Completion of Merger

London Stock Exchange Group PLC
01 October 2007



London Stock Exchange Group plc


1 October 2007


Further to the Company's announcement of 25 September 2007, the Company
announces that its merger with Borsa Italiana S.p.A. (the 'Merger') has been
completed today.


In accordance with the terms of the Merger (as described in the circular to
shareholders dated 23 July 2007), the Company has issued 79,449,753 ordinary
shares of 6 79/86p each in the capital of the Company (the 'New Ordinary 
Shares'). Admission of the New Ordinary Shares to the Official List of the UK
Listing Authority and to trading on the Main Market of the London Stock Exchange
will take place at 8.00am UK time on 1 October 2007.


London Stock Exchange     Patrick Humphris - Media                 020 7797 1222
                          Paul Froud - Investor Relations          020 7797 3322


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