Transaction in Own Shares

Centrica PLC
21 December 2004

Centrica plc



Repurchase of shares



Centrica plc announces that on 21 December 2004 it purchased for cancellation
3,000,000 of its ordinary shares at a price of 226.7646p per share from Morgan
Stanley & Co. International Limited.





Enquiries



Kath Kyle            Centrica plc                                   01753 494902



Jon Bathard-Smith    Morgan Stanley & Co. International Limited    020 7425 8000


                      This information is provided by RNS
            The company news service from the London Stock Exchange