteed if and so long as the
                  Purchaser is in default under this Agreement.



                                       61



In witness whereof this Agreement has been duly executed.



SIGNED by
on behalf of CROWN CASTLE                                    /s/ E. Blake Hawk
INTERNATIONAL CORP.:



SIGNED by
on behalf of NGG TELECOMS INVESTMENT                         /s/ Edward Astle
LIMITED:




SIGNED by
on behalf of NATIONAL GRID HOLDINGS                          /s/ Edward Astle
ONE PLC:







                                       62





                                   Schedule 1

                        The Company and the Subsidiaries

1        Particulars of the Company



                                                           
       ----------------------------------------------------- -------------------------------------------
       Name of Company:                                      Crown Castle UK Holdings Limited
       ----------------------------------------------------- -------------------------------------------
       Registered number:                                    3242381
       ----------------------------------------------------- -------------------------------------------
       Registered office:                                    Warwick Technology Park
                                                             Gallows Hill
                                                             Heathcote Lane
                                                             Warwick CV34 6TN
       ----------------------------------------------------- -------------------------------------------
       Date and place of incorporation:                      27 August 1996(1)
                                                             England and Wales
       ----------------------------------------------------- -------------------------------------------
       Issued share capital:                                 333,595,225 ordinary shares of(pound)1 each
       ----------------------------------------------------- -------------------------------------------
       Authorised share capital:                             (pound)500,000,000 divided into 500,000
                                                             ordinary shares of(pound)1 each
       ----------------------------------------------------- -------------------------------------------
       Registered shareholders and shares held:              Crown Castle UK Holding Corp
                                                             333,595,225
       ----------------------------------------------------- -------------------------------------------
       Beneficial shareholders and shares held:              None
       ----------------------------------------------------- -------------------------------------------
       Directors:                                            Peter Graham Abery
                                                             John Patrick Kelly
                                                             William Benjamin Moreland
                                                             Andrew Sloey
       ----------------------------------------------------- -------------------------------------------
       Secretary:                                            Angela Mary Dennehy
       ----------------------------------------------------- -------------------------------------------
       Accounting reference date:                            31 December
       ----------------------------------------------------- -------------------------------------------
       Auditors:                                             KPMG LLP
       ----------------------------------------------------- -------------------------------------------


2        Particulars of the Subsidiaries

       ---------------------------------------------------- --------------------------------------------
       Name of Subsidiary:                                  Crown Castle UK Limited
       ---------------------------------------------------- --------------------------------------------
       Registered number:                                   3196207
       ---------------------------------------------------- --------------------------------------------
       Registered office:                                   Warwick Technology Park
                                                            Gallows Hill
                                                            Heathcote Lane
                                                            Warwick CV34 6TN
       ---------------------------------------------------- --------------------------------------------
       Date and place of incorporation:                     9 May 1996(2)
                                                            England and Wales
       ---------------------------------------------------- --------------------------------------------
       Issued share capital:                                287,030,156 ordinary shares of(pound)1 each
       ---------------------------------------------------- --------------------------------------------
       Authorised share capital:                            (pound)500,000,000 in 500,000 ordinary shares
                                                            of (pound)1 each
       ---------------------------------------------------- --------------------------------------------
       Registered shareholders and shares held:             Crown Castle UK Holdings Limited
                                                            287,030,156
       ---------------------------------------------------- --------------------------------------------


- ------------------
1    The company was incorporated under the name "Diohold Limited" as a private
     limited company.
2    The company was incorporated under the name "Hackremco Limited (No. 1129)"
     as a private limited company.



                                       63





                                                           
       ---------------------------------------------------- --------------------------------------------
       Beneficial shareholders and shares held:             None
       ---------------------------------------------------- --------------------------------------------
       Directors:                                           Peter Graham Abery
                                                            John Patrick Kelly
                                                            William Benjamin Moreland
                                                            Andrew Sloey
       ---------------------------------------------------- --------------------------------------------
       Secretary:                                           Angela Mary Dennehy
       ---------------------------------------------------- --------------------------------------------
       Accounting reference date:                           31 December
       ---------------------------------------------------- --------------------------------------------
       Auditors:                                            KPMG LLP
       ---------------------------------------------------- --------------------------------------------


       ---------------------------------------------------- --------------------------------------------
       Name of Subsidiary:                                  Crown Castle UK Finance plc
       ---------------------------------------------------- --------------------------------------------
       Registered number:                                   3347387
       ---------------------------------------------------- --------------------------------------------
       Registered office:                                   Warwick Technology Park
                                                            Gallows Hill
                                                            Heathcote Lane
                                                            Warwick CV34 6TN
       ---------------------------------------------------- --------------------------------------------
       Date and place of incorporation:                     8 April 1997(3)
                                                            England and Wales
       ---------------------------------------------------- --------------------------------------------
       Issued share capital:                                50,000 ordinary shares fully paid
       ---------------------------------------------------- --------------------------------------------
       Authorised share capital:                            (pound)50,000 divided into 50,000 ordinary
                                                            shares of (pound)1 each
       ---------------------------------------------------- --------------------------------------------
       Registered shareholders and shares held:             Crown Castle UK Holdings Limited 1
                                                            Crown Castle UK Limited 49,999
       ---------------------------------------------------- --------------------------------------------
       Beneficial shareholders and shares held:             None
       ---------------------------------------------------- --------------------------------------------
       Directors:                                           Peter Graham Abery
                                                            John Patrick Kelly
                                                            William Benjamin Moreland
                                                            Andrew Sloey
       ---------------------------------------------------- --------------------------------------------
       Secretary:                                           Angela Mary Dennehy
       ---------------------------------------------------- --------------------------------------------
       Accounting reference date:                           31 December
       ---------------------------------------------------- --------------------------------------------
       Auditors:                                            KPMG LLP
       ---------------------------------------------------- --------------------------------------------


       ---------------------------------------------------- --------------------------------------------
       Name of Subsidiary:                                  Crown Castle Communications Limited
       ---------------------------------------------------- --------------------------------------------
       Registered number:                                   2903056
       ---------------------------------------------------- --------------------------------------------
       Registered office:                                   Warwick Technology Park
                                                            Gallows Hill
                                                            Heathcote Lane
                                                            Warwick CV34 6TN
       ---------------------------------------------------- --------------------------------------------
       Date and place of incorporation:                     28 February 1994(4)
                                                            England and Wales
       ---------------------------------------------------- --------------------------------------------
       Issued share capital:                                2,500,100 ordinary shares fully paid
       ---------------------------------------------------- --------------------------------------------
       Authorised share capital:                            (pound)3,000,000 in 3,000,000 ordinary
       ---------------------------------------------------- --------------------------------------------


- --------------------
3    The company was incorporated under the name "Premtrade Limited" as a
     private company on 8 April 1997.
4    The company was incorporated under the name "Millennium Communications
     Limited" as a private limited company.




                                       64





                                                           
       ---------------------------------------------------- --------------------------------------------
                                                            shares of (pound)1 each
       ---------------------------------------------------- --------------------------------------------
       Registered shareholders and shares held:             Crown Castle UK Limited 2,500,100
       ---------------------------------------------------- --------------------------------------------
       Beneficial shareholders and shares held:             None
       ---------------------------------------------------- --------------------------------------------
       Directors:                                           Peter Graham Abery
                                                            Andrew Sloey
       ---------------------------------------------------- --------------------------------------------
       Secretary:                                           Angela Mary Dennehy
       ---------------------------------------------------- --------------------------------------------
       Accounting reference date:                           31 December
       ---------------------------------------------------- --------------------------------------------
       Auditors:                                            KPMG LLP
       ---------------------------------------------------- --------------------------------------------

       ---------------------------------------------------- --------------------------------------------
       Name of Subsidiary:                                  Terracom Estates Limited
       ---------------------------------------------------- --------------------------------------------
       Registered number:                                   03120642
       ---------------------------------------------------- --------------------------------------------
       Registered office:                                   Warwick Technology Park
                                                            Gallows Hill
                                                            Heathcote Lane
                                                            Warwick CV34 6TN
       ---------------------------------------------------- --------------------------------------------
       Date and place of incorporation:                     1 November 1995(5)
                                                            England and Wales
       ---------------------------------------------------- --------------------------------------------
       Issued                                               share capital:
                                                            100,000 A ordinary
                                                            shares fully paid,
                                                            10,840 B ordinary
                                                            shares full paid,
                                                            2,410 C ordinary
                                                            shares fully paid,
                                                            4,820 E ordinary
                                                            shares fully paid
                                                            and 2,410 F ordinary
                                                            shares fully paid
       ---------------------------------------------------- --------------------------------------------
       Authorised share capital:                            (pound)2,000 divided into 110,000 A ordinary
                                                            shares of 1p each, 15,000 B ordinary
                                                            shares of 1p each, 15,000 C ordinary
                                                            shares of 1p each, 30,000 D ordinary
                                                            shares of 1p each, 15,000 E ordinary
                                                            shares of 1p each and 15,000 F ordinary
                                                            shares of 1p each
       ---------------------------------------------------- --------------------------------------------
       Registered shareholders and shares held:             Crown Castle UK Limited 120,480
       ---------------------------------------------------- --------------------------------------------
       Beneficial shareholders and shares held:             None
       ---------------------------------------------------- --------------------------------------------
       Directors:                                           Peter Graham Abery
                                                            Andrew Sloey
                                                            John Joseph Ward
       ---------------------------------------------------- --------------------------------------------
       Secretary:                                           Angela Mary Dennehy
       ---------------------------------------------------- --------------------------------------------
       Accounting reference date:                           31 December
       ---------------------------------------------------- --------------------------------------------
       Auditors:                                            KPMG LLP
       ---------------------------------------------------- --------------------------------------------

       ---------------------------------------------------- --------------------------------------------
       Name of Subsidiary:                                  Terracom Design & Development Limited
       ---------------------------------------------------- --------------------------------------------
       Registered number:                                   02816853
       ---------------------------------------------------- --------------------------------------------
       Registered office:                                   Warwick Technology Park
                                                            Gallows Hill
                                                            Heathcote Lane
                                                            Warwick CV34 6TN
       ---------------------------------------------------- --------------------------------------------



- --------------------
5    The company was incorporated under the name "Plougmann Vingtost & Partners
     Limited" as a private limited company.




                                       65





                                                           
       ---------------------------------------------------- --------------------------------------------
       Date and place of incorporation:                     11 May 1993(6)
                                                            England and Wales
       ---------------------------------------------------- --------------------------------------------
       Issued share capital:                                10,000 ordinary shares fully paid
       ---------------------------------------------------- --------------------------------------------
       Authorised share capital:                            (pound)10,000 divided into 10,000 ordinary
                                                            shares of (pound)1 each
       ---------------------------------------------------- --------------------------------------------
       Registered shareholders and shares held:             Terracom Estates Limited 10,000
       ---------------------------------------------------- --------------------------------------------
       Beneficial shareholders and shares held:             None
       ---------------------------------------------------- --------------------------------------------
       Directors:                                           Peter Graham Abery
                                                            Andrew Sloey
                                                            John Joseph Ward
       ---------------------------------------------------- --------------------------------------------
       Secretary:                                           Angela Mary Dennehy
       ---------------------------------------------------- --------------------------------------------
       Accounting reference date:                           31 December
       ---------------------------------------------------- --------------------------------------------
       Auditors:                                            KPMG LLP
       ---------------------------------------------------- --------------------------------------------

       ---------------------------------------------------- --------------------------------------------
       Name of Subsidiary:                                  Triscape Planning Limited

       ---------------------------------------------------- --------------------------------------------
       ---------------------------------------------------- --------------------------------------------
       Registered number:                                   03246721
       ---------------------------------------------------- --------------------------------------------
       ---------------------------------------------------- --------------------------------------------
       Registered office:                                   Warwick Technology Park
                                                            Gallows Hill
                                                            Heathcote Lane
                                                            Warwick CV34 6TN
       ---------------------------------------------------- --------------------------------------------
       Date and place of incorporation:                     6 September 1996(7)
                                                            England and Wales
       ---------------------------------------------------- --------------------------------------------
       Issued share capital:                                1,000 ordinary shares fully paid
       ---------------------------------------------------- --------------------------------------------
       Authorised share capital:                            (pound)1,000 in 1,000 ordinary shares of
                                                            (pound)1 each
       ---------------------------------------------------- --------------------------------------------
       Registered shareholders and shares held:             Terracom Estates Limited 1,000
       ---------------------------------------------------- --------------------------------------------
       Beneficial shareholders and shares held:             None
       ---------------------------------------------------- --------------------------------------------
       Directors:                                           Peter Graham Abery
                                                            Andrew Sloey
                                                            John Joseph Ward
       ---------------------------------------------------- --------------------------------------------
       Secretary:                                           Angela Mary Dennehy
       ---------------------------------------------------- --------------------------------------------
       Accounting reference date:                           31 December
       ---------------------------------------------------- --------------------------------------------
       Auditors:                                            KPMG LLP
       ---------------------------------------------------- --------------------------------------------

       ---------------------------------------------------- --------------------------------------------
       Name of Subsidiary:                                  Mercator Developments Limited
       ---------------------------------------------------- --------------------------------------------
       Registered number:                                   3844675
       ---------------------------------------------------- --------------------------------------------
       ---------------------------------------------------- --------------------------------------------
       Registered office:                                   Warwick Technology Park
                                                            Gallows Hill
                                                            Heathcote Lane
                                                            Warwick CV34 6TN
       ---------------------------------------------------- --------------------------------------------
       Date and place of incorporation:                     20 September 1999
                                                            England and Wales
       ---------------------------------------------------- --------------------------------------------


- --------------------
6    The company was incorporated under the name "Rosa Developments Limited" as
     a private limited company.
7    The company was incorporated under the name "Terracom Northern Limited" as
     a private limited company.



                                       66





                                                           
       ---------------------------------------------------- --------------------------------------------
       Issued share capital:                                2 ordinary shares fully paid
       ---------------------------------------------------- --------------------------------------------
       Authorised share capital:                            (pound)1,000 in 1,000 ordinary shares of
                                                            (pound)1 each
       ---------------------------------------------------- --------------------------------------------
       Registered shareholders and shares held:             Crown Castle UK Limited 2
       ---------------------------------------------------- --------------------------------------------
       Beneficial shareholders and shares held:             None
       ---------------------------------------------------- --------------------------------------------
       Directors:                                           Peter Graham Abery
       ---------------------------------------------------- --------------------------------------------
       Secretary:                                           Angela Mary Dennehy
       ---------------------------------------------------- --------------------------------------------
       Accounting reference date:                           31 December
       ---------------------------------------------------- --------------------------------------------
       Auditors:                                            None
       ---------------------------------------------------- --------------------------------------------

       ---------------------------------------------------- --------------------------------------------
       Name of Subsidiary:                                  Crown Castle UK Pension Trust Limited
       ---------------------------------------------------- --------------------------------------------
       Registered number:                                   3390775
       ---------------------------------------------------- --------------------------------------------
       Registered office:                                   Warwick Technology Park
                                                            Gallows Hill
                                                            Heathcote Lane
                                                            Warwick CV34 6TN
       ---------------------------------------------------- --------------------------------------------
       Date and place of incorporation:                     23 June 1997(8)
                                                            England and Wales
       ---------------------------------------------------- --------------------------------------------
       Issued share capital:                                1 ordinary share fully paid
       ---------------------------------------------------- --------------------------------------------
       Authorised share capital:                            (pound)100 in 100 ordinary shares of
                                                            (pound)1 each
       ---------------------------------------------------- --------------------------------------------
       Registered shareholders and shares held:             Crown Castle UK Limited 1
       ---------------------------------------------------- --------------------------------------------
       Beneficial shareholders and shares held:             None
       ---------------------------------------------------- --------------------------------------------
       Directors:                                           Peter Graham Abery
                                                            Rita Dora
                                                            John Fitzsimons
                                                            Andrew Sloey
                                                            Alan Taylor
                                                            John Joseph Ward
       ---------------------------------------------------- --------------------------------------------
       Secretary:                                           Angela Mary Dennehy
       ---------------------------------------------------- --------------------------------------------
       Accounting reference date:                           31 December
       ---------------------------------------------------- --------------------------------------------
       Auditors:                                            None
       ---------------------------------------------------- --------------------------------------------



- --------------------
8    The company was incorporated under the name "Boxtrade Limited" as a private
     limited company.


                                       67



                                   Schedule 2

                            Retained Names and Marks
                                  (Clause 13.2)

Application Number:             UK 2,173,589
Class:                          6, 9, 12, 16, 19, 25, 36-38
Status:                         Registered
Application date:               30 July 1998
Journal reference:              6274, 4546

[CROWN CASTLE WAVE LOGO]

Conditions:    The applicant claims the colours red, purple, blue and green as
               an element of the second mark in the series.

Class          6: Name plaques, signs, sign boards; all of metal.
Class          9: Tapes, discs, CDs, CD-Roms, videos; luminous name plaques,
               signs and signboards.
Class          12: Cars, vans.
Class          16: Stationery items, stationery, paper, booklets, brochures,
               pamphlets, folders, binders, pens, pencils; name plaques, signs
               and signboards, all of paper or cardboard.
Class          19: Name plaques, signs, signboards.
Class          25: Articles of clothing; footwear; headgear; T-shirts, overalls.
Class          36: Site acquisition for the telecommunication, transmission and
               broadcasting industries.
Class          37: Planning, consultancy, installation and maintenance of
               broadcasting, telecommunication and transmission equipment,
               apparatus and instruments.
Class          38: Broadcasting, telecommunication, transmission and
               transmission mast site sharing services; provision of
               distribution and transmission network services.

Proprietor:    Crown Castle UK Ltd
               Warwick Technology Park
               Gallows Hill
               Heathcote Lane
               Warwick
               CV34 6TN

Agent:         Marks & Clerk
               57-60 Lincoln's Inn Fields
               London
               WC2A 3LS

Week Ending    History


                                       68





07 Aug 1998    Added
25 Sep 1998    New-App-Date Old:  30-Jan-1998
02 Apr 1999    Journal-Set New-Goods
30 Apr 1999    Status:  Advert1
13 Aug 1999    Registration
20 Aug 1999    Status:  Registered
03 Dec 1999    New-Proprietor Old:  Castle Transmission International Ltd
13 Feb 2002    Other-Update





                                       69



Serial Number:                  US 75-632792
Application Number:             2,568,828
Class:                          9, 16, 19-21, 25, 36-38
Status:                         Registered
Application date:               3 Feb 1999
Registered:                     14 May 2002

[CROWN CASTLE WAVE LOGO]

I C Date:                       7 July 1998

Class          9: Pre-recorded tapes, discs, cds cd-roms, and
               videos about telecommunication network equipment
               and services, and information about specific bid
               proposals provided to customers concerning
               telecommunication network equipment services.

Class          16: Stationery items, namely, letterhead
               stationery, envelopes, memo pads, and facsimile
               transmission paper, labels, folders, binders,
               pens, pencils, printed paper signs; and
               booklets, brochures and pamphlets featuring
               information concerning telecommunication network
               equipment and services.

Class 19:      Non-luminous and non-mechanical signs not of metal.
Class 20:      Plaques and signboards.
Class 21:      Cups, plates and mugs.
Class 25:      Clothing, namely, footwear, hats, t-shirts and overalls.
Class          36: Telecommunications airtime brokerage
               services; cable television transmission; land
               acquisition, namely, real estate brokerage; real
               estate management; real estate development.

Class          37: Installation of broadcasting,
               telecommunication and transmission equipment,
               apparatus and instruments, namely, transmitters,
               antennas, combiners, multiplexers, in addition
               to antennae support structures, namely, maps and
               towers and ancillary equipment such as diesel
               generators and satellite disc installations.

Class          38: Television broadcasting, radio broadcasting,
               and broadcasting and transmission via wireless
               media of analog, digital, audio, video, pager,
               radio, microwave, television, data, and
               emergency signals; and television and radio
               transmission services in the nature of providing
               microwave links carrying television and video
               signals from the customers' television and radio
               studios to applicant's tower network.

Proprietor:    Crown Castle UK Ltd
               Warwick Technology Park


                                       70



               Gallows Hill Heathcote Lane
               Warwick
               United Kingdom CV34 6TN

Service:       Albert B. Kimball, JR.
               Bracewell & Patterson LLP
               711 Louisiana STE 2900
               Houston TX 77002


                                       71



Application Number:             CTM 1,535,475
Class:                          36-38
Status:                         Registered
Application date:               1 March 2000

[CROWN CASTLE WAVE LOGO]

Languages:                      English/Spanish

Class                           36: Telecommunication site acquisition services,
                                transmission site acquisition services, and
                                broadcasting site acquisition services, real
                                estate management, site management and real
                                estate development services.

Class                           37: Planning, consultancy, installation and
                                maintenance of broadcasting, telecommunication
                                and transmission equipment, apparatus and
                                instruments.

Class                           38: Broadcasting, telecommunication,
                                transmission and transmission mast site sharing
                                services; provision of distribution and
                                transmission network services.

Seniorities:                    2,173,589|1999 08 13 1:  GB

Proprietor:                     Crown Castle UK Ltd
                                Warwick Technology Park
                                Gallows Hill
                                Heathcote Lane,
                                CV34 6TN
                                Warwick
                                United Kingdom

Service:                        Marks & Clerk
                                Sussex House
                                83-85 Mosley Street
                                Manchester
                                M2 3LG
                                United Kingdom

Received by OHIM:               1 March 2000

Week Ending                     History
18 Sep 2000                     Status:  Advertised
09 Apr 2001                     Status:  Registered
31 Mar 2003                     Other-Update




                                       72



                                   Schedule 3

                               Closing Obligations
                                   (Clause 6)

1        Seller's Obligations

1.1      General Obligations

         On Closing, the Seller shall deliver or make available to the Purchaser
         the following:

         1.1.1    evidence that the Seller is authorised to execute this
                  Agreement;

         1.1.2    transfers of the Shares duly executed by the registered
                  holders in favour of the Purchaser or as it may direct
                  accompanied by the relative share certificates (or an express
                  indemnity in a form satisfactory to the Purchaser in the case
                  of any certificate found to be missing);

         1.1.3    the written resignations of all of the directors and
                  secretaries of each Group Company from their office as a
                  director or secretary and as an employee or as the Purchaser
                  may otherwise direct to take effect on the date of Closing
                  and, in particular, in relation to Peter Abery, evidence in a
                  form reasonably satisfactory to the Purchaser of (i) the
                  satisfaction in full of all costs and expenses relating to his
                  termination as an employee and international secondment under
                  a Severance Agreement dated 12 February 2004; and (ii) the
                  Seller's express written release of Peter Abery from all
                  post-termination non-compete restrictions in the British
                  Isles. The Seller's written acknowledgement and reiteration of
                  its sole responsibility for all costs and expenses relating to
                  the Severance Agreement described above shall satisfy the
                  requirement to (i) above;

         1.1.4    the written resignations of the auditors of each Group Company
                  to take effect on the date of Closing, with acknowledgements
                  signed by each of them in a form satisfactory to the Purchaser
                  to the effect that they have no claim against any Group
                  Company and containing the statement referred to in Section
                  394 of the Companies Act to the effect that there are no
                  circumstances connected with their resignation which they
                  consider should be brought to the notice of the members or
                  creditors of any Group Company;

         1.1.5    the certificates of incorporation, corporate seals (if any),
                  cheque books, statutory and other books of each Group Company
                  (duly written up to the date immediately before the Closing
                  Date) and the share certificates in respect of each of the
                  Subsidiaries;

         1.1.6    all the Books and Records of each Group Company and all title
                  deeds and other documentation relating to the Properties;

         1.1.7    (if the Purchaser so requires) an irrevocable power of
                  attorney (in the Agreed Terms) executed by the Seller in
                  favour of the Purchaser to enable the Purchaser (pending
                  registration of the relevant transfers) to exercise all voting
                  and other rights attaching to the Shares and to appoint
                  proxies for this purpose;

         1.1.8    evidence of release of the Liens on the Shares and the shares
                  of any Group Company existing pursuant to the Amended and
                  Restated Credit and Exchange Offer Agreement dated as of 10
                  October 2003, between Seller, Crown Castle


                                       73



                  Operating Company, Crown Castle International Corp de Puerto
                  Rico, J.P. Morgan Chase Bank as agent and the Lenders from
                  time to time, as defined therein;

         1.1.9    evidence reasonably satisfactory to the Purchaser of the
                  termination of the agreements (except for those agreements
                  identified in Section 6.4 of the Disclosure Letter) between
                  the Group Companies and the Seller or other members of the
                  Seller's Group;

         1.1.10   releases or waivers in the Agreed Terms in respect of the
                  Liens affecting any of the Shares or the shares of any Group
                  Company;

         1.1.11   a certificate signed by an executive officer with respect to
                  matters described in Clauses 8.1.1 and 8.1.2;

         1.1.12   evidence that the Seller has, or has procured that: in
                  relation to the software licences set out in Section 3.5(7)(a)
                  of the Disclosure Letter, that all reasonably necessary steps
                  have been taken so as to enter into such agreements or
                  arrangements with relevant third parties as are reasonably
                  necessary to ensure that the Group is able to continue to use
                  such software in substantially the same manner as it did
                  immediately prior to the date of this Agreement and that such
                  use will not infringe any third party Intellectual Property
                  rights after Closing in any material respect; and

         1.1.13   evidence that the Seller has, or has procured that in relation
                  to the software licences set out in Section 5.1.1 of the
                  Disclosure Letter, that all reasonably necessary steps have
                  been taken so as to obtain a sufficient number of additional
                  licences so as to ensure that the Group's use of that software
                  after Closing does not infringe any third party Intellectual
                  Property rights in any material respect.

2        The Purchaser's and Guarantor's Obligations

         On Closing, the Purchaser and Guarantor shall deliver or make available
         to the Seller:

         2.1.1    evidence that each of the Purchaser and the Guarantor are
                  authorised to execute this Agreement;

         2.1.2    a certificate signed by an executive officer of the Purchaser
                  with respect to the matters described in Clauses 8.5.1 and
                  8.5.2; and

         2.1.3    a certificate signed by an executive officer of the Guarantor
                  with respect to the matters described in Clauses 8.6.1 and
                  8.6.2.

3        Board Resolutions of the Group Companies

         On Closing, the parties shall join in procuring the passing of board
         resolutions of each Group Company inter alia:

         3.1.1    (if so required by the Purchaser) revoking all existing
                  authorities to bankers in respect of the operation of its bank
                  accounts and giving authority in favour of such persons as the
                  Purchaser may nominate to operate such accounts;

         3.1.2    approving in relation to the Company only the registration of
                  the transfer of the Shares referred to in paragraph 1.1.2 of
                  this Schedule 3 subject only to their being duly stamped;


                                       74




         3.1.3    accepting the resignations referred to in paragraph 1.1.3 of
                  this Schedule 3 and appointing such persons (within the
                  maximum number permitted by the Articles of Association) as
                  the Purchaser may nominate as directors and secretary;

         3.1.4    (if so required by the Purchaser) accepting the resignations
                  referred to in paragraph 1.1.4 of this Schedule 3 and
                  appointing alternative auditors;

         3.1.5    (if so required by the Purchaser) changing its registered
                  office in accordance with instructions given by the Purchaser;
                  and

         3.1.6    (if so required by the Purchaser) changing its accounting
                  reference date in accordance with instructions given by the
                  Purchaser.


                                       75



                                   Schedule 4

                 Determination of Closing Date Balance Sheet and
                              Completion Statements
                                   (Clause 7)
                                     Part 1


1        Accounting Policies and Bases

1.1      The Closing Date Balance Sheet and the Completion Statements shall be
         prepared in accordance with:

         1.1.1    the policies or bases as set out in Part 6 of Schedule 4;

         1.1.2    (subject to the requirements of Paragraph 1.1.1 which shall
                  prevail over the provisions of this Paragraph 1.1.2) in
                  accordance with the historical cost convention and the same
                  accounting policies, measurement bases and estimation
                  techniques as used in preparing the audited annual
                  consolidated accounts of the Group for the financial year
                  ended on 31 December 2003; and to the extent that the
                  accounting policies, measurement bases and estimation
                  techniques adopted in such accounts are different to those
                  applied in the preparation of the March Accounts arising
                  solely from the differences arising from the preparation of
                  the accounts for the year ended 31 December 2003 due to it
                  being a fiscal year end, the accounting policies, measurement
                  bases and estimation techniques used for the March Accounts
                  shall instead be adopted and consistently applied; and

         1.1.3    (subject to the requirements of Paragraph 1.1.1 and 1.1.2
                  which shall prevail over the provisions of this Paragraph
                  1.1.3), UK GAAP.

2        Completion Statements

2.1      Pursuant to Clause 7.2, during the 30 Business Days following the
         Seller's receipt of the Completion Statements, the Seller and its
         independent auditors shall be permitted to review the non-proprietary
         working papers relating to such Completion Statements. The Completion
         Statements shall become binding upon the parties and deemed finally
         determined on the 30th Business Day following delivery thereof unless
         the Seller gives notice of its disagreement with the Completion
         Statements (a "Notice of Disagreement") to the Purchaser prior to such
         date. For the avoidance of doubt, the 30 Business Day period referenced
         in this paragraph 2.1 shall not commence until (i) each Completion
         Statement shall have been delivered to the Seller and (ii) the
         non-proprietary working papers relating to each such Completion
         Statement shall have been delivered or made available to the Seller.

2.2      Any Notice of Disagreement shall be in writing and specify with
         reasonable detail the nature of any disagreement and amount disputed so
         asserted, and shall include only disagreements based on (i)
         mathematical errors, (ii) the Closing Working Capital Amount, the Final
         Closing Cash Amount and/or the Final Cash Deferred Income Amount set
         out in the Completion Statements not being calculated in the manner
         provided in the definition(s) thereof or (iii) the amounts recorded in
         the line items reflected on the Closing Date Balance Sheet not being
         obtained from and in accordance with the Books and Records or in
         accordance with the Accounting Policies.


                                       76



2.3      During the 20 Business Day period following the delivery of a Notice of
         Disagreement, the Seller and the Purchaser shall seek in good faith to
         resolve in writing any differences that they may have with respect to
         the matters specified in such Notice of Disagreement and to agree on
         final Completion Statements. During such period the Purchaser and its
         independent auditors shall have access to the non-proprietary working
         papers prepared in connection with such Notice of Disagreement. For the
         avoidance of doubt, the 20 Business Day period referenced in this
         paragraph 2.3 shall not commence until the non-proprietary working
         papers prepared in connection with such Notice of Disagreement shall
         have been delivered or made available to the Purchaser.

2.4      At the end of such 20 Business Day period, if the Seller and the
         Purchaser have not otherwise agreed, the Seller and the Purchaser shall
         submit to a nationally recognised independent public accounting firm in
         the United Kingdom as shall be reasonably agreed upon by the parties
         hereto in writing or in default of agreement, nominated by the
         President for the time being of the Institute of Chartered Accountants
         in England and Wales (the "Accounting Firm") for expert determination
         any and all matters that remain in dispute and were properly included
         in such Notice of Disagreement, in each case in the form of a written
         brief, copied to all parties. The Seller or the Purchaser, as
         applicable, shall have the right to respond in writing to the written
         brief, by submitting such response to the other party and the
         Accounting Firm. The Seller and the Purchaser shall jointly request
         that each expert determination be conducted in an expedited manner, and
         the Seller and the Purchaser shall, using reasonable endeavours, cause
         the Accounting Firm to render a determination resolving the matters
         submitted thereto within 30 Business Days after submission. The
         Accounting Firm may only resolve those disagreements permitted to be
         asserted in a Notice of Disagreement pursuant to paragraph 2.2 of this
         Schedule 4, and may not make any other determination. The Accounting
         Firm shall act as an expert and not as an arbitrator. The determination
         of the Accounting Firm shall be final and binding on the parties, and
         judgment may be entered upon the determination of the Accounting Firm
         in any court having jurisdiction over the party against which such
         determination is to be enforced.

2.5      The Seller and the Purchaser shall instruct the Accounting Firm to
         allocate the fees and expenses of the Accounting Firm incurred in
         connection with this paragraph 2 such that each party shall bear the
         portion of such fees and expenses incurred by the Accounting Firm in
         connection with matters in respect of which such party has not
         prevailed, and such fees and expenses shall be allocated between the
         Seller and the Purchaser as the Accounting Firm shall so determine.


                                       77



                                   Schedule 4

                                     Part 2
                               March Balance Sheet
                                  (Clause 1.1)




                                                             UK GAAP
                                                           (pound)'000
                                                          
Fixed Assets

Fixed & intangible assets, net                               532,253
Investments in advance to affiliates                               0
Investments in subsidiaries                                      100
Goodwill and other intangible assets, net                     39,787
Other assets, net                                                 24
                                                         ------------
Fixed Assets                                                 572,164
                                                         ============

Current Assets

Cash and Cash Equivalents                                     11,207
Receivables, net                                              27,376
Inventories                                                    4,275
Prepaid Expenses and other current assets                     26,265
                                                         ------------
Current Assets                                                69,123
                                                         ============
                                                             641,287
                                                         ============

Current Liabilities

Trade Accounts Payable                                      (15,915)
Other creditors                                              (7,393)
Accruals ( 1 yr                                             (87,535)
Accrued Interest                                                   0

Intercompany payables (receivables)                            4,763
Long-term debt, less current maturities                            0
                                                         ------------
Current Liabilities                                        (106,080)
                                                         ============

Long-term debt, less current maturities                            0
Inter-Company Notes                                        (109,270)
Site rental deposits and other liabilities                  (82,461)
                                                         ------------



                                       78






                                                             UK GAAP
                                                           (pound)'000
                                                          

Total Liabilities                                          (297,811)
                                                         ============
Net Current Assets/(Current Liabilities)                    (36,957)
                                                         ============
Total Assets less Current Liabilities                        535,207
                                                         ------------
Net Assets                                                   343,476
                                                         ============
Capital and Reserves                                         343,476
                                                         ============




                                       79



                                   Schedule 4
                                     Part 3
                           Base Working Capital Amount
                                  (Clause 1.1)



                                                                                      General Ledger
                                                                 (pound)'000             reference
                                                                          
Base Working Capital Assets                                         32,385
Less: Base Working Capital Liabilities                            (39,819)
                                                         ------------------
Base Working Capital Amount                                        (7,434)
                                                         ==================

Base Working Capital Assets

Trade Debtors                                                       28,134      1.1210; 1.1212.BTWS;
                                                                                     1.1390; 2.1390;
                                                                                        133-133.1390

Doubtful debts provision                                           (1,100)           1.1220; 2.1220;
                                                                                        133-133.1220

Other Debtors                                                          342             1.1390.DTVSL;
                                                                             1.1390.SUNDRY02; 1.1310

Less: Receivables in deferred income                              (15,113)                 See below
Less: VAT on receivables in deferred income                        (2,645)     17.5%* Receivables in
                                                                                     deferred income
                                                         ------------------
Total Receivables                                                    9,618
                                                         ==================

Total Prepayments                                                   18,492                 See below
                                                         ==================

Inventory                                                            4,851           1.1411; 1.1412;
                                                                                     1.1412.DOLPHIN;
                                                                                         1.1438.JNL;
                                                                                      1.1412.MODULE;
                                                                                    1.1412.OBSOLETE;
                                                                                      1.1412.TMOBILE
Inventory (purchase variance)                                                                 1.1420
                                                                      (70)

Inventory (provision)                                              (2,079)                    1.1450
WIP                                                                          All and only codes with
                                                                     1,573               prefix 1.15
                                                         ------------------
Total Inventory                                                      4,275
                                                         ==================

Total Receivables for Base Working Capital                           9,618
Total Prepayments for Base Working Capital                          18,492
                                                         -----------------




                                       80






                                                                                      General Ledger
                                                                 (pound)'000             reference
                                                                          

Total Inventory for Base Working Capital                             4,275
                                                         ------------------
Base Working Capital Assets                                         32,385
                                                         ==================
Base Working Capital Liabilities

Trade Creditors                                                    (8,819)                    1.4110
AP Logged Accruals                                                                    1.4212; 1.4130
                                                                       367

Goods Received Not Invoiced                                        (7,462)                    1.4120
                                                         ------------------
Total Payables                                                    (15,914)
                                                         ==================

Creditors - others                                                   (645)   1.4215; 1.4216; 1.4217;
                                                                                1.4219; 115-115.4213

Staff Expenses                                                         49            1.4271; 1.4278;
                                                                              1.4278.CONTROL; 1.4279

Tax Creditors                                                      (6,796)   1.4273; 1.4272; 1.4233;
                                                                                       1.4233.INPUT;
                                                                                      1.4233.OUTPUT;
                                                                                        1.4233.SUSP;
                                                                                1.4233.CORP; 2.4711;
                                                                                  133-133.4233.CORP;
                                                                                 133-133.4233.INPUT;
                                                                                133-133.4233.OUTPUT;
                                                                                   133-133.4233.SUSP

Accruals for Base Working Capital Liabilities                     (19,901)     1.4299; 1.4299.LEGAL;
                                                                                       1.4299.AUDIT;
                                                                                     1.4299.INVOICE;
                                                                                      1.4252.MANUAL;
                                                                                     1.4299.REBATES;
                                                                                      1.4251.MANUAL;
                                                                               1.4299.STAFF; 1.4253;
                                                                                        1.4299.CASH;
                                                                                         1.4251.PMS;
                                                                                    1.4251.PMSBTVAT;
                                                                                       1.4251.PMSBT;
                                                                                        115-115.4299
                                                                                      1.4299.INTERCO
                                                                                     1.4299.FASBACCR

Restructuring                                                                                 1.4780
                                                                     (339)

Finance Lease Creditor ( 1 yr                                                         1.4310.GENERAL
                                                                     (778)

Add FASB Liability                                                   1,742           1.4299.FASBACCR
Add: Powergen accrual                                                2,500
                                                         ------------------
Add:  Intercompany                                                     263            1.4299.INTERCO
                                                         ==================
Total Accrued Liabilities                                         (23,905)
                                                         ==================

Total Payables for Base Working Capital                           (15,914)




                                       81





                                                                                      General Ledger
                                                                 (pound)'000             reference
                                                                          
Total Accrued Liabilities for Base Working Capital                (23,905)
                                                         ------------------
Base Working Capital Liabilities                                  (39,819)
                                                         ==================



Prepayments

General Prepayment                                2,145                     1.1829
Insurance                                         1,167                     1.1822
Interest Receivable                                  15                     1.1829.INTEREST
Licences                                             32                     1.1829.LICENCE
Rates Non-Property                                1,118                     1.1824.MANUAL
Rents Non-Property                                   13                     1.1821.MANUAL
Revenue                                           3,410                     1.1826
Service Contracts                                   425                     1.1829.SERVICE
Staff Costs                                          21                     1.1829.STAFF
Utilities                                           191                     1.1829.UTILITIE
DLA                                                  50                     1.1829.DLA
Rates                                                 0                     1.1824.PMS
Rents                                             6,319                     1.1821.PMS
BT Reach                                          3,586                     1.1821.PMSBT
                                     -------------------
Total Prepayments                                18,492

NB. The non cash amounts attributable to H3G sites not yet at RFI has been
eliminated from Revenue Prepayments 1.1826

                                                         ==================

Receivables in Deferred Income

Site Share; Existing BT Rental; Site Share BT Reach                 11,875    1.4401; 1.4408.RENTAL;
                                                                                          1.4408.NEW

T Mobile NI Rollout                                                      0             1.4403.NITMOB
Other revenue deferrals                                              2,115                    1.4406
BBC DAB                                                                  0             1.4409.BBCDAB
DTT MUX C                                                            1,123          1.4409.(VARIOUS)
Northern Ireland Esat                                                    0             1.4409.NIESAT
                                                         ------------------
Total Receivables in Deferred Income                                15,113
                                                         ==================





                                       82



                                   Schedule 4
                                     Part 4
                      Estimated Cash Deferred Income Amount
                                  (Clause 1.1)



                                                            Illustrative Estimated  General Ledger reference
                                                                        at Closing

                                            (pound)'000                (pound)'000
                                                                           
Cash Deferred Income                  Account Balance    Unpaid as of Account Date
Site Share                                       22,500                             1.4401
Existing BT Rental                                  800                             1.4408.RENTAL
Site Share BT Reach                               3,800                             1.4408.NEW
                                     -------------------
Total Site share                                 27,100                        800
T Mobile NI Rollout                                 700                             1.4403.NITMOB
Other Revenue Deferrals                           3,400                      3,200  1.4406
BBC DAB                                             100                        100  1.4409.BBCDAB
DTT MUX C                                           900                        800  1.4409.(VARIOUS)
Northern Ireland Esat                               600                          0  1.4409.NIESAT
                                     ------------------- --------------------------
                                                 32,800                      4,900



Cash Deferred Income (including                  32,800
Unpaid Amounts)
less Unpaid Amounts                             (4,900)
                                     -------------------
Estimated Cash Deferred Income                   27,900
                                     -------------------




NB. The accounts "Transmission" GL ref 1.4402, "Broadcast" GL ref 1.4405 and
"DTT Mux D" GL ref 1.4409.(VARIOUS) are specifically excluded from Cash Deferred
Income


                                       83



                                   Schedule 4
                                     Part 5
               Illustration of Post-Closing Adjustment Mechanisms
                                  (Clause 7.5)

The Seller and the Purchaser agree that the following calculations are for
illustration purposes only, and that the Seller makes no representation or
warranty with respect to the accuracy of the hypothetical figures set out below,
as actual results may vary substantially.

Closing and Completion Adjustment Summary



At Closing                                                                              (pound)

                                                                                           
Closing Amount                                                                             150                 (a)
add Estimated Closing Cash Amount                                                           10                 (b)
                                                                                   ------------
Equity purchase price                                                                      160                 (c)
                                                                                   ------------
add Estimated Working Capital Adjustment Amount (or subtract if negative)                    3                 (d)
subtract Estimated Cash Deferred Income Amount                                            (10)                 (e)
- ---------------------------------------------------------------------------------- ------------ -------------------
Net amount payable to Seller at Closing for equity                                         153         (c)+(d)+(e)
Net amount payable to Seller at Closing for debt (Settlement Amount)                        50                 (f)
Total amount payable to Seller at Closing (j)=(c)+(d)+(e)+(f)                              203                 (j)
- ---------------------------------------------------------------------------------- ------------ -------------------

Post Closing 30 days

Final Closing Cash Amount                                                                   15
less Estimated Closing Cash Amount                                                        (10)
                                                                                   ------------
Adjustment payable) to or receivable from Seller                                             5                 (g)

Closing Working Capital Adjustment Amount                                                    3
less Final Working Capital Adjustment Amount                                               (3)
                                                                                   ------------
Adjustment payable to or receivable from Seller                                              -                 (h)

Final Cash Deferred Income Amount                                                          (8)
less Estimated Cash Deferred Income Amount                                                (10)
                                                                                   ------------
Adjustment payable to or receivable from Seller                                              2                 (i)
Increase / (decrease) in Consideration payable to Seller (k)=(g)+(h)+(j)                     7                 (k)
- ---------------------------------------------------------------------------------- ------------ -------------------
Total paid to Seller                                                                       210             (j)+(k)
Total paid for equity                                                                      160     (c)+(d)+(e)+(k)
                                                                                   ------------ -------------------
Total paid for debt                                                                         50                 (f)
- ---------------------------------------------------------------------------------- ------------ -------------------




                                       84



                                   Schedule 4
                                     Part 6
                          Specific Accounting Policies

1.1      Balances in respect of Transmission (ledger account1.4402), Broadcast
         Engineering (ledger account 1.4405 (and DTT Mux D (ledger account
         1.4409.(VARIOUS) shall not be included in Closing Working Capital
         Amount, Base Working Capital Amount, or Cash Deferred Income.

1.2      Balances in respect of DLA Surety (ledger account 1.1390.DLA) and ESAT
         Surety (ledger account 1.1829.ESAT) shall not be included in Closing
         Working Capital Amount or Base Working Capital Amount.

1.3      T-Mobile deferred income means non-cash income relating to the
         acquisition of T-Mobile sites that relates to future periods.

1.4      Install deferred income means capital contributions secured from
         customers as part of the install process that are being amortised over
         the term of the licence. Deferred income for Install revenue is
         calculated in accordance with the principles and requirements set out
         in the following documents: (i) April 2002 Discussion Document provided
         to Bob McLamb (KPMG Partner); (ii) Appendix A cost classifications; and
         (iii) Install Revenue Value White Paper, all of which are in the Agreed
         Terms.

1.5      Site Share deferred income means all billing that covers a future
         period is posted to deferred income at the point that the invoice is
         raised. Income relating to the current account period is released from
         deferred income over the term covered by the billing.

1.6      H3G Variation, H3G Reservation Fees and H3G Settlement deferred income
         are calculated in accordance with the requirements set out in the
         following documents: (i) Minutes of the CC/KPMG teleconference held on
         23 September 2003; and (ii) Memo to Mike Martin (KPMG Partner) dated 6
         October 2003, all of which are in the Agreed Terms.


                                       85



                                   Schedule 5

                         Warranties given by the Seller

1        Corporate Information

1.1      The Shares and the Group Companies

         1.1.1    The Seller, through a 100% owned subsidiary:

                  (i)      is the sole legal and beneficial owner of the Shares;
                           and

                  (ii)     has the right to exercise all voting and other rights
                           over the Shares.

         1.1.2    The Shares comprise the whole of the issued and allotted share
                  capital of the Company, have been properly and validly issued
                  and allotted and are each fully paid or credited as fully
                  paid.

         1.1.3    The shareholders specified in paragraph 2 of Schedule 1:

                  (i)      are the sole legal and beneficial owners of the
                           shares in the Subsidiaries; and

                  (ii)     have the right to exercise all voting and other
                           rights over such shares.

         1.1.4    The shares in the Subsidiaries comprise the whole of the
                  issued and allotted share capital of the Subsidiaries, have
                  been properly and validly issued and allotted and each are
                  fully paid or credited as fully paid.

         1.1.5    No person has the right (whether exercisable now or in the
                  future and whether contingent or not) to call for the
                  allotment, conversion, issue, registration, sale or transfer,
                  amortisation or repayment of any share or loan capital or any
                  other security giving rise to a right over, or an interest in,
                  the capital of any Group Company under any option, agreement
                  or other arrangement (including conversion rights and rights
                  of pre-emption).

         1.1.6    There are no Liens on the shares in any Group Company.

         1.1.7    All consents necessary to effect the transfer of the Shares
                  have been obtained or will be obtained by Closing. For the
                  avoidance of doubt, the receipt of any consents which relate
                  to change of control or other similar provisions in contracts,
                  that are triggered as a result of the transactions
                  contemplated hereby shall not be deemed to be necessary to
                  effect the transfer of the Shares.

         1.1.8    The Shares and the shares in the Subsidiaries have not been
                  and are not listed on any stock exchange or regulated market.

         1.1.9    No Group Company:

                  (i)      has any interest in, or has agreed to acquire, any
                           share capital or other security referred to in
                           paragraph 1.1.5 of any other company (wherever
                           incorporated) other than the Subsidiaries set out in
                           Schedule 1;

                  (ii)     has any branch, division, establishment or operations
                           outside the jurisdiction in which it is incorporated;
                           or

                  (iii)    has or has had in the last three years any associate
                           (being an entity that falls to be treated as such for
                           the purposes of FRS 9).


                                       86



         1.1.10   The particulars contained in Schedule 1 are true, accurate and
                  not misleading in any material respect.

         1.1.11   No Group Company has been involved in any corporate or group
                  restructuring, including by way of merger, demerger or
                  hive-down of material assets, during the last five years and
                  no such restructuring is currently taking place or envisaged.

1.2      Constitutional Documents, Corporate Registers and Minute Books

         1.2.1    The memoranda and articles of association disclosed pursuant
                  to Schedule 1.2 of the Disclosure Letter are true and accurate
                  copies of the memoranda and articles of association of the
                  Group Companies and there have not been and are not any
                  breaches by any Group Company of its memorandum and articles
                  of association which would have a material and adverse effect
                  on the business of the Group.

         1.2.2    The statutory books of whatsoever kind of each Group Company:

                  (i)      are up-to-date;

                  (ii)     are maintained in accordance with applicable law on a
                           proper and consistent basis;

                  (iii)    contain complete and accurate records of all matters
                           required to be dealt with in such books and records;
                           and

                  (iv)     have attached to them copies of all such resolutions
                           and agreements as are required by law to be delivered
                           to the Registrar of Companies and all other
                           resolutions passed by the relevant Group Company or
                           any class of members or shareholders, other than
                           resolutions relating to ordinary business at any
                           Annual General Meeting,

                  in each case in all material respects.

         1.2.3    To the Seller's knowledge, all books and records referred to
                  in paragraph 1.2.2 and all other material documents which are
                  the property of each Group Company or ought to be in its
                  possession are in the possession (or under the control) of the
                  relevant Group Company and no notice or allegation that any of
                  such books and records contain any material inaccuracies has
                  been received.

         1.2.4    All accounts, documents and returns required by Law to be
                  delivered or made to the Registrar of Companies have been duly
                  and correctly delivered or made on a timely basis.

2        Accounts

2.1      Latest Accounts

         Section 2.1 of the Disclosure Letter sets out the audited annual
         consolidated accounts of the Company and the audited annual accounts of
         Crown Castle UK, in each case for the financial year ended on 31
         December 2003, and the March Accounts (together, the "Accounts").
         Except as set out in Section 2.1 of the Disclosure Letter, in the
         footnotes to the Accounts, and except for the omission from the March
         Accounts of footnotes and normal recurring adjustments reflected in
         audited accounts, the Accounts (i) comply with the requirements of the
         Companies Act and other applicable Law, (ii) comply with all current
         statements of standard accounting practice, financial reporting
         standards and


                                       87



         Urgent Issues Task Force Abstracts applicable to a company incorporated
         in England and Wales and have been prepared in accordance with the
         historical cost convention and UK GAAP, on a basis consistent with
         changes in the business of the Group and in all material respects in
         accordance with the same measurement bases, accounting policies and
         estimation techniques as the corresponding accounts for the preceding
         three financial years except where estimation techniques have been
         revised in order to present a more appropriate view of the underlying
         transactions in accordance with UK GAAP and (iii) give a true and fair
         view of each of (A) the state of affairs of the Group as at the
         Accounts Date, in the case of the March Accounts, (B) its profit or
         loss for the three month financial period ended on the Accounts Date,
         in the case of the unaudited consolidated accounts of the Company and
         the unaudited accounts of Crown Castle UK (in each case for the three
         month financial period ended on the Accounts Date), and (C) the state
         of affairs of the Group as at 31 December 2003, and its profit or loss
         for the financial year ended on that date, in the case of the audited
         annual consolidated accounts of the Company and the audited annual
         accounts of Crown Castle UK (in each case for the financial year ended
         on that date).

2.2      Management Accounts

         2.2.1    The Management Accounts have been prepared, in all material
                  respects, in accordance with accounting policies used in
                  preparing the Accounts applied on a consistent basis.

         2.2.2    The Management Accounts are not misleading in any material
                  respect and do not materially misstate the assets and
                  liabilities of the Group as at the Relevant Management
                  Accounts Date nor the profits or losses of the Group for the
                  period concerned.

2.3      Assets under Construction

         To the Seller's knowledge, the Total Construction Cost for any
         individual asset under construction will not materially exceed the
         Projected Cost for that asset.

2.4      Accounting Controls

         The Seller has disclosed, based on its most recent evaluation of
         internal control over the Group's financial reporting, that the Seller
         is not aware of:

         2.4.1    any significant deficiency in the design or operation of
                  internal controls of the Group which could adversely affect in
                  any material respect the Seller's ability to record, process,
                  summarise and report financial data or any material weaknesses
                  in internal controls of the Group; or

         2.4.2    any fraud, whether or not material, that involves management
                  or other employees who have a significant role in the Group's
                  internal controls.

3        Financial Obligations

3.1      Financial Facilities

         Details of all financial facilities (including loans, derivatives and
         hedging arrangements), in each case exceeding (pound)50,000,
         outstanding or available to the Group Companies are given in the
         Disclosure Letter.


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3.2      Guarantees

         There is no material outstanding guarantee, indemnity, pledge,
         suretyship or security (whether or not legally binding) given:

         3.2.1    by any Group Company; or

         3.2.2    for the benefit of any Group Company,

         other than in the case of any indemnities arising in the ordinary
         course of business consistent with past practice and in any other case
         given by a Group Company in respect of the obligations or Liabilities
         of another Group Company.

3.3      Off-Balance Sheet Financing

         No Group Company has outstanding any loan capital, nor has it factored,
         discounted or securitised any of its debts, nor has it engaged in any
         financing of a type which would not be required to be shown or
         reflected in the Accounts.

3.4      Grants and Subsidies

         No Group Company is subject to any arrangement for receipt or repayment
         of any grant, subsidy or financial assistance from any Governmental
         Entity and, to the Seller's knowledge, no Group Company has incurred
         any political expenditure or made any political donation during the
         Relevant Period or is under any binding obligation to do so.

3.5      No Undisclosed Liabilities

         As of the date of this Agreement, no Group Company has any Liabilities
         which would be required by the Companies Act or current statements of
         standard accounting practice, financial reporting standards and Urgent
         Issues Task Force Abstracts applicable to a company incorporated in
         England and Wales to be set out in a consolidated balance sheet of the
         Company or Crown Castle UK that are not disclosed in the Accounts
         (including the notes thereto), except for Liabilities (i) incurred in
         the ordinary course of business consistent with past practice since the
         Accounts Date; (ii) specifically reserved against in the Accounts (and
         only to the extent of such reservation); or (iii) incurred outside the
         ordinary course of business and which are immaterial.

4        Assets

4.1      Real Property

         4.1.1    The Disclosure Letter sets out correct and complete lists of:

                  (i)      real property owned freehold by a Group Company (the
                           "Owned Real Property");

                  (ii)     real property which is owned part freehold and part
                           leasehold by a Group Company (the "Owned Mixed
                           Property");

                  (iii)    real property owned leasehold by a Group Company (the
                           "Leasehold Property") or licenced to and used or held
                           by a Group Company for use in the operation or
                           conduct of the business of a Group Company (the
                           "Leasehold/Licenced Property") including rents and
                           licence fees payable in respect of such
                           Leasehold/Licenced Property as at 18 May 2004;


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                  (iv)     real property licenced by National
                           Transcommunications Limited to a Group Company for
                           use in the operation or conduct of the business of a
                           Group Company (the "NTL Licenced Property"); and

                  (v)      real property managed by a Group Company on behalf of
                           a third party, where a Group Company is entitled to
                           receipt of all or a portion of third party site
                           sharing income derived from such property as part of
                           the business of a Group Company (the "Managed
                           Property"); and such lists identify the individual
                           Owned Real Property, Owned Mixed Property,
                           Leasehold/Licenced Property, NTL Licenced Property
                           and Managed Property by name, grid reference and/or
                           by address or such description as may be commercially
                           reasonable and used by the applicable Group Company
                           to identify its location.

         4.1.2    The Disclosure Letter sets out a list which is correct and
                  complete in all material respects of all leases, subleases and
                  other site sharing agreements entered into by a Group Company
                  as lessor or licensor with a third party as lessee or licencee
                  (such list including details of rents and licence fees
                  payable), other than Ancillary Agreements (collectively, "Site
                  Sharing Agreements") related to or affecting any Owned Real
                  Property, any Owned Mixed Property and any Leasehold/Licenced
                  Property or any interest therein. Except for the Site Sharing
                  Agreements and the Ancillary Agreements, there are no leases,
                  tenancy or site sharing agreements affecting any Owned Real
                  Property and no Group Company has entered into any other
                  leases, tenancy or site sharing agreements other than the
                  relevant Site Sharing Agreements in respect of any Owned Mixed
                  Property and any Leasehold/Licenced Property.

         4.1.3    A Group Company is the legal and beneficial owner of (subject
                  to any Site Sharing Agreements and the Ancillary Agreements)
                  all Owned Real Property, Owned Mixed Property and Leasehold
                  Property, free and clear of all Liens, except for:

                  (i)      Permitted Liens;

                  (ii)     Liens set out in the Disclosure Letter;

                  (iii)    Site Sharing Agreements set out in the Disclosure
                           Letter;

                  (iv)     easements, covenants, notices and restrictions,
                           reservations and rights-of-way which are being
                           substantially complied with in the carrying on of the
                           business of the Group Companies thereat immediately
                           prior to the date of this Agreement;

                  (v)      any condition that would be apparent as part of a
                           physical inspection of any Owned Real Property, Owned
                           Mixed Property or Leasehold/Licenced Property
                           actually made by or on behalf of the Purchaser prior
                           to the Closing;

                  (vi)     town and country planning, building and other similar
                           restrictions;

                  (vii)    restrictions imposed by any Governmental Entity; and

                  (viii)   Liens that have been placed by any vendor, landlord
                           or other third party on property over which a Group
                           Company has easement rights or similar agreements
                           relating thereto.


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         4.1.4    Each Group Company has sufficient rights to occupy and use the
                  Owned Real Property, the Owned Mixed Property or the
                  Leasehold/Licenced Property to enable it to perform its
                  obligations under each of the Site Sharing Agreements.

         4.1.5    The Owned Real Property, the Owned Mixed Property, the
                  Leasehold/Licenced Property and the Managed Property:

                  (i)      comprise all of the properties necessary;

                  (ii)     enjoy sufficient ancillary, access and services
                           rights over other land; and

                  (iii)    are in a sufficient state of repair and condition,

                  to enable each Group Company to carry on its business after
                  the date of this Agreement in the manner carried on
                  immediately prior to the date of this Agreement.

         4.1.6    No material breach of the Planning Acts or of any bye-laws,
                  building regulations or other applicable Law has been
                  committed in relation to any Owned Real Property, Owned Mixed
                  Property or Leasehold/Licenced Property.

         4.1.7    No material development, alterations or other works which
                  would require any permission or consent under the Planning
                  Acts or under any bye-laws, building regulations or other
                  applicable Law have been carried out in relation to any Owned
                  Real Property, Owned Mixed Property or Leasehold/Licenced
                  Property without all those permissions and consents having
                  been obtained and all conditions attached to those permissions
                  and consents have been observed and performed in all material
                  respects.

         4.1.8    Since 24 February 1997, no Group Company has assigned or
                  transferred any Leasehold Property of which it was the
                  original tenant or in respect of which it entered into a
                  covenant with the landlord to observe and perform the tenant's
                  covenants under an applicable lease without receiving a full
                  and legally effective indemnity in respect of its Liability
                  under such lease and to the knowledge of the Seller, no Group
                  Company has had cause to claim on any such indemnity.

         4.1.9    Since 24 February 1997, no Group Company has conveyed or
                  transferred any freehold property in respect of which it
                  entered into any covenant (including an indemnity covenant)
                  which continues to bind it without having received a full and
                  legally effective indemnity in respect of its Liability under
                  such covenant and to the knowledge of the Seller, no Group
                  Company has had cause to claim on any such indemnity.

         This paragraph 4.1 does not relate to Environmental Matters which are
         the subject of paragraph 9 of this Schedule.

4.2      Ownership of Assets

         4.2.1    Each Group Company has legal and beneficial ownership of all
                  material assets reflected in the Accounts or acquired after
                  the Accounts Date, except for those sold or otherwise disposed
                  of since the Accounts Date in the ordinary course of business
                  and not contrary to the provisions of this Agreement, in each
                  case free and clear of all Liens except Permitted Liens and
                  Liens being discharged at Closing as set out in the Disclosure
                  Letter.


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         4.2.2    No Group Company has at any relevant time been party to a
                  transaction pursuant to or as a result of which an asset
                  owned, purportedly owned or otherwise held by any Group
                  Company is liable to be transferred or re-transferred to
                  another person or which gives or may give rise to a right of
                  compensation or other payment in favour of another person.

         This paragraph 4.2 does not relate to Intellectual Property and
         information technology, such items being the subject of paragraph 5 of
         this Schedule.

4.3      Plant and Machinery etc.

         The material items of machinery, broadcasting and transmission
         equipment and plant owned or used by each Group Company (i) are in good
         repair and condition (subject to ordinary wear and tear and having
         regard to their age, location and use); (ii) are in reasonably
         satisfactory working order; (iii) have been adequately serviced and
         maintained and (iv) are not materially surplus to that Group Company's
         requirements.

4.4      Sufficiency of Assets

         The assets owned, leased, licenced or managed to or by the Group are
         sufficient to enable each Group Company to, and no Group Company shall
         be dependent upon the Seller in order to, conduct its business
         immediately following the date of this Agreement in substantially the
         same manner as currently conducted and there are no assets which are
         material to the conduct of the business of the Group as currently
         conducted other than the assets owned, leased, licenced or managed by
         the Group.

5        Intellectual Property and Information Technology

5.1      Information Technology

         All the material records and systems (including computer systems and
         software) and all material data and information of the Group:

         5.1.1    are legally owned or licenced and recorded, stored, maintained
                  or operated or otherwise held exclusively by one or more of
                  the Group Companies and are not wholly or partly dependent in
                  any material respect on any facilities or means (including any
                  electronic, mechanical or photographic process, computerised
                  or otherwise) which are not under the exclusive ownership and
                  control of one or more the Group Companies;

         5.1.2    have not failed or broken down to any extent in the last 12
                  months except as has not had a material and adverse effect on
                  the business of the Group;

         5.1.3    to the Seller's knowledge, have not been subject to any
                  material logical intrusions (e.g. hacking) or physical
                  intrusions in the last 12 months;

         5.1.4    have in place reasonably adequate protection against viruses
                  and harmful program codes in line with good business practice;

         5.1.5    to the extent that they consist of third party software, are
                  being used pursuant to a valid licence agreement;

         5.1.6    are subject to reasonably appropriate disaster recovery
                  arrangements to ensure that the their operation is
                  uninterrupted in any material respect, apart from
                  interruptions for scheduled maintenance;


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         5.1.7    are provided with all reasonably necessary maintenance or
                  support by either a Group Company or by a third party, and in
                  line with good practice in the Group's industry as reasonably
                  necessary to run the business as currently conducted; and

         5.1.8    in relation to operation, functionality and performance, will
                  be unaffected in any material respect by any change in date or
                  by any related change in the field configurations containing
                  date information.

5.2      Intellectual Property

         5.2.1    In relation to Intellectual Property each Group Company has,
                  and in relation to Know-how, to the Seller's knowledge, each
                  Group Company has, the right to use, execute, reproduce,
                  display, perform, modify, enhance, distribute, prepare
                  derivative works of and sublicence, without payment to any
                  other person, the material Intellectual Property owned, used,
                  filed by or licenced by or to the Group or required by the
                  Group for the conduct of its business as substantially
                  presently conducted, and, to the knowledge of the Seller, the
                  consummation of the transactions contemplated by this
                  Agreement will not conflict with, alter or impair any such
                  rights in all material respects.

         5.2.2    No written notice has been received in respect of any, and
                  there are no, actions, claims or proceedings pending or, to
                  the knowledge of the Seller, threatened as of the date of this
                  Agreement against the Seller, or any Group Company by any
                  person with respect to the ownership, validity,
                  enforceability, effectiveness or use of any Intellectual
                  Property or Know-How owned, used, filed by or licenced to a
                  Group Company or alleging that any Group Company is infringing
                  on the Intellectual Property or Know-How of any third party.

         5.2.3    All reasonable details of all the material Intellectual
                  Property or Know-How owned, used, filed by or licenced by or
                  to (including the material terms of such licences) the Group
                  or required by the Group for the conduct of its business as
                  presently conducted have been delivered or made available to
                  the Purchaser.

         5.2.4    To the Seller's knowledge, all material Intellectual Property
                  or Know-How owned or filed by a Group Company is valid and
                  subsisting and nothing has been done or omitted to be done by
                  any Group Company and there has been no act or omission of any
                  third party, which jeopardises the validity or subsistence of
                  any such Intellectual Property or Know-How.

5.3      Data Protection

         5.3.1    To the Seller's knowledge, each Group Company has complied in
                  the last three years in all material respects with all
                  applicable requirements (including notification requirements)
                  of the Data Protection Act 1998.

         5.3.2    No notice alleging non-compliance in any material respect with
                  the Data Protection Act 1998 (including any enforcement
                  notice, deregistration notice or transfer prohibition notice)
                  has been received by any of the Group Companies from the
                  Office of the Information Commissioner.

         5.3.3    No undertaking has been made by any Group Company to the
                  Office of the Information Commissioner.


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         5.3.4    No correspondence, dispute, enquiry or information notice has
                  been made or audit undertaken or, to the Seller's knowledge,
                  been proposed by the Office of the Information Commissioner in
                  relation to any Group Company.

         5.3.5    No Group Company has any outstanding subject access requests
                  or outstanding court orders in respect of the rectification or
                  erasure of personal data.

         5.3.6    No Group Company has been involved in a dispute with an
                  individual in respect of any infringement or alleged
                  infringement of the Data Protection Act 1998 and no Group
                  Company has received a written claim for compensation from any
                  individual in respect of any such infringement or alleged
                  infringement in the previous three years.

6        Contracts

6.1      Capital Commitments

          Since the Accounts Date, the Group has incurred capital commitments in
         the ordinary course of business and in accordance in all material
         respects with the Budget.

6.2      Contracts

         The Disclosure Letter sets out a complete and correct list of each
         contract (together with any contract which amends or modifies any such
         contract in a material respect) as of the date of this Agreement to
         which a Group Company is a party that is:

         6.2.1    an employment agreement which is not terminable at will and
                  which requires the payment of an amount (other than ordinary
                  severance pay) in excess of (pound)100,000 (one hundred
                  thousand pounds Sterling);

         6.2.2    a collective bargaining agreement or other material contract
                  with any Representative Body;

         6.2.3    a contract containing a covenant that following the Closing
                  would by its terms limit in any material respect the freedom
                  of any Group Company to carry on its business as it sees fit
                  or compete in any material respect with the Seller, any
                  Affiliate of the Seller or any third party;

         6.2.4    a contract granting a Lien on the Shares, or the shares or the
                  material assets in any Group Company (other than contracts
                  which are immaterial to the business, subject to Permitted
                  Liens or relate to car leasing arrangements);

         6.2.5    to the extent not set out pursuant to paragraph 6.2.6 below,
                  the master agreements pursuant to which the Company enters or
                  has entered into Site Sharing Agreements;

         6.2.6    a material contract with any Major Customer or Major Supplier;

         6.2.7    a contract relating to any material Indebtedness of a Group
                  Company; or

         6.2.8    a material contract whereunder a Group Company acts as an
                  agent for a third party, or a third party acts as an agent for
                  a Group Company with the authority to bind such Group Company
                  (other than contracts with employees),

         and true and complete copies of the contracts listed in Section 6.2 of
         the Disclosure Letter have been provided or made available to the
         Purchaser for review.


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6.3      Joint Ventures etc.

         No Group Company is, or has agreed in writing to become, to the
         knowledge of the Seller, effectively to become, a member of any joint
         venture, consortium, partnership or other unincorporated association.

6.4      Agreements with Connected Parties

         6.4.1    There is no Indebtedness (actual or contingent) nor any
                  indemnity, guarantee or security arrangement between any Group
                  Company and any current or former employee, current or former
                  director or any current or former consultant of any Group
                  Company or any person connected with any of such persons or in
                  which any such person is interested (whether directly or
                  indirectly) and since the enactment of Sarbanes-Oxley, no
                  Group Company has made any material loans (other than loans
                  which relate to ordinary course employee advances for business
                  purposes including annual travel arrangements) to any
                  executive director of a Group Company.

                 For the purposes of this Clause, "former" shall mean, in
                 relation to any employee, director or consultant, a person who
                 ceased to be employed by a Group Company not more than three
                 years prior to the date of this Agreement.

         6.4.2    Set out in Section 6.4.2 of the Disclosure Letter is a list of
                  all contracts between a Group Company on the one hand, and the
                  Seller or any of its Subsidiaries (other than a Group
                  Company), on the other hand, which shall remain in full force
                  and effect as at Closing.

6.5      Commission and Finder's Fees

         No (i) broker, investment banker, financial advisor or other person
         (including any Relevant Employee or Former Employee), other than J.P.
         Morgan Securities Inc., the fees and expenses of which will be paid by
         the Seller, is entitled to any broker's, finder's, financial advisor's
         or other fee, commission or bonus or similar payment and (ii) no fee,
         commission or bonus or similar payment is payable by any Group Company,
         in each case in connection with this Agreement or the transactions
         contemplated hereby based upon arrangements made by or on behalf of the
         Seller.

6.6      Compliance with Agreements

         6.6.1    Each Contract listed in Section 6.2 of the Disclosure Letter
                  (collectively, the "Material Contracts") is valid, binding and
                  in full force and effect in all material respects and is
                  enforceable in all material respects by a Group Company in
                  accordance with its terms.

         6.6.2    Each Group Company has performed in all material respects the
                  obligations required to be performed by it to date under the
                  Material Contracts, is not in breach or default thereunder
                  and, to the knowledge of the Seller, no other party to any
                  Material Contract is in breach or default in any material
                  respect thereunder.

         6.6.3    No Notice to terminate any Material Contract currently in
                  effect has been served or received by any Group Company.

6.7      Effect of Sale of the Shares

         Neither entering into, nor compliance with, nor completion of this
         Agreement will:


                                       95



         6.7.1    to the Seller's knowledge, cause any Major Customer or Major
                  Supplier to cease to do business with any Group Company on
                  substantially the same terms; or

         6.7.2    result in a material breach of, or give any third party a
                  right to terminate or modify in any material respect, or
                  result in any material Lien under, any Material Contract to
                  which any Group Company is a party.

7        Employees and Employee Benefits

7.1      Definitions

         For the purposes of this paragraph 7:

         "appropriate representatives" has the meaning given in Regulation 10 of
         the Transfer Regulations;

         "employee representatives" means any and all appropriate
         representatives, trade union, association of trade unions, European
         Works Council, works council, staff association, staff council, shop
         steward committee or other organisation or body of employees;

         "Former Employees" means any employee who was employed by any Group
         Company at any time within the Relevant Period but who is not employed
         by any Group Company at the date of this Agreement;

         "Relevant Employees" means those employees of the Group Companies who
         are immediately prior to Closing employed by the Group and whose
         details are set out in the Disclosure Letter;

         "Senior Employee" means any employee employed or engaged by a Group
         Company with an annual base salary, on the basis of full-time
         employment, in excess of (pound)85,000 (eighty five thousand pounds
         Sterling); and

         "Transfer Regulations" means The Transfer of Undertakings (Protection
         of Employment) Regulations 1981 as amended or re-enacted from time to
         time.

7.2      Relevant Employees and Terms of Employment

         7.2.1    Full particulars or, in the case of a document, a copy of the
                  following is set out in the Disclosure Letter:

                  (i)      the total number of Relevant Employees to within 10
                           Relevant Employees;

                  (ii)     a list of the following terms and conditions of the
                           Relevant Employees: notice period; job title; base
                           salary; location; principal benefits (including but
                           not limited to leave and post termination
                           restrictions) and date of continuous employment;

                  (iii)    copies of standard form contracts of employment for
                           each grade of employee, together with standard form
                           documentation such as an employee handbook and a note
                           of any significant differences to the standard forms;

                  (iv)     any arrangement or practice under which any Relevant
                           Employee may receive, or any Former Employee has
                           during the Relevant Period received, any contractual
                           payment;

                  (v)      any arrangement or practice for the payment of
                           redundancy payments;


                                       96



                  (vi)     subject to the Data Protection Act 1998, where any
                           Relevant Employee has been within the Relevant Period
                           continuously absent from work for a period in excess
                           of one month, the reason for the absence where
                           reasonably practicable to do so and the likely future
                           duration of such absence if known but excluding any
                           Relevant Employee on maternity leave;

                  (vii)    the terms of the contract of employment of each
                           Senior Employee;

                  (viii)   any agreement for the secondment to any Group Company
                           of any person;

                  (ix)     any agreement for or relating to the provision of any
                           consultancy service or the service of personnel to
                           any Group Company;

                  (x)      any written employment policy operated in relation to
                           Relevant Employees or any group of them, whether
                           contractual, customary or discretionary;

                  (xi)     any loan or other financial assistance provided to
                           any Relevant Employee which is outstanding;

                  (xii)    the constitution of any Representative Body;

                  (xiii)   any collective agreement, dismissal procedures
                           agreement, union membership agreement, trade dispute
                           or proceedings before any court or tribunal under or
                           by virtue of the provisions of the Trade Union and
                           Labour Relations (Consolidation) Act 1992; and

                  (xiv)    any material outsourcing arrangements with any Group
                           Company to third parties outside of the Group.

         7.2.2    All Relevant Employees at the date of this Agreement are
                  employed by the Group.

         7.2.3    No Relevant Employee will be entitled to any additional
                  compensation, benefits or acceleration of vesting of any
                  benefits or any change to their terms of employment as a
                  result of the transactions contemplated by this Agreement.

         7.2.4    Subject to paragraph 7.2.7 below, there is not any, and during
                  the Relevant Period there has not been any, industrial action
                  in the form of a labour strike, work stoppage or lockout with
                  respect to the Seller or any Group Company.

         7.2.5    Subject to paragraph 7.2.7 below, neither the Seller nor any
                  Group Company is involved in any dispute with any Relevant
                  Employees (or any Representative Body) or Former Employee
                  under or affected by the Employment Relations Act 1999, the
                  Employment Rights Act 1996, the Equal Pay Act 1970, the Sex
                  Discrimination Acts 1975 and 1986, the Race Relations Act
                  1976, the Disability Discrimination Act 1995, Employment
                  Equality (Sexual Orientation) Regulations 2003, Employment
                  Equality (Religion or Beliefs) Regulations 2003 or the Trade
                  Union and Labour Relations (Consolidation) Act 1992.

         7.2.6    Subject to paragraph 7.2.7 below, to the Seller's knowledge,
                  there are not any proceedings in connection with the conduct
                  of the business of the Seller or any Group Company pending
                  before any agency responsible for the prevention of unlawful
                  employment practices.

         7.2.7    The provisions of each of paragraphs 7.2.4 to 7.2.6 above,
                  shall not apply for any such actions, disputes or proceedings
                  which are not reasonably likely to have a material and adverse
                  effect on the business of the Group.


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         7.2.8    There is no contract of employment between any Group Company
                  and any Relevant Employee which cannot be lawfully terminated
                  by six months or less notice (or a payment in lieu of notice
                  for a period not exceeding six months) without giving rise to
                  any claim for damages or compensation except for any statutory
                  claim (other than a breach of contract claim brought in an
                  Employment Tribunal).

         7.2.9    Within the period six months preceding of this Agreement and
                  at the date of this Agreement there have been and/or are no
                  definitive proposals to:

                  (i)      terminate the employment of any Relevant Employee; or

                  (ii)     to vary or amend any term or condition of employment
                           of any Relevant Employee other than in the ordinary
                           course of business.

         7.2.10   There are no amounts owing to any Relevant Employee or Former
                  Employee other than remuneration accrued due (but not payable)
                  since the most recent pay day or business expenses due to be
                  reimbursed.

         7.2.11   The union recognition agreements, collective agreements and
                  European Works Council agreements listed in the Disclosure
                  Letter are all the agreements between the Group Companies and
                  Representative Bodies.

         7.2.12   To the Seller's knowledge, no agreement has been made by any
                  Group Company with any employee representatives in which a
                  Group Company has given any promise or commitment to keep in
                  operation any part of the Group Company's business or keep
                  open any sites where Group Companies are located.

         7.2.13   Within the period of six months preceding the date of this
                  Agreement:

                  (i)      no notice of any redundancies has been given to the
                           relevant Secretary of State with respect to any Group
                           Company;

                  (ii)     no information and consultation exercise has started
                           with a trade union or unions or appropriate
                           representatives by any Group Company under the
                           provisions of Part IV of the Trade Union and Labour
                           Relations (Consolidation) Act 1992 or Regulation 10
                           of the Transfer Regulations in connection with
                           Relevant Employees or Former Employees; and

                  (iii)    no Group Company has been a party to any relevant
                           transfer under the Transfer Regulations.

         7.2.14   There is no claim by or on behalf of any Relevant Employee or
                  Former Employee nor is there any claim by or on behalf of any
                  Relevant Employee or Former Employee pending or, to the
                  Seller's knowledge, threatened, or reasonably capable of
                  arising, in respect of an accident, injury or disease.

         7.2.15   Each Group Company is in compliance in all material respects
                  with all laws relevant to the employment and/or engagement of
                  the Relevant Employees and any consultancy or agency staff
                  except for instances of non-compliance not reasonably likely
                  to have a material and adverse effect on the business of the
                  Group.


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7.3      Liabilities to and for Relevant Employees etc.

         In relation to the employment of the Relevant Employees no material
         Liability (which remains undischarged) has been or, to the Seller's
         knowledge, will be incurred by any Group Company for breach of any
         contract of employment or consultancy agreement.

7.4      Incentive Schemes

         7.4.1    The Seller has provided to the Purchaser copies of the rules
                  and other material documentation relating to all share
                  incentive, share option, profit sharing, bonus or other
                  incentive arrangements for or affecting any Relevant Employee
                  or any former employees of any of the Group Companies,
                  together with full details of all awards and options granted
                  and which remain outstanding.

         7.4.2    No Group Company is or may become liable for any National
                  Insurance contributions arising out of the grant, exercise or
                  release of such awards and options which are not fully
                  provided for in the Accounts.

         7.4.3    In respect of all share incentive, share option, profit
                  sharing, bonus or other incentive arrangements for or
                  affecting any Relevant Employees or any former employees of
                  any of the Group Companies, the Seller and the Group Companies
                  have properly complied with all requirements in relation to
                  PAYE and National Insurance contributions including making
                  such deductions as are required by Law from all payments made
                  or deemed to be or treated as made by them or on their behalf
                  and by duly accounting to the Inland Revenue for all sums so
                  deducted and for all other amounts for which they are required
                  to account under the PAYE and National Insurance contributions
                  systems.

         7.4.4    The Crown Castle International Corp. Savings-Related Share
                  Option Plan was established and remains approved under the
                  Income Tax (Earnings and Pensions) Act 2003 and has been
                  operated at all times in accordance with that legislation.

         7.4.5    There is not in existence nor is it proposed to introduce any
                  share incentive, share option, profit sharing, bonus or other
                  incentive arrangements for or affecting any Relevant Employees
                  or any former employees of any of the Group Companies.

         7.4.6    No Group Company is liable to pay any amount to any employee
                  trust.

7.5      Pensions

         7.5.1    The Seller's Pension Scheme and the GPP are the only
                  arrangements (funded or unfunded) under which a Group Company
                  has or could have any Liability for the purpose of providing
                  benefits on retirement or death and no Group Company otherwise
                  has any obligation (whether written or established by custom
                  or established pursuant to an oral promise) to provide any
                  such benefit or to make any payment for the purpose of
                  providing any such benefit.

         7.5.2    The Seller has supplied to the Purchaser up-to-date
                  documentation relating to the Seller's Pension Scheme and the
                  GPP. Such documentation is accurate in all material respects
                  and is sufficient to provide the Seller with full details of
                  the benefits to be provided under the Seller's Pension Scheme
                  and the GPP and, in the case of the Seller's Pension Scheme,
                  of its funding position as at the date of the most recent
                  actuarial valuation on the bases applicable to that valuation.


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         7.5.3    The Seller's Pension Scheme is approved as an exempt approved
                  scheme (within the meaning of Chapter I of Part XIV of the
                  Taxes Act), and, to the Seller's knowledge, there is no reason
                  why this approval could be withdrawn.

         7.5.4    There is in force in respect of each employment with each
                  Group Company to which the Seller's Pension Scheme relates an
                  appropriate contracting-out certificate. To the Seller's
                  knowledge, there is no reason why any contracting-out
                  certificate could be cancelled, surrendered or varied.

         7.5.5    Each Group Company and the Seller's Pension Scheme comply and
                  have, to the Seller's knowledge, at all times complied in all
                  material respects with all Laws applicable to the Seller's
                  Pension Scheme except to the extent that such laws will be
                  applied retrospectively.

         7.5.6    To the Seller's knowledge, each Group Company has at all time
                  complied in all material respects with its duty to facilitate
                  access to a stakeholder pension scheme (under section 3 of the
                  Welfare Reform and Pensions Act 1999).

         7.5.7    No claim, dispute, complaint or investigation has arisen which
                  relates to the Seller's Pension Scheme or to the provision of
                  retirement or death benefits in respect of the current and
                  former employees of each Group Company, and, to the Seller's
                  knowledge, there is no reason why any material claim, dispute,
                  complaint or investigation could arise.

         7.5.8    All amounts under the Schedule of Contributions in respect of
                  the Seller's Pension Scheme and under the relevant scheme
                  member's contract of employment and under the schedule of
                  payments in respect of the GPP which are required to be paid
                  prior to Closing have been paid.

         7.5.9    The assets of the Seller's Pension Scheme are not subject to
                  any Lien or charge, and do not include any securities issued
                  by, properties leased to or occupied by, or loans made to the
                  Seller or Crown Castle UK or any connected person (for the
                  purposes of Section 40 of the Pensions Act 1995).

         7.5.10   Prior to Closing, no action has been taken by the Seller or
                  the Seller's Pension Scheme which has resulted in or could
                  result in the Seller's Pension Scheme being amended, closed,
                  terminated or wound up in whole or in part.

         7.5.11   All lump sum death in service benefits (with the exception of
                  a refund of contributions) in respect of Relevant Employees
                  are fully insured.

         7.5.12   No payment or repayment of any of the assets of any
                  occupational pension scheme or cancellation of any outstanding
                  payment to an occupational pension scheme has been made to or
                  for the benefit of a Group Company.

         7.5.13   An announcement substantially in the form of the draft
                  announcement disclosed to the Purchaser, pursuant to Section
                  4.10.26(ix) of the Disclosure Letter, has been sent to all
                  members of the Seller's Pension Scheme who were affected by
                  the amendments set out therein.

         7.5.14   The early retirement provisions of the Seller's Pension
                  Scheme, including actuarial reduction factors, were, as at the
                  date on which former members of the BBC Pension Scheme joined
                  the Seller's Pension Scheme, identical to the early retirement
                  provisions which were applicable to such members under the BBC
                  Pension Scheme immediately prior to their ceasing membership
                  of that scheme.


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8        Legal Compliance

8.1      Licences and Consents

         8.1.1    All material licences, consents, authorisations, Orders,
                  warrants, confirmations, permissions, certificates, approvals,
                  registrations and authorities ("Licences") necessary for the
                  carrying on of the businesses of each of the Group Companies
                  as now carried on, and as previously carried on material to
                  the business of the Group (i) have been obtained, (ii) are in
                  full force and effect, (iii) do not contain conditions
                  (including termination conditions) which would hinder the
                  ordinary and usual course of business in any material respect;
                  and (iv) have been and are being complied with in all material
                  respects.

         8.1.2    To the Seller's knowledge, there is no investigation, enquiry
                  or proceeding outstanding or anticipated which is likely to
                  result in the suspension, cancellation, modification or
                  revocation of any Licence.

         8.1.3    None of the Licences has been breached and to the Seller's
                  knowledge the Seller has not received notification that any
                  Licence will be suspended, modified, revoked or not renewed
                  (whether as a result of the entry into or completion of this
                  Agreement or otherwise).

8.2      Compliance with Laws

         8.2.1    Each Group Company is in compliance with all Laws (including
                  anti-trust laws, fair trading, state aid, consumer protection
                  or similar legislation) and Orders applicable thereto, except
                  for instances of non-compliance that are not reasonably likely
                  to have a material and adverse effect on the business of the
                  Group.

         8.2.2    Neither the Seller nor any Group Company has received any
                  written notice during the Relevant Period from a Governmental
                  Entity that alleges that a Group Company is not in compliance
                  in any material respect with any Laws or Orders applicable
                  thereto.

         8.2.3    Neither the Seller nor, any Group Company has received any
                  written notice during the Relevant Period that any
                  investigation or review by any Governmental Entity with
                  respect to any Group Company is pending or contemplated.

         8.2.4    Since 1 January 1999, the Seller has not received notice from
                  the SEC or any other governmental entity that any of its
                  accounting policies or practices relating to or having an
                  impact on the Group are the subject of any review, inquiry,
                  investigation or challenge other than comments from the SEC on
                  the Seller's filings which comments have either been satisfied
                  or withdrawn by the SEC.

         8.2.5    This paragraph 8.2 does not relate to matters with respect to
                  Taxes, which are subject to paragraph 12 of this Schedule,
                  employee related matters, which are subject to paragraphs 7.2
                  and 7.3 of this Schedule, Environmental Matters, which are
                  subject to paragraph 9 of this Schedule and intellectual
                  property matters which are subject to paragraph 5 of this
                  Schedule.

8.3      No Questionable Payments

         To the Seller's knowledge, none of the directors, officers, agents,
         employees or other persons acting on behalf of any Group Company has
         been party to the use of any of the assets of the Group Companies for
         unlawful contributions, gifts, entertainment or other


                                       101



         unlawful expenses relating to political activity or to the making of
         any direct or indirect unlawful payment to government officials or
         employees from such assets; to the establishment or maintenance of any
         unlawful or unrecorded fund of monies or other assets; to the making of
         any fraudulent entries in the books or records of any Group Company; or
         to the making of any unlawful or material undisclosed payment.

9        Environment

9.1      The Group Companies:

         9.1.1    are in material compliance with and, to the Seller's
                  knowledge, have at all times prior to the date of this
                  Agreement complied with all Environmental Laws in all material
                  respects;

         9.1.2    hold and comply in all material respects with and have
                  obtained and, to the Seller's knowledge, at all times prior to
                  the date of this Agreement complied in all material respects
                  with all Environmental Licences.

9.2      To the Seller's knowledge, there are no circumstances which are
         reasonably likely to give rise to any suspension, revocation or
         material modification of any material Environmental Licence, or which
         may prejudice the renewal, extension or, where necessary, transfer of,
         any such Environmental Licence.

9.3      There is no ongoing civil, criminal, regulatory or administrative
         action, claim, investigation or other proceeding or suit against or
         involving any Group Company relating to Environmental Law or
         Environmental Licences or Industry Guidelines, nor have any such
         proceedings, investigations or suits taken place or been settled and,
         to the Seller's knowledge, there are no such proceedings,
         investigations or suits pending or threatened nor to the Seller's
         knowledge are there any circumstances which are reasonably likely to
         give rise to a material investigation, proceeding or suit.

9.4      To the Seller's knowledge, no material work, measures or expenditure is
         required in the next 12 months in connection with the business of any
         Group Company in order to secure compliance with or maintain any
         existing Environmental Licences or to comply with Environmental Laws.

9.5      Material details of all environmental, health and safety and Asbestos
         assessments, audits, reviews or investigations, whether in draft (where
         no final form report has been produced) or final form in the possession
         of the Seller or any Group Company, concerning the current or previous
         operations of any Group Company and/or the Environment at any Property
         have been made available to the Purchaser.

9.6      To the Seller's knowledge, no Hazardous Substance is present on or has
         been disposed of, stored, generated, released or buried at, on, from or
         under any Property, so as to give rise to a material Liability on the
         part of any Group Company, nor has any Group Company or any other
         person or entity for which any Group Company can be liable to any
         material extent, disposed of, stored, generated, released or buried any
         Hazardous Substance or knowingly permitted such disposal, storage,
         generation, release or burial at, on, from or under any other place, in
         circumstances which are reasonably likely to give rise to a material
         Liability of any Group Company under Environmental Law.

9.7      To the Seller's knowledge, no Radiation is present on or has been
         generated or released, from any Relevant Equipment that will give rise
         to a material Liability on the part of any


                                       102



         Group Company, nor has any Group Company or any other person or entity
         for which any Group Company will be liable to any material extent
         generated or released any Radiation or knowingly permitted such
         generation or release from any other Relevant Equipment in
         circumstances which will give rise to a Material Liability of any Group
         Company under Environmental Law or Industry Guidelines.

10       Litigation

10.1     Current Proceedings

         No Group Company (or any person for whose acts or defaults a Group
         Company may be vicariously liable) is involved whether as claimant or
         defendant or other party in any claim, legal action, proceeding, suit,
         litigation, prosecution, investigation, enquiry, mediation or
         arbitration (other than as claimant in the collection of debts arising
         in the ordinary and usual course of its business and immaterial town
         and country planning, building and other similar proceedings) (each a
         "Claim").

10.2     Pending or Threatened Proceedings

         To the Seller's knowledge, no Claim is pending or threatened by or
         against any Group Company (or any person for whose acts or defaults a
         Group Company may be vicariously liable).

10.3     Circumstances likely to lead to claims

         To the Seller's knowledge, there are no investigations, disciplinary
         proceedings or other circumstances likely to lead to any Claim
         (excluding Claims relating to Environmental Law or Environmental
         Licences) which, if adversely determined, is likely to have a material
         adverse effect on the business of the Group.

10.4     No Court Orders etc

         Neither the Seller nor any Group Company, nor any of the material
         properties, assets or operations which it owns or in which it is
         interested, is subject to any continuing injunction, judgment or order
         of any Court, arbitrator, governmental agency or regulatory body, nor
         in default under any order, licence, regulation or demand of any
         governmental agency or regulatory body or with respect to any order,
         suit, injunction or decree of any Court that is likely to have a
         material and adverse effect on the Group.

11       Insurance

11.1     Particulars of Insurances

         11.1.1   To the Seller's knowledge, all the material assets of each of
                  the Group Companies which are capable of being insured have at
                  all material times been and are insured consistent with normal
                  industry practice under an "all risks" policy on the basis of
                  "replacement cost valuation" subject to the customary terms,
                  conditions and exceptions of such policies.

         11.1.2   To the Seller's knowledge, each Group Company has at all
                  material times complied in all material respects with the
                  statutory insurance requirements of the country of exposure.


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         11.1.3   To the Seller's knowledge, each Group Company has at all
                  material times been and is reasonably covered against
                  accident, physical loss or damage, third party liability
                  (including product liability), environmental liability (to the
                  extent that insurance is reasonably available), and other
                  risks normally covered by insurance by such companies.

11.2     Details of Policies

         In respect of the insurances referred to in paragraph 11.1:

         11.2.1   all premiums and any related insurance premium taxes have been
                  duly paid to date;

         11.2.2   all the policies are in full force and effect;

         11.2.3   to the Seller's knowledge, no circumstances have arisen which
                  would render any of the policies void or unenforceable for
                  illegality or otherwise;

         11.2.4   to the Seller's knowledge, there has been no breach of the
                  terms, conditions and warranties of any of the policies that
                  would entitle insurers to decline to pay all or any part of
                  any claim made under the policies or to terminate any policy;
                  and

         11.2.5   to the Seller's knowledge, neither the entering into, nor
                  compliance with nor completion of this Agreement will, or is
                  likely to, give an insurer the right to terminate, modify in
                  any material respect or lapse any insurance policy.

11.3     Insurance Claims

         11.3.1   Details of all insurance claims made during the past three
                  years are contained in the Disclosure Letter.

         11.3.2   No material insurance claim is outstanding and, to the
                  Seller's knowledge, no circumstances exist which are likely to
                  give rise to any material insurance claim.

         11.3.3   To the Seller's knowledge, there has been no failure in the
                  past three years to notify the Group's insurers of any
                  circumstances which would have given rise to a material
                  insurance claim or any failure to notify which has resulted in
                  the Group's insurer not accepting any material insurance
                  claim.

11.4     Claims Refused

         Since 9 May 1996 no claim has been refused or settled below the amount
         claimed.

12       Tax

         Definitions:

         For the purposes of this paragraph 12:

         "Clawback Provision" means Finance Act 2002 Section 111; Finance Act
         2002 Section 113; Finance Act 2002 Schedule 35 paragraph 3; Schedule 35
         paragraph 4; Finance Act 2003 Schedule 7 paragraph 3; Finance Act 2003
         Schedule 7 paragraph 4(7); Finance Act 2003 Schedule 7 paragraph 9; and
         Finance Act 2003 Schedule 7 paragraph 11; and

         "Secondary Recovery Provision" means Finance Act 2002 Schedule 34
         paragraph 8; Finance Act 2002 Schedule 35 paragraph 9; Finance Act 2003
         Schedule 7 paragraph 5; and Finance Act 2003 Schedule 7 paragraph 12.


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12.1     Each Group Company has timely filed (within any applicable extension
         periods) with the appropriate Tax Authorities all Tax Returns required
         to be filed (including any Tax Return which any Tax Authority may
         require a Group Company to file) on or prior to the date of this
         Agreement, such Tax Returns are true, accurate and complete in all
         material respects, are not likely to become the subject of any material
         dispute with any Tax Authority and all Taxes shown as due from such
         Group Company on any such Tax Returns have been paid and all
         Liabilities for Taxes of any Group Company have been discharged to the
         extent that payment of such Taxes fell due on or prior to the date of
         Closing. Copies of all corporation tax returns for each Group Company
         for the last three years have been delivered or made available to the
         Purchaser.

12.2     No Tax Authority has raised in writing any material disputes or claims
         concerning any Liability for Taxes relating solely to the assets or
         business of any Group Company and, there is no audit or investigation
         pending or, to the Seller's knowledge, threatened, in respect of any
         Liability for Taxes of any Group Company.

12.3     If Closing shall occur on or prior to 31 August 2004 and Closing were
         the end of an accounting period (within the meaning of section 12 of
         the Taxes Act) for each Group Company, as of 31 December 2003 the Tax
         Written Down Value of the assets of any Group Company which constitute
         Plant and Machinery which are not Long Life Assets was not less than
         (pound)234,000,000 (two hundred and thirty four million pounds
         Sterling).

12.4     If Closing shall occur on or prior to 30 September 2004 and Closing
         were the end of an accounting period (within the meaning of section 12
         of the Taxes Act) for each Group Company, as of 31 December 2003 the
         Tax Written Down Value of the assets of any Group Company which
         constitute Plant and Machinery which are not Long Life Assets was not
         less than (pound)231,500,000 (two hundred and thirty one million, five
         hundred thousand pounds Sterling).

12.5     Set out in Section 12.5 of the Disclosure Letter is the Seller's
         reasonable estimation at the date of this Agreement of the Tax Written
         Down Value as of a hypothetical tax year-end of 31 August 2004, setting
         out the calculations related thereto. The Seller makes no warranty with
         respect to the accuracy of such estimate or such calculations, which
         are being furnished solely for informational purposes, as actual
         results may vary substantially.

12.6     No Group Company has made a claim for relief from stamp duty or stamp
         duty land tax which may be withdrawn pursuant to a Clawback Provision,
         including without limitation, the application of any Clawback Provision
         as a result of the execution of this Agreement, and no Group Company is
         liable for stamp duty or stamp duty land tax of another company
         pursuant to a Secondary Recovery Provision.

12.7     Each payment made pursuant to the Corporation Tax (Instalment Payments)
         Regulations 1985, as well as the provision made in respect of such
         payments in the Working Capital Statement, is a reasonable estimate of
         the aggregate tax liability for the Pre-Closing periods of each Group
         Company.

12.8     There are no outstanding written agreements or waivers extending the
         statutory period of limitations or extending any concession that is not
         a concession of general application to United Kingdom companies
         applicable to any Group Company for any Pre-Closing Tax Period.

12.9     All Liabilities of the Group Companies for Taxes measured by reference
         to income, profits or chargeable gains earned, accrued, or deemed
         earned or accrued, or received on or


                                       105



         before the Accounts Date, or arising in respect of an Event occurring
         on or before that date, are fully provided for or reserved against in
         the Accounts.

12.10    Each Group Company has complied with its obligations to pay Taxes in
         respect of, and report the payment of, employment income or employment
         benefits, including any employee securities or options, relating to all
         Relevant Employees and Former Employees and officers of such company
         and, where required, has complied with its obligation to withhold such
         Taxes from such person or has otherwise ensured that such person has
         made good to the relevant Group Company the amount of such Taxes within
         the statutory time limit.

12.11    The Disclosure Letter fully discloses all claims, elections,
         disclaimers, withdrawals of claims or notifications that have not been
         made as of the date of this Agreement but that are assumed to have been
         made for purposes of the provisions or reserves for Taxes included in
         the Accounts.

12.12    No Group Company has entered into any transaction or incurred any
         liability the consideration for which was or will be otherwise than on
         an arm's-length basis, nor has it agreed to do so, where the relevant
         Tax Authority could reasonably be expected to adjust that company's
         income, profits or capital gains for Tax purposes. Each Group Company
         has kept full and accurate documentation recording the methodology used
         to determine such consideration.

12.13    No Group Company has acquired any asset that will be deemed under
         applicable Tax legislation to be disposed of and reacquired by a Group
         Company as a result of this Agreement and no Liability for Taxes of a
         Group Company will otherwise arise as a result of the entry into and
         performance of this Agreement.

12.14    No transaction or event has occurred that would cause a Group Company
         to be liable for any Taxes for which another person (other than a Group
         Company) is primarily liable, including as a result of such other
         person being or having been a member of the same group of companies.

12.15    All documents in the possession of any Group Company or in the
         enforcement of which any Group Company may be interested (or, to the
         extent that any such documents have been executed and retained outside
         the United Kingdom, they would not attract United Kingdom stamp duty if
         brought into the United Kingdom) and that attract stamp duty or
         transfer duty in the United Kingdom or elsewhere have been duly stamped
         in respect of UK stamp duty and any other transfer or documentary tax
         of a similar nature and all such duty and tax wheresoever imposed or
         payable, and any interest and penalties have been paid.

12.16    Each Group Company is and has at all times been resident for Tax
         purposes in the jurisdiction in which it was incorporated, and each
         such company is not and has never been treated as a resident or liable
         to Tax in any other jurisdiction for Tax purposes, including pursuant
         to any double taxation agreement. Each Group Company has kept proper
         and adequate records to enable it to calculate and support such
         calculations of its liability for Taxes and to comply with Tax law,
         where such Liability or such requirement relates to the last six
         accounting periods.

12.17    Each Group Company has fully complied with any relevant value added tax
         Law.

12.18    Each Group Company has complied with all rules and regulations relating
         to the withholding of Taxes.








                                       106



12.19    No Group Company has, in the six years preceding the date of this
         Agreement, been the subject of a PAYE audit in which non-compliance
         with share plan PAYE Liability and/or National Insurance contributions
         Liability was identified as an issue by the Inland Revenue.

13       Important Business Issues Since the Accounts Date

         Since the Accounts Date as regards each Group Company:

13.1     there has been no material adverse change in the financial or trading
         position and no event, fact or matter has occurred which will or is
         likely to give rise to any such change;

13.2     there has been no disposal of, or agreement to dispose of, any material
         fixed assets;

13.3     the business has been carried on in the ordinary and usual course, in
         all material respects;

13.4     except as set out in the Budget, no material capital commitments have
         been entered into or proposed by any Group Company. For these purposes
         a material capital commitment is one involving capital expenditure of
         over, or consideration equal to, (pound)3,000,000 (three million pounds
         Sterling) exclusive of VAT;

13.5     the business has not been materially and adversely affected by the loss
         of any Major Customer or Major Supplier and to the Seller's knowledge,
         no notification has been received from any Major Customer or Major
         Supplier that it intends to terminate such contract;

13.6     no Group Company has declared, made or paid any dividend or other
         distribution to its members;

13.7     no Group Company has issued or allotted or agreed to issue or allot any
         share capital or any other security giving rise to a right over its
         capital;

13.8     no Group Company has redeemed or purchased or agreed to redeem or
         purchase any of its share capital; and

13.9     no Group Company has changed the application of its accounting policies
         which is material to the Accounts and Management Accounts taken as a
         whole.

14       Disclosure of Information

         To the Seller's knowledge, each document specified in the Disclosure
         Letter as being attached thereto as an agreed disclosure is a true and
         complete copy of such document.

15       Authority and Capacity

15.1     Each of the Seller and each of the Group Companies is validly existing
         and is a company duly incorporated under the law of its jurisdiction of
         incorporation.

15.2     The Seller has the legal right and full power and authority to enter
         into and perform this Agreement and any other documents to be executed
         by it pursuant to or in connection with this Agreement.

15.3     This Agreement will, when executed, constitute valid and binding
         obligations on the Seller, in accordance with its terms.








                                       107



15.4     The Seller has taken all corporate action required by it to authorise
         it to enter into and to perform this Agreement, and any other documents
         to be executed by it pursuant to or in connection with this Agreement.

16       Insolvency etc.

16.1     No Group Company is insolvent or unable, whether as defined by Section
         123 of the Insolvency Act 1986 or otherwise, to pay its debts,
         including its future and prospective debts.

16.2     No Group Company has proposed or intends to propose any arrangement of
         any type with its creditors or any group of creditors whether by court
         process or otherwise under which such creditors shall receive or be
         paid less than the amounts contractually or otherwise due to them.

16.3     No Group Company nor any creditor of any Group Company has presented
         any petition, application or other proceedings for any administration
         order, creditors' voluntary arrangement or similar relief by which the
         affairs, business or assets of any Group Company concerned are managed
         by a person appointed for the purpose by a court, governmental agency
         or similar body, or by any creditor or by such company itself nor has
         any such Order or relief been granted or appointment made.

16.4     No Order has been made, petition or application presented, resolution
         passed or meeting convened for the purpose of winding-up any Group
         Company or whereby the assets of any Group Company are to be
         distributed to creditors or shareholders or other contributories of any
         Group Company.

16.5     No receiver (including an administrative receiver), liquidator,
         trustee, administrator, supervisor, nominee, custodian or similar
         official has been appointed in respect of the whole or any part of the
         business or assets of any Group Company nor has any step been taken for
         or with a view to the appointment of such a person nor has any event
         taken place or is likely to take place as a consequence of which such
         an appointment might be made.

16.6     No creditor of any Group Company has taken, or is entitled to take any
         steps to enforce, or has enforced any security over any assets of any
         Group Company or is, to the Seller's knowledge, likely to do so in the
         immediate future.

16.7     No Group Company is in default of any of its obligations in relation to
         any of the financial facilities referred to in paragraph 3.1 of this
         Schedule.

17       Broadcasting

17.1     Licences

         17.1.1   In relation to licences issued under the Broadcasting Acts and
                  Wireless Telegraphy Acts to the Group, or used (as agent or
                  otherwise) by the Group, the Group:

                  (i)      has disclosed these licences in Schedule 17.1.1 of
                           the Disclosure Letter;

                  (ii)     has complied in all material respects with all
                           material terms of these licences;

                  (iii)    has promptly met all material deadlines under these
                           licences (including, but not limited to, all payment
                           obligations, disclosure obligations and notification
                           obligations);


                                       108



                  (iv)     to the Seller's knowledge, has not received
                           notification that any such licence will be revoked or
                           not renewed; and

                  (v)      is not presently obliged and, to the Seller's
                           knowledge, will not be obliged, to commit material or
                           significant capital expenditure now or in the next 12
                           months in order to comply with the terms of the
                           licences as of the date of this Agreement.

17.2     Material Transmission customers contracts

         In relation to each of the BBC Analogue Transmission Agreement, the BBC
         Mux 1 DDT Transmission Agreement and the BBC Mux B DTT Transmission
         Agreement, the Company has not commenced discussions regarding renewal
         of the agreement nor has it been notified that the BBC does not propose
         to renew the agreement.


                                       109



                                   Schedule 6
                        Warranties given by the Purchaser

1        Authority and Capacity

1.1      The Purchaser is validly existing and is a company duly incorporated
         under the Law of its jurisdiction of incorporation.

1.2      The Purchaser has the legal right and full power and authority to enter
         into and perform this Agreement and any other documents to be executed
         by it pursuant to or in connection with this Agreement.

1.3      This Agreement will, when executed, constitute valid and binding
         obligations on the Purchaser, in accordance with its terms.

1.4      The Purchaser has taken all corporate action required by it to
         authorise it to enter into and to perform this Agreement, and any other
         documents to be executed by it pursuant to or in connection with this
         Agreement.

2        Insolvency etc.

2.1      The Purchaser is not insolvent or unable, whether as defined by Section
         123 of the Insolvency Act 1986 or otherwise, to pay its debts,
         including its future and prospective debts.

2.2      The Purchaser has not proposed and does not intend to propose any
         arrangement of any type with its creditors or any group of creditors
         whether by court process or otherwise under which such creditors shall
         receive or be paid less than the amounts contractually or otherwise due
         to them.

2.3      Neither the Purchaser nor any creditor of the Purchaser has presented
         any petition, application or other proceedings for any administration
         Order, creditors' voluntary arrangement or similar relief by which the
         affairs, business or assets of the Purchaser are managed by a person
         appointed for the purpose by a court, governmental agency or similar
         body, or by any creditor or by the Purchaser itself nor has any such
         order or relief been granted or appointment made.

2.4      No Order has been made, petition or application presented, resolution
         passed or meeting convened for the purpose of winding-up the Purchaser
         or whereby the assets of the Purchaser are to be distributed to
         creditors or shareholders or other contributories of the Purchaser.

2.5      No receiver (including an administrative receiver), liquidator,
         trustee, administrator, supervisor, nominee, custodian or similar
         official has been appointed in respect of the whole or any part of the
         business or assets of the Purchaser nor has any step been taken for or
         with a view to the appointment of such a person nor has any event taken
         place or is likely to take place as a consequence of which such an
         appointment might be made.

3        No Violation; Consents and Approvals

3.1      The execution and delivery by the Purchaser of this Agreement does not,
         and the consummation of the transactions contemplated hereby and
         compliance with the terms hereof will not:


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         3.1.1    conflict with or result in any violation of any provision of
                  the organisational documents of Purchaser;

         3.1.2    conflict with, result in a violation or breach of, or
                  constitute a default, or give rise to any right of
                  termination, revocation, cancellation or acceleration, under
                  any note, bond, mortgage, indenture, deed of trust, licence,
                  lease, contract, commitment or agreement to which the
                  Purchaser is a party, except for any such conflict, violation,
                  breach, default or right which is not reasonably likely to
                  have a material adverse effect on the ability of the Purchaser
                  to perform its obligations under this Agreement; or

         3.1.3    conflict with or result in a violation of any Law or Order
                  applicable to the Purchaser or to the property or assets of
                  the Purchaser, except for any such conflict or violation which
                  is not reasonably likely to have a material adverse effect on
                  the ability of the Purchaser to perform its obligations under
                  this Agreement.

3.2      No consent, approval, licence, permit, Order or authorisation of,
         registration, declaration or filing with, or notice to, any
         Governmental Entity or any other person is required to be obtained or
         made by or with respect to Purchaser in connection with the execution
         and delivery of this Agreement, the performance of its obligations
         hereunder or the consummation of the transactions contemplated hereby,
         other than such consents, approvals, licences, permits, Orders,
         authorisations, registrations, declarations or filings the failure of
         which to be obtained or made are not reasonably likely to have a
         material adverse effect on the ability of the Purchaser to perform its
         obligations under this Agreement.

4        No Additional Warranties

         The Purchaser acknowledges that it and its Representatives have had the
         opportunity to conduct, and have conducted, due diligence
         investigations in relation to the Group before the date of this
         Agreement through access to a data room, which investigations, for the
         avoidance of doubt, shall not affect the provisions of Clause 8.2. The
         Purchaser further acknowledges that none of the Seller, any Subsidiary,
         any of the Seller's Representatives nor any other person has made any
         representation or warranty, expressed or implied, as to the accuracy or
         completeness of any information regarding the Group Companies furnished
         or made available to the Purchaser and its Representatives, except as
         expressly set out in this Agreement, and except as expressly set out in
         this Agreement, none of the Seller, any Subsidiary, any of the Seller's
         Representatives nor any other person shall have or be subject to any
         Liability to the Purchaser or any other person resulting from the
         distribution to the Purchaser or any of its Representatives, or the
         Purchaser's or any such Representative's use of, any such information,
         including any Books and Records or any other information, documents or
         management presentations or in any other form in expectation of the
         transactions contemplated by this Agreement.

5        Tax Warranty

         The Purchaser does not intend to permit the corporation tax Liabilities
         of any Group Company, to the extent provided for in the Accounts and to
         the extent payable by any company to remain undischarged. The Purchaser
         is not entering into this Agreement on the assumption referred to in
         Section 767AA(2) of the Taxes Act.


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6        Financial Warranty

         The Purchaser warrants that it has, or will have, as at Closing
         sufficient readily available funds for the payment in full of the
         Closing Amount.


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                                   Schedule 7

                        Warranties given by the Guarantor

1        Authority and Capacity

1.1      The Guarantor is validly existing and is a company duly incorporated
         under the Law of its jurisdiction of incorporation.

1.2      The Guarantor has the legal right and full power and authority to enter
         into and perform this Agreement and any other documents to be executed
         by it pursuant to or in connection with this Agreement.

1.3      This Agreement will, when executed, constitute valid and binding
         obligations on the Guarantor, in accordance with its terms.

1.4      The Guarantor has taken all corporate action required by it to
         authorise it to enter into and to perform this Agreement, and any other
         documents to be executed by it pursuant to or in connection with this
         Agreement.

2        Insolvency etc.

2.1      The Guarantor is not insolvent or unable, whether as defined by Section
         123 of the Insolvency Act 1986 or otherwise, to pay its debts,
         including its future and prospective debts.

2.2      The Guarantor has not proposed and does not intend to propose any
         arrangement of any type with its creditors or any group of creditors
         whether by court process or otherwise under which such creditors shall
         receive or be paid less than the amounts contractually or otherwise due
         to them.

2.3      Neither the Guarantor nor any creditor of the Guarantor has presented
         any petition, application or other proceedings for any administration
         Order, creditors' voluntary arrangement or similar relief by which the
         affairs, business or assets of the Guarantor are managed by a person
         appointed for the purpose by a court, governmental agency or similar
         body, or by any creditor or by the Guarantor itself nor has any such
         order or relief been granted or appointment made.

2.4      No Order has been made, petition or application presented, resolution
         passed or meeting convened for the purpose of winding-up the Guarantor
         or whereby the assets of the Guarantor are to be distributed to
         creditors or shareholders or other contributories of the Guarantor.

2.5      No receiver (including an administrative receiver), liquidator,
         trustee, administrator, supervisor, nominee, custodian or similar
         official has been appointed in respect of the whole or any part of the
         business or assets of the Guarantor nor has any step been taken for or
         with a view to the appointment of such a person nor has any event taken
         place or is likely to take place as a consequence of which such an
         appointment might be made.


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                                   Schedule 8
                               Seller's Knowledge



Name                                        Title
                                         
John P. Kelly                               President/CEO, Crown Castle International Corp.
W. Benjamin Moreland                        SVP/CFO/Treasurer, Crown Castle International Corp.
E. Blake Hawk                               General Counsel, Crown Castle International Corp.
Jay Brown                                   Vice President, Finance, Crown Castle International Corp.
Peter G. Abery                              President and Managing Director, Crown Castle UK Limited
Angela M. Dennehy                           Director, Legal Services and Company Secretary, Crown Castle UK Limited
Graham Greener                              Director, Site Operations, Crown Castle UK Limited
Ben Quinn                                   Director, Asset Management, Crown Castle UK Limited
Andrew Sloey                                Director, Finance, Crown Castle UK Limited
John J. Ward                                Director, Network Operations and Engineering, Crown Castle UK Limited
Dr. Shirin Tahzib                           Vice President, Information Systems and Services, Crown Castle UK Limited
Rita Dora                                   Director, Human Capital, Crown Castle UK Limited



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                                   Schedule 9
                         Transitional Services Agreement


The following is a summary of the terms for the Transitional Services
Agreement-Mobile Media.

The agreement shall provide that the Group Company shall make available to the
Seller's Group the individuals listed below for the services described below.

Individuals:                  Nick Davies
                              Russel Inman
                              Keith Hayler
                              John Village
                              Phil Osburne
                              Paul Segar (currently a consultant)
                              Chas Murray (currently a consultant)

Term: Twenty four (24) months following Closing.

Compensation: The internal rate card quoted by the Group Company plus
substantiated direct third party expenses consistent with practices at the
Closing Date. The compensation and reimbursement shall be billed monthly and
such amount is due within thirty (30) days of the invoice date.

Services: Consultation and technical services involving and relating to RF
transmission in the United States including radio planning for mobile media and
involving 1670-1675 Mhz spectrum and DVB-H deployment and transmission.

Scheduling: Seller's Group shall provide the Group Company with a schedule of
its requirements for the services on a monthly basis at least two months in
advance and the Group Company shall use best efforts to provide full and timely
access to indicated individuals in accordance with such schedule.

IP: Any intellectual property developed or discovered by an individual while
providing services to the Seller's Group while the individual is an employee or
consultant to the Group Company shall be the intellectual property for both the
Seller's Group and the Group Company.

Confidentiality: The parties shall be subject to commercially reasonable
confidentiality arrangements as to confidential and proprietary information.

Miscellaneous: The Group Company is not to be obliged to retain any of the named
individuals as an employee or consultant and any non-solicitation provision is
not to be applicable to the named individuals. The parties shall retain
reasonable commercial insurance as to the services to be provided by the named
individuals.


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