Transaction in Own Shares

London Stock Exchange Group PLC
19 February 2007


                        London Stock Exchange Group plc


London Stock Exchange announces that on 19 February 2007 it acquired 163,879 of
its own ordinary shares of 6 79/86p each for cancellation at an average price of
1302.1972 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