Publication of Prospectus

London Stock Exchange Group PLC
25 September 2007



London Stock Exchange Group plc



25 September 2007



PUBLICATION OF PROSPECTUS



London Stock Exchange Group plc (the 'Company') has today published a Prospectus
approved by the UK Listing Authority relating to the introduction to the
Official List and admission to trading on the London Stock Exchange of up to an
additional 79,568,067 Ordinary Shares in the Company in connection with the
merger between the Company and Borsa Italiana S.p.A. pursuant to a combination
agreement dated 23 June 2007 (the 'Merger').



The publication of the Prospectus follows the announcement by the Company on 8
August 2007 that shareholders had approved the resolutions to implement the
Merger.  The Merger is expected to complete on 1 October 2007 and dealings in
the additional Ordinary Shares issued pursuant to the Merger are expected to
commence on that date.



A copy of the Prospectus will shortly be available for inspection at the
Document Viewing Facility, which is situated at:



Financial Services Authority
25 The North Colonnade
Canary Wharf
London
E14 5HS



Tel. No. (0)20 7066 1000





A copy of the Prospectus is also available on the Company's website at 
http://www.londonstockexchange-ir.com/lse/



This document does not constitute or form part of any offer or invitation to
sell or issue, or any solicitation of any offer to purchase or subscribe for or
purchase any securities in Exchange Group.



Securities may not be offered or sold in the United States unless they are
registered under the United States Securities Act of 1933, as amended (the
''Securities Act''), or are exempt from such registration requirements. The
Ordinary Shares have not been, and will not be, registered under the Securities
Act. The relevant clearances have not been, and will not be, obtained from the
Securities Commission of any province or territory of Canada; no prospectus in
relation to the Admission of the Ordinary Shares has been, or will be, lodged
with, or registered by The Australian Securities and Investments Commission; and
no registration statement has been, or will be, filed with the Japanese Ministry
of Finance in relation to the Admission of the Ordinary Shares. Accordingly,
subject to certain exceptions, the Ordinary Shares may not, directly or
indirectly, be offered or sold within Canada, Australia or Japan or offered or
sold to a resident of Canada, Australia or Japan.



Further information is available from:



London Stock Exchange
Patrick Humphris - Media                       [phone]
Paul Froud - Investor Relations                [phone]





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            The company news service from the London Stock Exchange        ISEFFIISWSEIU