Transaction in Own Shares

London Stock Exchange Group PLC
21 February 2007

                        London Stock Exchange Group plc



London Stock Exchange announces that on 21 February 2007 it acquired 300,000 of
its own ordinary shares of 6 79/86p each for cancellation at a price of
1300.7298 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