Transaction in Own Shares

London Stock Exchange Group PLC
18 August 2006

                        London Stock Exchange Group plc



London Stock Exchange announces that on 18 August 2006 it acquired 100,000 of
its own ordinary shares of 6 79/86p each for cancellation at an average price of
1139.1503 pence per share.

Further information is available from:


London Stock Exchange       John Wallace - Media                   020 7797 1222
                            Paul Froud - Investor Relations        020 7797 3322






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