Transaction in Own Shares

London Stock Exchange Group PLC
10 May 2007

                        London Stock Exchange Group plc


London Stock Exchange announces that on 10 May 2007 it acquired 115,000 of its
own ordinary shares of 6 79/86p each for cancellation at a price of 1282.6213
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