Transaction in Own Shares

Centrica PLC
20 September 2005


Centrica plc

Repurchase of shares

Centrica plc announces that on 20 September 2005 it purchased for cancellation
2,000,000 of its ordinary shares at a price of 251.2200p 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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