Transaction in Own Shares

Centrica PLC
17 August 2005


Centrica plc

Repurchase of shares

Centrica plc announces that on 17 August 2005 it purchased for cancellation
1,400,000 of its ordinary shares at a price of 236.7900p per share from Hoare
Govett's affiliate, ABN AMRO Bank N.V. London Branch.

Enquiries
Kath Kyle             Centrica plc                             01753 494902
Jeremy Thompson       ABN AMRO Bank N.V. London Branch         020 7678 8000




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