Transaction in Own Shares

Centrica PLC
21 September 2005


Centrica plc

Repurchase of shares

Centrica plc announces that on 21 September 2005 it purchased for cancellation
2,200,000 of its ordinary shares at a price of 248.8950p 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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