Holding(s) in Company

Centrica PLC
                  

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TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES
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1. Identity of the issuer or the underlying issuer
of existing shares to which voting rights are         Centrica plc
attached:
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2 Reason for the notification (please tick the appropriate box or boxes):
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An acquisition or disposal of voting rights                                                     X
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An acquisition or disposal of financial instruments which may result in the
acquisition of shares already issues to which voting rights are attached
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An event changing the breakdown of voting rights
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Other (please
 specify):
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3. Full name of person(s) subject to the         AXA S.A., 25 Avenue Matignon, 75008 Paris and its group
notification obligation:                                                                    of companies
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4. Full name of shareholder(s) (if different
from 3.):
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5. Date of the transaction and date on
which the threshold is crossed or
reached:                                         30/07/2007
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6. Date on which issuer notified:                31/07/2007
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7. Threshold(s) that is/are crossed or
reached:                                         5%
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8. Notified details:
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A: Voting rights attached to shares
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Class/type of      Situation previous      Resulting situation after the triggering transaction
shares             to the Triggering
                   transaction
if possible using  -------------------------------------------------------------------------------------
the ISIN CODE      Number      Number      Number      Number of voting           % of voting rights
                   of          of          of shares   rights
                   Shares      Voting      -------------------------------------------------------------
                               Rights      Direct      Direct    Indirect         Direct    Indirect
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Ordinary 6 14/81p

GB00B033F229        185,531,520 185,531,520  78,851,819  78,851,819    100,555,890      2.14        2.73
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B: Financial Instruments
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Resulting situation after the triggering transaction
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Type of financial       Expiration  Exercise/ Conversion  Number of voting        % of voting
instrument              date         Period/ Date         rights that may be      rights
                                                          acquired if the
                                                          instrument is
                                                          exercised/ converted.
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N/A                     N/A         N/A                   N/A                     N/A
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Total (A+B)
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Number of voting rights                            % of voting rights
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179,407,709                                        4.88
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9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable:
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AXA Ireland Pension Fund - Indirect                                       38,000
AXA Sun Life plc - Direct                                                 1,845,873
AXA Rosenberg - Direct                                                    2,545,299
AXA General Insurance Ltd - Direct                                        30,800
Sun Life Unit Assurance Ltd A/c X - Direct                                11,502,000
Sun Life Unit Assurance Ltd A/c X - Direct                                22,842,486
AXA UK Investment Co ICVC Global Distribution Fund - Indirect             124,000
AXA UK Investment Co ICVC Global Growth Fund - Indirect                   394,000
AXA UK Investment Co ICVC Distribution Fund - Indirect                    750,000
AXA UK Investment Co ICVC UK Equity Income Fund - Indirect                6,500,000
AXA UK Investment Co ICVC UK Growth Fund - Indirect                       405,000
PPP Healthcare Group plc - Indirect                                       213,500
Sun Life Pensions Management Ltd - Direct                                 250,000
Sun Life Pensions Management Ltd - Direct                                 500,000
Sun Life Pensions Management Ltd A/c - Direct                             1,800,000
Sun Life Assurance Society Plc - Direct                                   975,000
AXA Rosenburg - Direct                                                    2,056,701
AXA Insurance UK - Direct                                                 992,000
AXA UK Group Pension Scheme - Indirect                                    1,200,000
AXA General Unit Trust - Indirect                                         1,295,000
AXA Financial, Inc - Indirect                                             46,076,955
AXA Colonia Konzern - Direct                                              152,000
AXA Colonia Konzern - Indirect                                            17,298
Sun Life International (IOM) Ltd - Direct                                 2,000,000
AXA France - Indirect                                                     1,087,983
AXA Australia - Indirect                                                  174,439
AXA Rosenburg - Indirect                                                  40,751,190
AXA Financial, Inc* - Indirect                                            457,580
Sun Life Pensions Management Ltd - Direct                                 404,461
Sun Life Pensions Management Ltd - Direct                                 64,450
Sun Life Unit Assurance Ltd LTAV UK Equity - Direct                       921,016
Sun Life Unit Assurance Ltd FTSE All Share Tracker - Direct               643,903
Sun Life Pensions Management LTAV UK Equity - Direct                      4,175,322
Sun Life Pensions Management FTSE All Share Tracker - Direct              3,307,809
AXA Framlington St James Place Exempt (Pens) Fund - Indirect              536,000
AXA St James Place Net (Life) Fund - Indirect                             599,000
AXA Framlington St James Place Offshore Fund - Indirect                   140,000
Framlington onshore private clients - Indirect                            9,445
AXA Winterthur - Direct                                                   12,512,359
ASL With Profit Tranition Fund                                            4,692,593
SLAS With Profit Transition                                               4,424,247
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Proxy Voting:
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10. Name of the proxy holder:                                    N/A
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11. Number of voting rights proxy holder will cease
to hold:                                                         N/A
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12. Date on which proxy holder will cease to hold
voting rights:                                                   N/A
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 13. Additional information:                       N/A
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14. Contact name:                                  Robin Healy
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15. Contact telephone number:                      01753 494 017
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