Holding(s) in Company

Centrica PLC
                  

TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES

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1. Identity of the issuer or the underlying issuer of existing                 Centrica plc
 shares to which voting rights are attached:
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2. Reason for notification (yes/no)
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An acquisition or disposal of voting rights                                                Yes
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An acquisition or disposal of financial instruments which may result in the acquisition of
 shares already issued 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 notification              AXA S.A., 25 Avenue Matignon, 75008
 obligation:                                                         Paris and its group 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                28 August 2008
 crossed or reached if different):
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6. Date on which issuer notified:                                             29 August 2008
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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 to the  Resulting situation after the triggering transaction
 shares          Triggering transaction
if possible     -------------------------- --------------------------------------------------------------
 using the ISIN Number of    Number of     Number of    Number of voting rights   % of voting rights
 CODE            Shares       Voting        shares
                              Rights       ------------ ------------------------- -----------------------
             1.           1.            1. Direct       Direct       Indirect     Direct     Indirect
--------------- ------------ ------------- ------------ ------------ ------------ ---------- ------------
B033F22         181,866,437  181,866,437   76,402,685   76,402,685   109,306,365  2.06       2.95
--------------- ------------ ------------- ------------ ------------ ------------ ---------- ------------
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 rights    % of voting
 instrument          date           Period/ Date              that may be acquired if    rights
                                                              the instrument is
                                                              exercised/ converted.
------------------- -------------- ------------------------- -------------------------- -----------------
N/A                 N/A            N/A                       N/A                        N/A
------------------- -------------- ------------------------- -------------------------- -----------------
Total (A+B)
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Number of voting rights                           % of voting rights
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                                      185,709,050                                                   5.01%
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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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Name of Company/ Fund                                  Number of      % of issued
                                                        Shares         share capital
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Alliance Capital Management                            1,929,600.00   0.05201
Direct
AXA                                                    7,484,831.00   0.20175
Direct
AXA Colonia Konzern                                    164,704.00     0.00444
Direct
AXA Colonia Konzern                                    254,738.00     0.00687
Indirect
AXA Financial, Inc                                     35,180,122.00  0.948258622
Indirect
AXA Framlington                                        4,069,114.00   0.11
Indirect
AXA France                                             86,782.00      0.002339156
Indirect
AXA IM UK                                              48,920,609.00  1.318625026
Direct
AXA IM UK                                              6,433,722.00   0.173417032
Indirect
AXA Rosenberg                                          6,072,076.00   0.163669086
Direct
AXA Rosenberg                                          63,281,887.00  1.70572447
Indirect
AXA Winterthur                                         11,830865.00   0.318893713
Direct

                                 Total Direct          76,402,685     2.05939
                                 Total Indirect        109,306,365    2.94629
                                 Total                 185,709,050    5.00567
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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:
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14. Contact name:                                      Paul Moore
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15. Contact telephone number:                         01753 494012
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