Share repurchase programme

London Stock Exchange Group PLC
28 September 2007

London Stock Exchange Group plc

28 September 2007

London Stock Exchange Group plc - Irrevocable, Non-discretionary Share
Repurchase Programme

London Stock Exchange Group plc (the 'Company') announces that it has
recommenced a non-discretionary programme to purchase ordinary shares for
cancellation, during the Company's close period commencing on 1 October 2007 and
ending with the announcement of its Interim Results.

The buyback programme is part of the Company's active ongoing capital management
policy and will be managed by the Company's brokers, JPMorgan Cazenove and
Lehman Brothers, who are independent third parties that make trading decisions
independently of, and uninfluenced by, the Company.

Any acquisitions will be effected within certain pre-set parameters, and in
accordance with both the Company's general authority to repurchase shares and
Chapter 12 of the Listing Rules which requires that the maximum price paid be
limited to no more than 5 per cent above the average market value for the shares
as derived from the London Stock Exchange Daily Official List for the five
business days immediately prior to such purchase.


Further information is available from:


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

JPMorgan Cazenove                  Christopher Smith                            020 7588 2828

Lehman Brothers                    Stephen Pull                                 020 7102 1000




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