Via EDGAR Transmission
- ----------------------

Ms. April Sifford
Branch Chief
Division of Corporation Finance
United States Securities and Exchange Commission
100 F Street, N.E.
Washington, D.C. 20549-7010



19th October 2006


BG Group plc
Form 20-F for the Fiscal Year Ended December 31, 2005
Forms 6-K for the Fiscal Quarters Ended March 31, 2006 and June 30, 2006
(File No. 1-9337)


Dear Ms. Sifford,

We are writing in response to your letter of September 27, 2006, containing
comments with respect to the Form 20-F Report of BG Group plc ('BG Group') for
the fiscal year ended December 31, 2005 (the 'Form 20-F') and the Forms 6-K for
the fiscal quarters ended March 31, 2006 and June 30, 2006. For your
convenience, we have repeated your comments along with our reply. Capitalised
terms used in this letter without definition are used as defined in the Form
20-F. Page references made in this letter, unless otherwise indicated, are to
pages in our Annual Report and Accounts 2005 (attached as exhibit 15.2 to the
Form 20-F).

Form 20-F for the Fiscal Year Ended December 31, 2005
- -----------------------------------------------------

Annual Report and Accounts 2005
- -------------------------------

Operating Results, page 22
- --------------------------

1.   We note that your E&P group sells about 70% of its UK gas production under
     various contracts that are not on a short-term basis. Tell us the nature
     and terms of these contracts, and how you account for them. In particular,
     address any material contract terms that have significant impact with
     regard to your revenue recognition policies.

     BG Group sells gas in the UK market under contracts which may be over one
     year in duration. Within these contracts, volumes are generally expressed
     in daily and annual contract quantities. These quantities generally must be
     purchased by the counterparties within the defined timescales. The price
     obtained under these contracts is set at the beginning of the contract and
     is generally adjusted annually according to a pre-agreed formula.




                                                                          Page 2


     Revenue is recognised under all of these contracts in accordance with IAS
     18 paragraph 14, in particular when the risks and rewards of ownership of
     the gas have been transferred to the buyer and the amount of revenue can be
     measured reliably. This happens when the counterparty takes title to the
     gas and is measured based on the quantity delivered at the applicable
     contract price. While there are take or pay provisions within some of these
     contracts, we do not recognise revenue until the gas is physically
     delivered. This is in line with our accounting policy on Revenue
     Recognition, disclosed in our Principal accounting policies on page 64.
     Since revenue is recognised on this objective basis (transfer of title)
     revenue recognition on these contracts is straightforward and is not
     affected by any other contract terms.

2.   We note the disclosure "unit lifting costs per BOE" and "unit operating
     expenditure per BOE". Please identify and disclose the following regarding
     this information:

     o    The source of the data used,

     Unit lifting costs per BOE are calculated by taking Production costs shown
     on page 132 less insurance and tariff Costs (not separately identified),
     and production shown on page 133. The calculation for 2005 was therefore:

            Production costs (p132) - insurance costs - tariff Costs
            --------------------------------------------------------
                      Total mmboe gas, oil & liquids (p133)

          = (pound)332,000,000 - (pound)9,000,000 - (pound)105,000,000
            ----------------------------------------------------------
                                 183,800,000 boe

                              =(pound)1.19 per boe

     Unit operating expenditure per BOE can be calculated by taking Production
     costs and royalties (Other operating costs) shown on page 132 and
     production shown on page 133. The calculation for 2005 was therefore:

             Production costs (p132) + Other operating costs (p132)
             ------------------------------------------------------
                      Total mmboe gas, oil & liquids (p133)

                    = (pound)332,000,000 + (pound)75,000,000
                      --------------------------------------
                                 183,800,000 boe

                              =(pound)2.21 per boe

     We provided a definition of 'Annual unit operating cost' in Definitions on
     page 153.

     In future filings we propose to include a definition of unit lifting costs
     per boe in the same way as we currently do for unit operating costs.

     o    How management uses these measures,




                                                                          Page 3


     Management uses these ratios to monitor the overall operating efficiency of
     producing assets. Unit operating expenditure per BOE is useful as an
     indicator of the total unit cost of operating our producing E&P assets and
     we believe that investors find this information useful since our E&P
     business is essentially a commodity business. Unit lifting costs per BOE
     focuses on production costs in the field and excludes tariff, insurance and
     royalty costs.

     o    The limitations of the measures

     These ratios focus on a particular group of historical costs and at a
     company level they represent an average of a number of fields which may
     have different cost structures. Their usefulness is therefore primarily
     limited to backward-looking information at a company aggregate level.

     o    Whether the measures are comparable to other like measures disclosed
          by other companies.

     These ratios are used by management to measure performance over time and we
     believe that they are useful as they allow investors to do the same. We
     believe that the information we disclose about our Unit operating
     expenditure is comparable with like measures disclosed by other companies.
     In addition, we disclose unit lifting costs as we believe that this is also
     useful to investors.

3.   On a related note, tell us whether you consider these measures to be
     non-GAAP measures, as defined by Item 10(e)(2) of Regulation S-K. If you do
     consider them non-GAAP measures, supplementally explain why it is
     appropriate to disclose it in Commission filings based on the conditions
     identified in Item 10(e)(1)(ii). If it is determined that it is appropriate
     to disclose the non-GAAP measures in Commission filings, provide the
     disclosure required by Item 10(e)(1)(i) and Question 8 of the Frequently
     Asked Questions Regarding the Use of Non-GAAP Financial Measures, which can
     be located at

     http://www.sec.gov/divisions/corpfin/faqs/nongaapfaq.htm.
     ---------------------------------------------------------

     We do not consider the ratios unit lifting costs per BOE and unit operating
     expenditure per BOE to be non-GAAP measures. We believe that they fall
     within the exclusion described in Item 10(e)(4)(ii); that is they are
     ratios or other statistical measures calculated using exclusively financial
     measures calculated in accordance with IFRS.

Cash flow before financing, page 26
- -----------------------------------

4.   We note the disclosure "cash flow before financing costs". Tell us whether
     you consider this disclosure a non-GAAP measure, as defined by Item
     10(e)(2) of Regulation S-K. If so, provide the disclosure required by Item
     10(e)(1)(i). In addition, in your response, please describe how management
     uses this measure and why you believe it is useful information to an
     investor.

     Cash flow before financing costs is a subtotal obtained from GAAP measures
     identified in the Group's cash flow statement on page 70 and is clearly
     captioned as an item which is before cash flows associated with



                                                                          Page 4


     the Group's financing. As such, we do not believe it is a non-GAAP
     measure. It was used to provide a tabular presentation of the cash flows
     discussed in the narrative in the Financial Review. In this narrative
     section, the cash flows associated with financing are clearly identified.
     Cash flow before financing provides investors with information on the cash
     flows available for dividends, interest payments, share repurchases and
     debt servicing, which we believe they find useful.

Principal Accounting Policies
- -----------------------------

Revenue Recognition, page 64
- ----------------------------

5.   Disclose your revenue recognition policies for gas sales under long-term
     contracts discussed on page 22, as required by International Accounting
     Standard (IAS) Number 18, paragraph 35.

     Our principal accounting policy for revenue recognition on page 64 states
     that 'revenue associated with exploration and production sales (of crude
     oil and petroleum products) is recorded when title passes to the customer.'

     Petroleum products include natural gas and this policy therefore covers gas
     sales. As noted in response to Question 1 above, revenue in respect of gas
     sold under long-term contractual arrangements is recognised when title to
     the gas passes to the customer. It should be noted that the stage of
     completion method of revenue recognition referred to in IAS 18 paragraph 35
     is not applied to these arrangements. As such, we consider that the
     accounting policy set out on page 64 adequately discloses the revenue
     recognition policy for such sales.

Exploration Expenditure, page 64
- --------------------------------

6.   You have disclosed your policy with regard to impairment testing is
     performed at the cash generating unit level under IFRS. Tell us if any
     difference in impairment amounts recognized under IFRS resulted from this
     analysis performed at the cash generating unit level as compared to the
     grouping of long lived assets to be held and used under U.S. GAAP,
     specifically Statement of Financial Accounting Standards (SFAS) 144,
     paragraphs 10 through 14. If impairments recognized under these standards
     differ, please expand and revise the disclosures in your footnote 21
     discussion of U.S. Generally Accepted Accounting Principles (GAAP) to
     address them. In your response, please also identify any reversals of prior
     impairment amounts that have been recognized in the financial statements
     presented under IFRS.

     While there are differences in the level at which impairment on exploration
     expenditure is assessed under IFRS and US GAAP, these differences did not
     result in any difference in amounts recognised for impairment under IFRS
     and US GAAP. No impairments were recognised in respect of exploration
     assets under either IFRS or US GAAP.

     No reversals of prior impairment amounts were recognised in the financial
     statements prepared under IFRS.

Commodity Instruments (from January 1, 2005), page 65
- -----------------------------------------------------



                                                                          Page 5


7.   We note certain gas contracts and related derivative instruments associated
     with the purchase and re-sale of third-party gas are presented on a net
     basis in the financial statements. Please provide an example of such
     arrangements and how they are accounted for under IFRS. In addition, please
     tell us if or how these arrangements differ from buy-sell arrangements
     under US GAAP and the differences, if any, in accounting for such
     arrangements under the guidance of EITF 04-13.

     Gas contracts for the purchase and re-sale of third-party gas are presented
     on a net basis in the financial statements. An example of such an
     arrangement is the forward sale of gas, whereby gas is bought on the
     short-term market and re-sold within a day, week or month.

     Under the provisions of IAS 39 paragraphs 5 and 9 and FAS 133 paragraphs 6
     and 9 such transactions meet the definition of a derivative instrument.
     Prior to the physical receipt or delivery of the gas these contracts are
     recorded on the balance sheet at fair value with subsequent movements in
     fair value recorded within "Other operating income". The profit or loss
     realised on the physical purchase and sale of the third party gas is
     presented net within "Other operating income".

     EITF 04-13 considers buy-sell arrangements as transactions for the purchase
     and sale of inventory entered into concurrently, or in contemplation of one
     another, with the same counterparty. The third-party gas purchase and
     re-sale activities undertaken by BG Group are primarily executed through
     brokers and there is no contemplation of the counterparty used.
     Accordingly, these arrangements are not buy-sell arrangements under US
     GAAP. We also note that arrangements for the purchase and sale of inventory
     that are accounted for as derivatives under FAS 133 are excluded from the
     scope of EITF 04-13.

     As part of our 20-F filing for 2005 we considered the impact of EITF 04-13
     and concluded that the Consensus had no impact on our current accounting
     practice (see US Generally Accepted Accounting Principles - New US GAAP
     Standards, page 115).


Note 2 - Segmental Analysis and Results Presentation, page 71
- -------------------------------------------------------------

8.   We note your disclosure of "Business Performance" on a segment basis and
     discussion of such presentation on a segment basis to provide readers with
     a more clear and consistent understanding of your performance under
     requirements of IAS 14. However, we also note you have disclosed and
     discussed this measure throughout your filing, outside of the disclosure
     requirements of IAS 14, on a consolidated basis. Please note we believe the
     presentation of business performance on a consolidated basis is subject to
     the provisions of Item 10(e) of Regulation S-K. We refer you to Question 21
     of the Frequently Asked Questions Regarding the Use of Non-GAAP Financial
     Measures issued on June 13, 2003 for further guidance. It remains unclear
     whether the disclosure of business performance on a consolidated basis is
     permissible under Item 10(e)(ii). Supplementally tell us why you believe
     the presentation of this non-GAAP financial measure meets the provisions of
     Item 10(e) and identify where you have provided the required disclosures
     within the filing. In your response please address the items discussed in
     Questions 8 and 9 of the Frequently Asked



                                                                          Page 6

     Questions Regarding the Use of Non-GAAP Financial Measures issued on June
     13, 2003.

     As part of our 20-F filing for 2005, we considered the disclosure of
     Business Performance on a consolidated basis and concluded that it was
     subject to the provisions of Item 10(e) of Regulation S-K.

     We consider the disclosure of Business Performance on a consolidated basis
     to be permissible under Item 10 (e)(1) (ii) and can be assessed against the
     criteria set out in that section as follows:

     Sub paragraph (A) prohibits registrants from excluding charges or
     liabilities that require, or will require, cash settlement absent an
     ability to settle in another manner, from a non-GAAP liquidity measure. We
     believe that this does not prevent the presentation of Business Performance
     since it is not a liquidity measure.

     Sub paragraph (B) does not allow registrants to 'adjust a non-GAAP
     performance measure to eliminate or smooth items identified as
     non-recurring, infrequent or unusual, when the nature of the charge or gain
     is such that it is reasonably likely to recur within two years or there was
     a similar charge or gain within the prior two years.' We do not describe
     Business Performance as excluding non-recurring items and recognise that
     disposals and re-measurement gains and losses could be considered as
     recurring.

     Furthermore, we note that the answer to Question 8 from the Frequently
     Asked Questions states that there is no per se prohibition against removing
     a recurring item, whilst recognising that companies must meet the burden of
     explaining the usefulness of any such measure. We consider that a full
     explanation of the usefulness of Business Performance is provided on Page
     152 of the filing. Our discussion on page 152 describes what is excluded
     from Business Performance and the substantive reasons why management
     believes exclusion of these items provides investors with a clear and
     consistent presentation of the underlying operating performance of the
     Group's ongoing business and the underlying economic substance behind that
     belief. In particular, we note on page 152 that the use of Business
     Performance best reflects the underlying performance of the business since
     it distinguishes between the temporary timing differences associated with
     re-measurements under IAS 39 rules and actual realised gains and losses. In
     addition, it allows separate disclosure of gains and losses associated with
     the disposal of non-current assets and impairments of non-current assets to
     provide a clearer understanding of the results for the period. We also
     explain why the exclusion of disposals provides a 'clearer understanding of
     the results for the period.'

     The measures discussed and disclosed throughout the filing are also
     consistent with the way we present the underlying performance of the
     business in our quarterly earnings releases. As well as being useful to
     investors, we know that analysts also find this measure helpful since we
     provide more rather than less disclosure by disaggregating and separately
     explaining these components of the income statement.



                                                                          Page 7

     Business Performance is also one of the primary measures used by management
     in its management of the Group.

     As Business Performance is not used on the face of the annual financial
     statements or another note to the annual financial statements other than
     Note 2 'Segmental Analysis and Results Presentation' we do not consider its
     presentation to contravene the requirements of sub paragraph (C). We
     believe that Business Performance on a consolidated basis is permissible
     within the context of segmental reporting as we have presented it in Note
     2, on the basis that the consolidated segment profit or loss measure is
     presented to meet the reconciliation requirements within segmental
     reporting, as clarified in Question 21 of the Frequently Asked Questions.

     Nor do we consider the presentation of Business Performance to be
     prohibited by either sub paragraph (D) or (E) as it is presented neither in
     the context of Pro forma financial information nor is it either titled or
     described in a way which could cause it to be confused with a GAAP
     financial measure.

     In recognition of the use of a non-GAAP measure, we believe we have
     provided the information required by Regulation S-K 10(e)(1)(i). A
     reconciliation to GAAP has been provided in Note 2. Equal prominence has
     also been given to both GAAP and non-GAAP measures in the 2005 highlights
     under clearly labeled captions shown on the inside front cover and the
     profit for the year table shown in the Financial Review on page 24. As
     explained above, a detailed explanation for management's reasons for, and
     the underlying economic substance behind, using the non-GAAP measures is
     set out on page 152. Furthermore, note references on each of the pages
     where these non-GAAP measures appear direct the reader to the quantitative
     reconciliations to GAAP and qualitative explanations of these measures.

9.   Please explain why the geographic areas identified in your segmental
     analysis presented in Note 2 differ from the geographic areas reported in
     the supplemental information regarding proved reserves on page 128. In your
     response, please also address why you have combined Egypt with the Atlantic
     Basin geographic area.

     Paragraph 31 of IAS 14 describes how geographic segments should be selected
     for external reporting. In particular, it states that the segments should
     be those organisational units for which information is provided to the
     board of directors and to the chief executive officer for the purpose of
     evaluating the unit's past performance and for making decisions about
     future allocations of resources. The geographic segments disclosed in Note
     2 are in line with this guidance.

     For the purposes of additional reporting of E&P activities only,
     disclosures were made, as required, in accordance with FAS 69. Paragraph 12
     of FAS 69 requires reserves of oil and gas to be separately disclosed for
     an enterprise's home country and each foreign geographic area in which
     significant reserves are located. FAS 69 states: 'Foreign geographic areas
     are individual countries or groups of countries as appropriate for
     meaningful disclosure in the circumstances.'




                                                                          Page 8


     Accordingly, we identified the UK (the Group's home country) as one of the
     reportable geographic areas. In addition, we selected foreign geographic
     areas disclosed in the supplementary information which grouped reserves to
     reflect the nature of markets for BG Group's proved gas and oil reserves in
     these countries. In particular, a large proportion of the gas reserves
     located in Egypt is used to supply the Atlantic Basin market via our LNG
     projects in Egypt.

     Additional disclosure on the reasons for the geographic presentation
     adopted for reserves was provided in Form 20-F for 2004, as an introductory
     paragraph to the Supplementary information and is included below for
     information.

     'BG Group's strategy aims to connect competitively priced gas to high value
     markets. Hydrocarbon reserves, and gas in particular, are developed in
     relation to the markets which they are intended to supply. Based on the
     above, the information below is disclosed on the basis of the following
     geographic areas: (i) the United Kingdom, (ii) Atlantic Basin, (iii) Asia
     and the Middle East, and (iv) Rest of the World. The countries in the
     Atlantic Basin and Asia and the Middle East geographic areas are grouped to
     reflect the nature of markets for BG Group's proved gas and oil reserves in
     those countries.

     The allocation of the countries within these areas is:
     Atlantic Basin - Canada, Egypt, Trinidad and USA
     Asia and the Middle East - India, Kazakhstan, Thailand, Israel and the
     Areas of Palestinian Authority
     Rest of the World - Bolivia, Brazil, Italy, Mauritania, Norway, Spain,
     Tunisia and Venezuela.'

Note 12 - Other Intangible Assets, page 86
- ------------------------------------------

10.  We note you have recorded (pound)340 m in unproved oil and gas reserve
     expenditures during fiscal year 2004 that relates to the acquisition of a
     subsidiary. Please expand your disclosures to describe the nature of this
     amount or tell us where such disclosure is currently located within the
     document.

     IFRS 3 paragraph 66 requires disclosures of business combinations that were
     effected during the period or between the balance sheet date and the
     approval of the financial statements to enable users to evaluate the nature
     and financial effect of these business combinations. Accordingly, no
     information in respect of 2004 acquisitions was included in our 2005 20-F.

     We provided more detail on the nature of the assets acquired through the
     acquisition of subsidiaries in the 20-F filing in 2004. Note 14 of these
     Financial Statements provided the required disclosures under FRS 6
     paragraphs 21 to 35 (UK GAAP). An extract from the 2004 20-F is attached as
     Appendix 1 for ease of reference.

     The fair values of the assets and liabilities acquired were restated on
     adoption of IFRS in 2005. Details of these restatements were provided in
     Note 33 (page 119) of the 2005 Financial Statements.

11.  We note the use of the term "backfill". Define what this term means.




                                                                          Page 9


     BG Group's business includes a number of long term contractual commitments
     requiring multiphase developments over the period of the commitments. The
     term "backfill" is used on three occasions in Note 12, as follows:

        - Rosetta                       Backfill to existing gas sales agreement
        - Buzzard N. Terrace (UK)       Backfill to existing development
        - Palo Marcado (Bolivia)        Planned backfill to existing gas sales
          agreement

     Long-term sales or infrastructure agreements often require phased
     development to optimise use of the contractual arrangement. Hence, where
     the commitments can be met currently from existing fields, the development
     of discovered fields is deferred until existing sources decline and sales
     contract or infrastructure capacity becomes available.

     The term "backfill" is used to describe reserves that will refill or
     replace existing resources or capacity, or satisfy existing commitments.
     Gas produced from Rosetta and Palo Marcado will be used to meet existing
     gas sales contractual commitments when the current gas source depletes. For
     Buzzard N. Terrace, the hydrocarbons produced from the future development
     will utilise infrastructure capacity which will become available as
     existing sources decline.

     Although we believe this term is generally understood, we propose to
     include a definition of backfill in future filings.

12.  Please reconcile the amounts reported in the roll forward of activity in
     other intangible assets during fiscal years 2005 and 2004 with the gross
     exploration expenditures presented at the bottom of the table on page 22.

     The main reconciling item in 2005 and 2004 between the roll forward of
     activity in other intangible assets and the gross exploration expenditures
     reported on page 22 relates to the exploration spend on the North Caspian
     PSA disposal group in Kazakhstan.

     During 2003, BG Group announced its agreement to sell its interest in the
     North Caspian PSA with the disposal being completed in April 2005. During
     2004 and 2005 the disposal group was classified as held for sale and
     accounted for in accordance with IFRS 5. Exploration expenditures
     capitalised against the disposal group of (pound)60 million in 2005 and
     (pound)150 million in 2004 were recorded on the balance sheet within
     "Assets classified as held for sale" and not "Other intangible assets". The
     expenditures were however included in the gross exploration measure
     included in the table on page 22. We included reference to the treatment of
     these exploration costs in footnote (a) to the Capital Investment table on
     page 25 and footnote (b) to the Costs Incurred in Gas and Oil activities
     table on page 131.

     There was an additional reconciling item in 2004 which related to the
     acquisition of a further 40% interest in the Rosetta gas field in Egypt.
     The "Other intangible assets" roll forward includes (pound)4 million in
     relation to intangible assets acquired; we do not classify acquired
     exploration assets as exploration expenditure and hence this amount is not
     included in the gross exploration measure presented on page 22.




                                                                         Page 10


     The tables below show the reconciliation of capitalised exploration
     reported in the roll forward of "Other intangible assets" on page 86 to the
     gross exploration measure presented on page 22.

     OTHER INTANGIBLE ASSETS page 86
     (extract)                                       Expenditure on unproved gas
                                                          and oil reserves
     ---------------------------------------------------------------------------
                                                        2005             2004
                                                      (pound)m         (pound)m
     ---------------------------------------------------------------------------
     Cost as at 1 January                                519              158
     ---------------------------------------------------------------------------
     Additions                                           165              116
     ---------------------------------------------------------------------------
     Acquisition of subsidiary undertakings                -              340
     ---------------------------------------------------------------------------
     Disposals and transfers                            (212)             (92)
     ---------------------------------------------------------------------------
     Currency translation adjustments                     60               (3)
     ===========================================================================
     Cost and net book value as at 31 December           532              519
     ===========================================================================


     RECONCILIATION TO GROSS EXPLORATION EXPENDITURE
     ---------------------------------------------------------------------------
     Other intangible additions (as above)               165              116
     ---------------------------------------------------------------------------
     Add:  Exploration expenditure on North
     Caspian PSA disposal group classified                60              150
     as held for sale
     ---------------------------------------------------------------------------
     Less:  Intangible assets  acquired on
     Rosetta field not classified as an                    -               (4)
     exploration expenditure
     ===========================================================================
     Capitalised exploration expenditure                 225              262
     (page 22)
     ===========================================================================
     Other exploration expenditure expensed to           111               74
     profit/loss
     ===========================================================================
     Gross exploration expenditure (page 22)             336              336
     ===========================================================================


Note 23 - Provisions for Other Liabilities and Charges, page 96
- ---------------------------------------------------------------

13.  Tell us why you have not recorded any new charges in decommissioning costs
     during fiscal years 2005 and 2004. We would expect new decommissioning
     obligations to be incurred as new activity is performed each year. For
     example, as new wells are drilled or other exploration and development
     activity is performed. In addition, in your response, please tell us how
     you have accounted for the decommissioning costs associated with MetroGAS
     upon deconsolidation of its financial results. We may have further comment
     after reviewing your response.

     We operate under various contractual arrangements and legal frameworks in a
     number of countries. Decommissioning obligations, whether legal or
     constructive, do not arise in a number of our material operations.

     When new obligations arise as a result of new wells or other facilities in
     operations where a legal or constructive obligation arises these are




                                                                         Page 11


     treated as adjustments to the existing provision for that field or
     facility. Where an obligation arises for a new field, this is reported as
     an addition to provisions and is disclosed separately, where material. In
     2005 such additions amounted to (pound)5m (2004: (pound)5m), and were
     combined with "transfers and other adjustments".

     We made no provision for decommissioning costs associated with MetroGAS
     because BG Group had no present obligation (legal or constructive) to incur
     such costs. Such obligation is a pre-condition for making a provision under
     IAS 37, paragraph 14. Similarly, FAS 143, paragraph 2 states that the
     provisions it contains relate specifically to legal and constructive
     obligations associated with the retirement of a tangible long-lived asset.


Note 27 - Commitments and Contingencies
- ---------------------------------------

F - Legal Proceedings, page 100
- -------------------------------

14.  Please expand your disclosure of the dispute between First Gas Power
     Corporation and Siemens to provide the information required by IAS 37,
     paragraphs 84-89, with regard to the suspension of liquidating damages to
     which Siemens is entitled.

     As at 31 December 2005, the principal point at issue, namely FGPC's claim
     for (pound)62 million of liquidated damages, had already been decided in
     FGPC's favour as noted in the disclosure. In addition, the tribunal had
     already awarded Siemens certain extensions of time which would have
     entitled them to the suspension of FGPC's claim for liquidated damages had
     those extensions of time exceeded a specified number of days. However, the
     extensions of time awarded to Siemens were not sufficient to prevent FGPC
     from being awarded its liquidated damages claim in full. Accordingly,
     Siemens only claim at that point was for the costs associated with the
     extensions of time that were granted. That issue, together with FGPC's
     counterclaim for defective works, was finally resolved when the tribunal
     issued its final award on 21 April 2006. In that award, Siemens was awarded
     (pound)5 million in respect of the costs associated with the delays for
     which they were granted extensions of time and FGPC was awarded (pound)6
     million in respect of its counterclaim. Subsequently, the parties have
     agreed that Siemens will pay FGPC (pound)6 million in full and final
     settlement of all outstanding claims, including FGPC's costs.

     Given the status of this dispute at 31 December 2005, it was not a matter
     that was required to be disclosed pursuant to Item 8.A.7 of Form 20-F. This
     voluntary disclosure was therefore made simply by way of an update to the
     disclosure made in BG Group's 2004 20-F.

     Turning to the information required by IAS 37, no provisions were
     recognised at the balance sheet date in respect of this dispute. As such
     the requirements of paragraph's 84 and 85 are not applicable.

     Paragraph 86 of IAS 37 requires that, unless the possibility of any outflow
     in settlement is remote, the following is disclosed for contingent
     liabilities:

     (a) an estimate of its financial effect, measured under paragraphs 36-52;




                                                                         Page 12


     (b) an indication of the uncertainties relating to the amount or timing of
         any outflow; and
     (c) the possibility of any reimbursement.

     Where an inflow of economic benefits is probable, paragraph 89 further
     requires a brief description of the nature of the contingent assets at the
     balance sheet date, and where practicable an estimate of their financial
     effect.

     Given the status of this dispute as at 31 December 2005, we assessed the
     possibility of any outflow in respect of this matter as being remote.
     Accordingly, we believe that the disclosures given on page 100 satisfied
     the requirements of IAS 37 within the context of the overall uncertainty of
     a tribunal ruling.

     Although this dispute has now been resolved, we intend to provide a further
     update in the 2006 Annual Report and Accounts which will describe how this
     matter was finally resolved.


Note 30 - Notes to the Consolidated Cash Flow Statement, page 107
- -----------------------------------------------------------------

15.  IAS 7, paragraphs 18 and 20 state cash flows from operating activities
     reported using the indirect method should be presented by adjusting profit
     or loss. Tell us why you believe your starting point of "Operating profit
     before share of results from joint ventures and associates" meets this
     requirement.

     We believe that since profit or loss is not defined within IAS 7 this
     allows preparers a certain amount of flexibility around the starting point
     of the cash flow statement. Our starting point of "Operating profit before
     share of results from joint ventures and associates" was selected as this
     reduces the number of items to be adjusted for to arrive at operating cash
     flow. It is also clearly identified on the face of the income statement.

     With 2005 being the year of first time adoption of IFRS in Europe, many
     companies have had to interpret and apply IFRSs concurrently with the
     emergence of what constitutes common practice. As a result we note there
     have been differing interpretations of IAS 7 among first time adopters. It
     now appears a common interpretation of profit or loss in the context of IAS
     7 which has emerged following the first full year of IFRS is "Profit before
     tax" and we intend to use this as the starting point for the cash flow
     statement in our future filings.

Note 31 - U.S. Generally Accepted Accounting Principles
- -------------------------------------------------------

g), page 111
- ------------

16.  With regard to liquidating damages, tell us what specific IAS standard you
     are relying upon to justify this accounting treatment.

     In considering the appropriate accounting treatment for liquidated damages
     under IFRS, we had regard to the following accounting standards:

          o    IAS 18 paragraph 7 defines revenue as the gross inflow of
               economic benefits during the period arising in the ordinary
               course




                                                                         Page 13


               of business when those inflows result in increases in equity,
               other than increases relating to contributions from equity
               participants.

          o    IAS 16 paragraphs 65 and 66 indicate that any payments of
               compensation received from third parties in respect of
               impairments or losses of property, plant and equipment are
               separate economic events and should be included in determining
               profit or loss when they become receivable.

     The liquidated damages received by BG Group represent contractual
     compensation from a third party for a loss of operating revenue suffered by
     the Group. In accordance with the above standards, once we were satisfied
     that these amounts could be reliably measured and that it was probable that
     the economic benefit would be received; the amounts were recognised as
     revenue.

i), page 112
- ------------

17.  We note that the gain on the deconsolidation of MetroGAS will not be
     recognized for U.S. GAAP until all conditions precedent to the
     restructuring plan are resolved. Tell us what U.S. accounting standard you
     are relying on as the basis for this treatment. We may have further
     comment.

     We performed a detailed review of applicable guidance before arriving at
     our conclusion on the appropriate US GAAP treatment of the gain on
     deconsolidation recognised under IFRS. The conclusion took account of a
     number of standards.

     FAS 94, paragraph 15(d) amends APB Opinion 18 to clarify that the
     limitations it contains on the application of consolidation accounting
     should also be applied as limitations to the use of the equity method. GASA
     and MetroGAS were therefore accounted for using the cost method at 31
     December 2005, pending final regulatory approval of the restructuring. APB
     18, paragraph 19(l) prohibits losses on an investment in an entity which
     ceases to be equity accounted and is carried prospectively under the cost
     method from being reversed. In practice, the same treatment is applied to
     subsidiaries which are deconsolidated. We therefore concluded that the gain
     recognised on deconsolidation under IFRS could not be recognised in income
     under US GAAP as at 31 December 2005.

     We noted also that both FAS 15, paragraph 6 and FAS 140, paragraph 16
     contain similar requirements in respect of gains from troubled debt
     restructurings and extinguishment of financial liabilities, respectively,
     namely that a gain should not be recognised until a debt restructuring is
     consummated or a liability fully extinguished by completion of all
     precedent requirements.

     Based on the above considerations, we concluded that it would not be in
     accordance with US GAAP to recognise the gain in income whilst regulatory
     approval was outstanding and it was therefore deferred as a single item
     within current liabilities at 31 December 2005.

                                      *****





                                                                         Page 14


Pursuant to the Staff's request, we acknowledge that:

     o    we are responsible for the adequacy and accuracy of the disclosure in
          our filings with the Commission;
     o    Staff comments or changes to disclosure in response to Staff comments
          do not foreclose the Commission from taking any action with respect to
          our filings; and
     o    we may not assert Staff comments as a defense in any proceeding
          initiated by the Commission or any person under the federal securities
          laws of the United States.

We understand that the Division of Enforcement has access to all information
provided to the Staff of the Division of Corporation Finance in their review of
our filing or in response to the Staff's comments on our filing.

Please do not hesitate to call our Chris O'Shea with respect to this response on
+44 118 929 3633 or Pamela Gibson of Shearman & Sterling LLP on +44 20 7655
5006.

Yours sincerely,



/s/ Ashley Almanza


Ashley Almanza
Chief Financial Officer
For and on behalf of BG Group plc


cc:  U.S. Securities and Exchange Commission
     Mr. Gary Newberry
     Ms. Shannon Buskirk



                                                                         Page 15


                                   Appendix 1

Extract from BG Group's 2004 20-F (additional information in respect of
question 10)

14   ACQUISITION OF SUBSIDIARY UNDERTAKINGS

The acquisition of BG Canada Exploration and Production, Inc. (formerly El Paso
Oil and Gas Canada, Inc.), which was completed for cash consideration on 24
March 2004, was accounted for under the acquisition method. Details of the
acquisition balance sheet are as follows:




                                                                                Book   Fair value      Fair value
                                                                               value  revaluation  at acquisition
                                                                            (pound)m     (pound)m        (pound)m
- ------------------------------------------------------------------------------------------------------------------
                                                                                                     
Fixed assets
- ------------------------------------------------------------------------------------------------------------------
   Intangible assets(a)                                                            -           74              74
- ------------------------------------------------------------------------------------------------------------------
   Tangible assets                                                               214         (132)             82
- ------------------------------------------------------------------------------------------------------------------
Current assets
- ------------------------------------------------------------------------------------------------------------------
   Stocks                                                                          1            -               1
- ------------------------------------------------------------------------------------------------------------------
   Debtors: amounts falling due within one year                                   15            -              15
- ------------------------------------------------------------------------------------------------------------------
   Debtors: amounts falling due after more than one year                          22            3              25
- ------------------------------------------------------------------------------------------------------------------
   Cash at bank and in hand                                                       10            -              10
- ------------------------------------------------------------------------------------------------------------------
Creditors: amounts falling due within one year                                  (17)            -             (17)
- ------------------------------------------------------------------------------------------------------------------
Provisions for liabilities and charges                                           (1)            -              (1)
==================================================================================================================
Net assets                                                                       244          (55)            189
==================================================================================================================
Fair value of consideration                                                        -            -             189
==================================================================================================================


The adjustments relate primarily to the revaluation of exploration and
production fixed assets to fair value.

The losses of BG Canada Exploration and Production, Inc., prior to the date of
acquisition were as follows:




                                                                                         1 Jan to      Year ended
                                                                                      24 Mar 2004     31 Dec 2003
                                                                                         (pound)m        (pound)m
- ------------------------------------------------------------------------------------------------------------------
                                                                                                        
Loss after taxation                                                                            (2)            (43)
==================================================================================================================


If BG Canada Exploration and Production, Inc. had been acquired at the beginning
of the year, it is estimated that BG Group's consolidated profit on ordinary
activities before taxation would not have been materially different.

In addition, BG Group acquired Mauritania Holdings BV on 31 March 2004, Aventura
Energy, Inc. on 5 May 2004 and other minor entities. All were for cash
consideration, except for (pound)3m relating to Mauritania which was deferred
consideration. These were accounted for under the acquisition method. Details of
the combined balance sheets are as follows:



                                                                                Book   Fair value      Fair value
                                                                               value  revaluation  at acquisition
                                                                            (pound)m     (pound)m        (pound)m
- ------------------------------------------------------------------------------------------------------------------
                                                                                                     
Fixed assets
- ------------------------------------------------------------------------------------------------------------------
   Intangible assets(a)                                                           43          116             159
- ------------------------------------------------------------------------------------------------------------------
   Tangible assets                                                                26          (16)             10
- ------------------------------------------------------------------------------------------------------------------
Current assets
- ------------------------------------------------------------------------------------------------------------------
   Debtors: amounts falling due within one year                                    2            -               2
- ------------------------------------------------------------------------------------------------------------------
   Cash at bank and in hand                                                        2            -               2
- ------------------------------------------------------------------------------------------------------------------
Creditors: amounts falling due within one year                                    (1)           -              (1)
- ------------------------------------------------------------------------------------------------------------------
Provisions for liabilities and charges                                            (5)           4              (1)
==================================================================================================================
Net assets                                                                        67          104             171
==================================================================================================================
Fair value of consideration                                                        -            -             171
==================================================================================================================


The adjustments relate primarily to the revaluation of exploration and
production fixed assets to fair value.

The losses of the combined entities prior to the date of acquisition were as
follows:



                                                                                            Since      Year ended
                                                                                       1 Jan 2004     31 Dec 2003
                                                                                         (pound)m        (pound)m
- ------------------------------------------------------------------------------------------------------------------
                                                                                                          
Loss after taxation                                                                            (1)              -
==================================================================================================================


If the combined entities had been acquired at the beginning of the year, it is
estimated that BG Group's consolidated profit on ordinary activities before
taxation would not have been materially different.

(a) Intangible assets comprise expenditure on unproved gas and oil reserves.