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                                                      Yes
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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                                         Barclays Global Investors
notification obligation:
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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                                                          8 November 2007
reached:
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6. Date on which issuer notified:                                                         12 November 2007
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7. Threshold(s) that is/are crossed or                                               not reportable% to 3%
reached:
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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  109,817,428 109,817,428  110,780,253      0        110,780,253     0.00        3.01

GB00B033F229
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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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110,780,253                                         3.01
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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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Barclays Global Fund Advisors
Barclays Global Investors Ltd
Barclays Global Investors, N.A
Indexchange Investment AG.
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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:                                   Helen Barker
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15. Contact telephone number:                       01753 494 009
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