ACE Limited














                                Rules of the
                     Approved UK Stock Option Programme













             Approved by the Inland Revenue on 24 November 1997
                         (Reference No: X19095/RC)














                            Lovell White Durrant
                             65 Holborn Viaduct
                              London EC1A 2DY
                             Ref: A4/JCMcM/LLW










                                  CONTENTS






Clause
                                                                                Page No.
                                                                           

1.       Establishment and purpose of the Programme                              1

2.       Definitions                                                             1

3.       Grant of Options                                                        5

4.       Limitations on Grant of Options                                         5

5.       Exercise of Options                                                     6

6.       Time for Exercise of Options                                            6

7.       Replacement of Options on a takeover or other change in Control of
           the Company                                                           7

8.       Variations in the Share Capital of the Company                          8

9.       Administration of the Programme                                         8

10.      Amendment of the Programme                                              8

11.      Additional Provisions                                                   8

12.      Termination                                                             9









                                                     - 1 -




                               ACE Limited
                   Approved UK Stock Incentive Programme
                   (An approved Company share option plan
                  pursuant to the provisions of Schedule 9
               to the Income and Corporation Taxes Act 1988)


1.       Establishment and Purpose of the Programme

1.1      On 12 November 1997 the Committee adopted, subject to the approval
         of the Inland Revenue, the Programme as an addendum to the ACE
         Limited 1995 Long-Term Incentive Plan (the "Plan") to enable
         Eligible Employees of the Company and its Subsidiaries to
         participate in the Plan and obtain the benefit of approval by the
         Board of Inland Revenue pursuant to Schedule 9 to the Income and
         Corporation Taxes Act 1988 ("Schedule 9").

1.2      On 24 November 1997 the Inland Revenue gave formal approval to the
         Programme. The rules of the Programme (the "Programme Rules")
         comply with the requirements of Schedule 9.

1.3      The rules of the Plan (the "Plan Rules") shall apply to the
         Programme unless the Programme Rules expressly or by implication
         provide to the contrary, but so that nothing in either the Plan or
         the Programme Rules shall operate to prejudice the approval by the
         Board of Inland Revenue of the Programme PROVIDED ALWAYS THAT in
         the event of a conflict between the Plan Rules and the Programme
         Rules whereby the status of the Plan is or will be prejudiced the
         Plan Rules shall prevail.

1.4      For the avoidance of doubt rule 2.5 of the Plan shall not apply to
         the Programme and the Company may only grant options pursuant the
         Programme. Stock Appreciation Rights, Limited Stock Appreciation
         Rights, Restricted Stock or a Stock Purchase Program may not be
         granted pursuant the Programme Rules.

1.5      The Committee may designate whether or not an Option is to be
         considered an incentive stock option as defined in Section 422(b)
         of the US Internal Code 1986, as amended ("Incentive Stock
         Option").

1.6      The Programme shall be governed and construed in accordance with the
         laws of England.

2.       Definitions

2.1      In the Programme the following words and expressions have the meanings
         set opposite them:


         "ACE Group"                      the Company and all of the
                                          Subsidiaries and, in relation to
                                          a New Option granted pursuant to
                                          clause 7 the Acquiring Company
                                          and the Controlling Company and
                                          their Subsidiaries as defined in
                                          Section 736 of the Companies Act
                                          1985, and "member of the ACE
                                          Group" shall be construed
                                          accordingly;

         "Act"                            the Securities Exchange Act 1934, 
                                          as amended;






                                                     - 2 -

         "Acquiring                       a company which for the purposes of 
          Company"                        clause 7 comes within the
                                          definition of "the acquiring 
                                          company" in paragraph 15(1) of
                                          Schedule 9;


         "Affiliate"                      a person or entity that directly or 
                                          indirectly controls, is controlled
                                          by or is under common control with 
                                          another person or entity;
         "Any Other                       any scheme other than the Programme 
         Approved Scheme"                 established by the Company
                                          or by any Associated Company and 
                                          approved in accordance with
                                          Schedule 9 but excluding for the
                                          purposes of this definition any
                                          savings-related share option
                                          scheme or profit sharing scheme
                                          so established;

         "Approval Date"                  the date on which the
                                          Company receives written
                                          notification from the Board of
                                          Inland Revenue that the Programme
                                          has received Revenue Approval;

         "Associated                      any company which is an associated 
          Company"                        company of the Company
                                          within the meaning of section 
                                          416(1) of the Taxes Act;

         "Board"                          the board of directors for the 
                                          time being of the Company;

         "Change in Control"              shall for the purposes of clause 
                                          6.7 mean the occurrence of one of
                                          the following events:

                                          (i)       the acquisition by any
                                                    Person of beneficial
                                                    ownership (within the
                                                    meaning of Rule 13d-3
                                                    promulgated under the
                                                    Act) of fifty percent
                                                    (50%) or more of the
                                                    Voting Stock;

                                          (ii)      the majority of the
                                                    Board consists of
                                                    individuals other than
                                                    Incumbent Directors;

                                          (iii)     the Company adopts any
                                                    plan of liquidation
                                                    providing for the
                                                    distribution of all or
                                                    substantially all of
                                                    its assets;


                                  - 3 -

                                          (iv)       all or substantially
                                                     all the assets or
                                                     business of the
                                                     Company is disposed of
                                                     pursuant to a merger,
                                                     consolidation or other
                                                     transaction (unless
                                                     the shareholders of
                                                     the Company
                                                     immediately prior to
                                                     such merger,
                                                     consolidation or other
                                                     transaction
                                                     beneficially own,
                                                     directly or
                                                     indirectly, in
                                                     substantially the same
                                                     proportion as they
                                                     owned Voting Stock of
                                                     the Company, all of
                                                     the Voting Stock or
                                                     other ownership
                                                     interests of the
                                                     entity or entities, if
                                                     any, that succeed to
                                                     the business of the
                                                     Company);

                                          (v)        the Company combines
                                                     with another company
                                                     and is the surviving
                                                     corporation but,
                                                     immediately after the
                                                     combination, the
                                                     shareholders of the
                                                     Company immediately
                                                     prior to the
                                                     combination hold,
                                                     directly or
                                                     indirectly, 50% or
                                                     less of the Voting
                                                     Stock of the combined
                                                     company (there being
                                                     excluded from the
                                                     number of shares held
                                                     by such shareholders,
                                                     but not from the
                                                     Voting Stock of the
                                                     combined company, any
                                                     shares received by
                                                     Affiliates of such
                                                     other company in
                                                     exchange for stock of
                                                     such other company);

         "Committee"                      the Compensation Committee of the 
                                          Board or such other committee
                                          as the Board shall designate to 
                                          administer the Plan;
 
         "Company"                        ACE Limited, a Corporation 
                                          incorporated in the Cayman Islands;

         "Control"                        for the purposes of clause 7, the 
                                          control of a company within the
                                          meaning given to that expression by 
                                          section 840 of the Taxes Act;

         "Controlling                     a company, other than the Company 
          Company"                        and an Acquiring Company,
                                          which falls within sub-paragraphs  
                                          10(b) or 10(c) of Schedule 9;


                                                     - 4 -

         "Disability"                     a Participant shall be considered
                                          to have a "Disability" during the
                                          period in which he is unable by
                                          reason of a medically
                                          determinable physical or mental
                                          impairment to engage in any
                                          substantial gainful activity,
                                          which condition, in the opinion
                                          of a physician selected by the
                                          Committee, is expected to have a
                                          duration of not less than 120
                                          days;

         "Eligible                        Employee" any person whose terms
                                          of employment require him to
                                          devote substantially the whole of
                                          his time to working for any
                                          member or members of the ACE
                                          Group, except for;

                                          (i)       any director of a
                                                    member or members of
                                                    the ACE Group who is
                                                    contracted to work for
                                                    less than 25 hours a
                                                    week (excluding meal
                                                    breaks) in that
                                                    capacity; and

                                          (ii)      any person who is 
                                                    prohibited from partici-
                                                    pating in the Programme
                                                    by the provisions of 
                                                    paragraph 8 of Schedule 9;

       "Exercise Price"                   the price per Share
                                          payable on the exercise of an
                                          Option as determined by the
                                          Committee but in no event less
                                          than the greater of:

                                          (i)       the nominal value of a 
                                                    Share (if the Shares are 
                                                    to be subscribed); and

                                          (ii)      the Fair Market Value of a 
                                                    Share on the day on which
                                                    the Option is granted;

         "Fair Market Value"             the value of a Share on any day being:

                                          (i)        if and for so long as
                                                     the Company's Shares
                                                     are admitted to the
                                                     official list of the
                                                     New York Stock
                                                     Exchange, the closing
                                                     market composite price
                                                     for Shares as reported
                                                     on the New York Stock
                                                     Exchange - Composite
                                                     Transactions on that
                                                     date or if the New
                                                     York Stock Exchange is
                                                     closed on that date,
                                                     the last preceding
                                                     date on which the New
                                                     York Stock Exchange
                                                     was open for trading
                                                     and on which the
                                                     Shares were traded
                                                     PROVIDED THAT such
                                                     date shall not be a
                                                     date which is more
                                                     than 30 days before
                                                     the date of grant of
                                                     an Option; or



                                                     - 5 -

                                          (ii)      in all other cases, the
                                                    market value determined
                                                    in accordance with Part
                                                    VIII of the taxation of
                                                    Chargeable Gains Act
                                                    1992 and if and for so
                                                    long as the Programme
                                                    has Revenue Approval
                                                    agreed in advance with
                                                    the Shares Valuation
                                                    Division of the Inland
                                                    Revenue;

         "Incumbent Directors"            the individuals
                                          constituting the Board as of the
                                          date the Plan was adopted and any
                                          subsequent directors whose
                                          election or nomination for
                                          election by the Company's
                                          stockholders was approved by a
                                          vote of three quarters (3/4) of
                                          the individuals who are then
                                          Incumbent Directors;

         "Normal Retirement               the voluntary termination of 
          Age"                            employment at a time when the
                                          Participant has attained normal 
                                          retirement age under the ACE
                                          Limited Employee Retirement Plan
                                          or any other retirement benefits
                                          scheme maintained by a company in
                                          the ACE Group or such other age
                                          as shall be determined by the
                                          Committee in its sole discretion;

         "Option"                         subject to clause 7, a right to 
                                          acquire Shares pursuant to the
                                          provisions of the Programme;

         "Option Period"                  subject to clause 6, the period
                                          ending no later than ten years
                                          from the date of an Option
                                          during which an Option shall be
                                          exercisable in accordance with
                                          the provisions of the Programme
                                          as determined by the Committee
                                          at the date of grant of the
                                          Option provided that the Option
                                          may not be exercisable before
                                          the Participant has completed
                                          one year's service with the
                                          Group;

       "Participant"                      an Eligible Employee who has been 
                                          granted an Option or where
                                          applicable, the personal represent-
                                          ative(s) of any such person;

         "Person"                         person for the purposes of the 
                                          definition of "Change in Control"
                                          has the same meaning as set forth 
                                          in Sections 3(a)(9) and 13(d) of
                                          the Act;

         "Plan"                           the ACE Limited 1995 Long-Term
                                          Incentive Plan approved by the
                                          stockholders of the Company in
                                          general meeting on 9 February
                                          1996 and as subsequently amended;



                                   - 6 -

         "Programme"                      the Programme adopted on 12 November 
                                          1997 as from time to
                                          time amended in accordance with the 
                                          provisions hereof;

         "Related Company"                any company which is a subsidiary 
                                          corporation as defined in
                                          Section 424(f) of the Internal 
                                          Revenue Code of 1986;

         "Revenue Approval"               approval of the Programme by the 
                                          Board of Inland Revenue under
                                          Schedule 9;

         "Schedule 9"                     Schedule 9 to the Taxes Act;

         "Shares"                         subject to clause 7.3(a), Stock 
                                          which satisfies the requirements of
                                          paragraphs 10 to 14 inclusive of 
                                          Schedule 9;

         "Stock"                          shares of the common stock of the 
                                          Company;


         Subsidiaries"                    those companies over which for
                                          the time being the Company has
                                          Control and which are
                                          subsidiaries of the Company
                                          within the meaning of Section 736
                                          of the Companies Act 1985;

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

         "Voting                          Stock" capital stock if any class
                                          or classes having general voting
                                          power under ordinary
                                          circumstances in the absence of
                                          contingencies to elect the
                                          directors of a company.


                                     - 7 -

2.2      Any reference herein to a statutory provision shall include a
         reference to that provision as amended or re-enacted from time to
         time. Where the context permits the singular shall include the
         plural and vice versa and the masculine gender shall include the
         feminine.

3.       Grant of Options

3.1      Subject to the limits contained in clause 4, at any time after the
         Approval Date, the Committee may, in its absolute discretion grant
         an Option to an Eligible Employee in accordance with the
         Programme. The Committee shall give notice in writing to the
         Eligible Employee to specify:

         (a)      the number of Shares in respect of which the Option is 
                  granted,

         (b)      the date on which it is granted,

         (c)      the Exercise Price,

         (d)      the objective performance target(s), if any, imposed by
                  the Committee, the terms of which must, at any time when
                  the Programme has Revenue Approval, be approved by the
                  Board of Inland Revenue; and

         (e)      the Option Period.

3.2      The grant of an Option shall be made on the basis that
         participation in the Programme shall be deemed to constitute an
         agreement to be bound by the Programme Rules and shall be
         evidenced by an instrument in such form as the Committee may from
         time to time prescribe. The instrument shall be issued as soon as
         practicable after the date of grant.

3.3      An Option shall be personal to the Participant and may not be
         transferred except as designated by the Participant by will or by
         the laws of descent, or, subject to the provisions of clause 6.2,
         exercised by any other person. In no event shall an Incentive
         Stock Option be transferable to the extent that such
         transferability would violate the requirements of the Inland
         Revenue Code 1986 Section 422. Any attempt to so transfer or sell
         an Option shall cause the Option to lapse forthwith.

4.       Limitations on Grant of Options

4.1      No Option shall be granted pursuant to clause 3 if such grant
         would exceed the limits imposed on the grant of rights under the
         Plan pursuant to section 6 of the Plan with respect to the number
         of Shares which may be made the subject of Options and other
         rights under the Plan.

4.2      No Option shall be granted to an Eligible Employee pursuant to the
         Programme if as a result the total Option Price of the Shares
         issuable on the exercise of such Option when aggregated with the
         total market price at the relevant date of grant of shares still
         capable of being issued on the exercise of options previously
         granted to him under the Programme and Any Other Approved Scheme
         would exceed (pound)30,000 (or its equivalent in any other
         currency, taking as the rate of exchange the spot rate for the
         currency in question on the date of grant of the Option as quoted
         by any of the Company's bankers from time to time).






                                                     - 8 -


5.       Exercise of Options

5.1      Subject to clause 6, an Option shall only be exercised by a
         Participant within the Option Period by his giving to the
         Secretary of the Company at its corporate headquarters, written
         notice, which shall be in such form as may be prescribed by the
         Committee and shall be signed by the Participant. An Option may be
         exercised in whole or in part. Such notice shall specify the
         number of Shares in respect of which the Option is being exercised
         and shall be accompanied by payment in full of the total Exercise
         Price for the said Shares and the instrument evidencing the grant
         of the relevant Option for cancellation or amendment.

5.2      Payment for the Option exercised shall be in cash, or cheque, bank
         draft or money order to the order of the Company, for an amount in
         United States dollars equal to the total Exercise Price for the
         number of Shares in respect of which an Option is exercised.

5.3      The Committee shall transfer the appropriate number of Shares to
         the Participant at their Exercise Price as soon as possible but in
         any event not later than one month after the date of exercise of
         the Option and shall deliver where appropriate to the Participant
         a definitive share certificate in respect thereof. Any Shares
         issued pursuant to this clause 5.3 shall rank pari passu in all
         respects and form a uniform class with Shares already in issue.
         While an Option is unexercised, a Participant shall have no voting
         rights or any other rights of stockholders with respect to the
         Shares which are subject to his Option. Furthermore, no cash
         dividends shall accrue or be payable with respect to any such
         Shares. Shares subject to unexercised Options shall have no
         subscription rights.

6.       Time for Exercise of Options

6.1      Subject to clauses 6.2 to 6.4 inclusive, an Option may only be
         exercised during its Option Period. An Option which is not so
         exercised shall lapse PROVIDED THAT, at the time of exercise of
         his Option a Participant is not prohibited from doing so by the
         provisions of paragraph 8 of Schedule 9.

6.2      If a Participant dies his Option may be exercised in full by his
         personal representative(s) at any time before the expiry of its
         Option Period and within but not later than 12 months of his
         death.
         Any such Option which is not so exercised shall lapse.

6.3      If a Participant ceases to be employed by the Company or a Related
         Company by reason of Disability, he may exercise his Option in
         full at any time before the expiry of its Option Period and within
         12 months after the date of cessation of his employment. Any such
         Option which is not so exercised shall lapse.

6.4      If a Participant ceases to be employed by the Company or a Related
         Company by reason of retirement on or after Normal Retirement Age
         or earlier retirement with consent of his employer, he may
         exercise his option to the extent exercisable by him at the time
         of such cessation at any time before the expiry of its Option
         Period or his death if earlier.

6.5      If a Participant ceases to be employed by the Company or a Related
         Company otherwise than by reason of the events specified in
         clauses 6.2 to 6.4, he may exercise his option to the extent
         exercisable by him at the time of such cessation at any time
         before the expiry of its Option Period and within three months
         after the date of cessation of his employment. Any such Option
         which is not so exercised shall lapse.

6.6      For the purposes of this paragraph where a Participant's
         employment is terminated without notice or on terms in lieu of
         notice it shall be deemed to cease on the date on which the
         termination takes effect and where the said employment is
         terminated with notice it shall cease on the date when the notice
         period expires.






                                                     - 9 -


6.7      If a Change in Control of the Company shall occur a Participant
         may exercise his Option in full at any time before the expiry of
         its Option Period PROVIDED THAT this clause 6.7 shall not apply
         where a Participant by agreement with an Acquiring Company,
         releases his Option in consideration of the grant to him of a New
         Option pursuant to clause 7 before the expiry of the appropriate
         period referred to in clause 7.4.

7.       Replacement of Options on a takeover or other change in Control of 
         the Company

7.1      Clause 7.2 below shall apply where an Acquiring Company obtains
         Control of the Company as a result of making:

         (a)      a general offer to acquire the whole of the issued share
                  capital of the Company (other than that which is already
                  owned by it and/or by any of its subsidiaries) made on a
                  condition such that if it is satisfied the Acquiring
                  Company will have Control of the Company; or

         (b)      a general offer to acquire all the Shares (or such Shares
                  as are not already owned by the Acquiring Company and/or
                  by any of its subsidiaries).

7.2      A Participant may at any time within the appropriate period as
         defined in clause 7.4, by agreement with the Acquiring Company,
         release any of his Options (the "Old Option" for the purposes of
         this clause) in consideration of the grant to him of a new option
         (the "New Option" for the purposes of this clause) PROVIDED THAT
         any New Option satisfies the conditions set out in clause 7.3.

7.3      The New Option must:

         (a)      be over shares in the Acquiring Company or a Controlling
                  Company which shares satisfy the conditions specified in
                  paragraphs 10 to 14 inclusive of Schedule 9 (references
                  to the term "Shares" in this Programme shall thereafter
                  be construed accordingly);

         (b)      be a right to acquire such number of shares which on
                  acquisition of the New Option have an aggregate market
                  value (determined in accordance with Part VIII of the
                  Taxation of Chargeable Gains Act 1992) equal to the
                  aggregate market value of the Shares the subject of the
                  Old Option immediately before its release;

         (c)      have an exercise price per share such that the aggregate
                  price payable on complete exercise of the New Option
                  equals the aggregate price which would have been payable
                  on complete exercise of the Old Option at the time of its
                  release.

7.4      The appropriate period referred to in clause 7.2 is the period of
         six months commencing on the date when the Acquiring Company
         making the offer has obtained Control of the Company and any
         condition subject to which the offer is made is satisfied.

7.5      The New Option shall be exercisable in the same manner as the Old
         Option and in accordance with the provisions of the Programme as
         it had effect in relation to the Old Option immediately before its
         release (references to the term "Option" in the Programme
         thereafter being construed accordingly), and the New Option shall,
         for all purposes of the Programme other than clause 7.6, be
         treated as having been granted on the date when the corresponding
         Old Option was granted.

7.6      With effect from the grant of a New Option hereunder clause 5,
         this clause 7, and clauses 8, 9 and 11 shall, in relation to the
         New Option, be construed as if references to the Company were
         references to the Acquiring Company, or as the case may be, the
         Controlling Company.








                                                     - 10 -


8.       Variations in the Share Capital of the Company

8.1      If at any time after the date of grant of an Option and before it
         ceases to be exercisable, there is a variation or reorganisation
         of Stock or other capital of the Company, including, without
         limitation, any subdivision or consolidation of shares or stock or
         other capital readjustment, stock split, payment of stock
         dividend, combination of shares or recapitalisation or other
         increase or reduction of the number of shares or stock
         outstanding, without receiving compensation therefor in money,
         services or property or otherwise with respect to its common
         stock, the number of Shares available under the Programme shall be
         adjusted and the number then subject to Options and the Exercise
         Price therefor shall be proportionately and appropriately adjusted
         all as the Committee shall deem appropriate PROVIDED THAT:

         (a)      the aggregate Exercise Price payable on the exercise of an 
                  Option previously granted hereunder shall not be increased;

         (b)      the Option Price shall not be reduced below the nominal value
                  of a Share thereby;

         (c)      all such adjustments shall be subject to prior approval by 
                  the Board of Inland Revenue.

8.2      All Participants shall be notified in writing of any such
         adjustments as soon as practicable thereafter and the Committee
         shall be entitled to call in the instruments evidencing the grant
         of the Options affected by such adjustments for endorsement or
         replacement, as may appear appropriate.


9.       Administration of the Programme

9.1      The Programme shall be administered by the Committee.

9.2      Subject as herein otherwise expressly provided the Committee's
         decision on any matter concerning the Programme shall be final and
         binding.

10.      Amendment of the Programme

10.1     Subject to clause 10.2, the Board or the Committee shall at any
         time be entitled to amend by resolution all or any of the
         provisions of the Programme provided that no amendment may
         adversely affect the rights of any participant already acquire by
         him under the Programme.

10.2     No amendment to the Programme shall be effective unless and until
         approved by the Board of Inland Revenue and subject to clause 1.3
         nothing shall be done to the Programme which would prejudice the
         obtaining of Revenue Approval or cause it to be withdrawn.

11.      Additional Provisions

11.1     Every Option shall be subject to the condition that no Shares
         shall be issued to a Participant following the exercise of an
         Option if such issuance would be contrary to any enactment or
         regulation for the time being in force of the United States or of
         any other country having jurisdiction in relation thereto. The
         Company shall not be bound to take any action to obtain the
         consent of any governmental authority to such issue or to take any
         action to ensure that any such issuance shall be in accordance
         with any such enactment or regulation if such action could in the
         opinion of the Committee be unduly onerous.

11.2     Every Option shall be subject to the requirement that if at any
         time the Board shall determine, in its discretion, that the
         listing, registration or qualification of the Shares subject to an
         Option upon any securities exchange or under any state or federal
         law, or that the consent or approval







                                                     - 11 -

         of any governmental authority, is necessary or desirable as a
         condition of, or in connection with, the issuance or purchase of
         shares under an Option such Option may not be exercised in whole
         or in part, unless such listing, registration, qualification,
         consent or approval shall have been effected or obtained free of
         any conditions not acceptable to the Board. Any Option may be
         exercised only in accordance with the provisions of all applicable
         law.

11.3     The rights and obligations of a Participant under his terms of
         employment with any member of the ACE Group shall not be affected
         by his participation in the Programme and the Programme shall not
         afford to a Participant any right to continued employment or any
         additional right to compensation in consequence of the termination
         of his employment for any reason whatsoever.

12.      Termination

         the Committee may at any time resolve to cease making further
         grants of Options under the Programme but in such event the
         subsisting rights of Participants shall not thereby be affected.