Holding(s) in Company

Centrica PLC
                  

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TR-1: Notifications of Major Interests in Shares
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1. Identity of the issuer or the underlying issuer of   Centrica plc
 existing 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           INVESCO plc
 notification obligation:
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4. Full name of shareholder(s) (if different
 from 3):
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5. Date of transaction (and date on which the  9 July 2007
 threshold is crossed or reached if
 different):
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6. Date on which issuer notified:              10 July 2007
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7. Threshold(s) that is/are crossed or
 reached:                                      5%,4%
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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 use   --------------------------- -------------------------------------------------------
 ISIN code        Number of     Number of     Number of     Number of voting      Percentage of
                   shares        voting        shares        rights                voting rights
                                 rights                     --------------------- -------------------
                                                            Direct  Indirect      Direct  Indirect
----------------- ------------- ------------- ------------- ------- ------------- ------- -----------
    Ordinary
6 14/81p Shares
  (GB00B033F229)   215,793,163   215,793,163   182,833,192           182,833,192             4.97%
----------------- ------------- ------------- ------------- ------- ------------- ------- -----------
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B: Financial Instruments
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Resulting situation after the triggering transaction
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Type of financialExpiration date  Exercise/        No. of voting rights Percentage of
 instrument                        conversion       that may be acquired voting rights
                                   period/date      (if the instrument
                                                    exercised/converted)
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Total (A+B)
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Number of voting rights                      Percentage of voting rights
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182,833,192                                  4.97%
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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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Bank of Ireland (Dublin) - 2,249,777

Bank of New York - 177,701

Banque Paribas - 647,802

Bank of New York (Brussels) - 97,017

Bank of New York (Singapore) - 61,000

Chase Bank (Hong Kong) - 236,096

JP Morgan Chase - 3,205,421

Citibank - 148,744,982

Erste Bank (Vienna) - 8,816

HSBC Bank Plc (London) - 2,850,313

Japan Trustee Services Bank - 3,506

Mellon Bank, Pittsburgh - 1,216,500

SCHI (Santander Central Hispano Investment) - 28,139

State Street (Sydney) - 10,000

State Street Trust & Banking Co (London) - 21,050,242

Trust & Custody Servs JP - 9,972

Northern Trust Company (London) - 2,232,375

Other - 3,533
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Proxy Voting:
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10. Name of proxy holder:
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11. Number of voting rights proxy holder will
 cease to hold:
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12. Date on which proxy holder will cease to
 hold voting rights:
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13. Additional information:
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14 Contact name:                             Robin Healy
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15. Contact telephone number:                01753 494 017
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For notes on how to complete form TR-1 please see the FSA website.