Additional Listing

Centrica PLC
24 March 2006



                                  Centrica plc

                              --------------------



Application has been made to the Financial Services Authority and the London
Stock Exchange Plc for a total of 10,000,000 ordinary shares of

6 14/81 pence each ('shares') to be admitted to the Official List.



It is expected that admission will be granted on 29 March 2006 and that trading
will commence 30 March 2006.



These shares are being reserved under a block listing and will be issued as a
result of the award of share pursuant to the following scheme:


            Schemes                                                Shares
Centrica Executive Share Option Scheme                           10,000,000



When issued, these shares will rank pari passu with the existing ordinary
shares.


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