Announcement of exercise of over-allotment option

NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION, DIRECTLY OR INDIRECTLY, IN OR INTO, THE UNITED STATES OF AMERICA, AUSTRALIA, CANADA OR JAPAN

FOR IMMEDIATE RELEASE 28 October 2010

Betfair Group plc

Announcement of exercise of over-allotment option

Betfair Group plc (the "Company") announces that, in connection with the initial public offering of ordinary shares in the Company (the "Offer"), Morgan Stanley Securities Limited., as stabilising manager, exercised the overallotment option (the "Over-allotment Option") provided by each of Andrew Black, Jane Black, The Madeleine Jane Black Bare Trust, The Dora Elizabeth Black Bare Trust, The Edgar Anthony Wilson Black Bare Trust, The Oliver James Patrick Black Bare Trust, Balderton Capital I, L.P., Charlton Acquisition LLP, Edward Wray Settlement 2008, Index Venture Management SA, Index Venture 1 Parallel Entrepreneur Fund (Jersey) LP, Index Ventures 1 GmbH & Co KG, Index Ventures 1 (Jersey) LP, Index Ventures 1 (Delaware) LP, Index Venture Associates 1 Limited, J.P. Morgan Partners (BHCA), L.P., Momentum Limited and UBS Capital (Jersey) LTD Company (the "Core Selling Shareholders"), in respect of a total of 1,750,322 ordinary shares in the Company (the "Over-allotment Shares") on 27 October 2010. The proceeds of approximately £22.8 million (before deduction of underwriting commissions and expenses) arising from the exercise of the over-allotment arrangements will be received by the relevant Core Selling Shareholders. Following exercise of the Over-allotment Option, the total size of the Offer is £233.7 million (17,977,784 ordinary shares). Following exercise of the Over-allotment Option 49,256,353 ordinary shares in the Company will be held in public hands, representing a free float of approximately 46.1 per cent. of the issued share capital of the Company.

ENQUIRIES

For further information contact:

Betfair

Goldman Sachs International

Morgan Stanley & Co. International plc

Powerscourt

Disclaimer

Neither this announcement nor the information contained herein, may be made or transmitted into the United States of America (including its territories or possessions, any state of the United States of America and the District of Columbia) ("the United States"). Neither this announcement, nor the information contained herein may be taken, transmitted or distributed, directly or indirectly, into Australia, Canada or Japan or to any persons in any of those jurisdictions or any other excluded territories. Any failure to comply with this restriction may constitute a violation of United States, Australian, Canadian or Japanese securities law. The distribution of this announcement in other jurisdictions may be restricted by law and persons into whose possession this announcement comes should inform themselves about, and observe, any such restrictions. The securities referred to herein have not been and will not be registered under the applicable securities laws of the United States, Canada, Australia or Japan and, subject to certain exceptions, may not be offered or sold within the United States, Canada, Australia or Japan or to any national, resident or citizen of Canada, Australia or Japan.

This announcement does not constitute or form part of any offer or invitation to sell, or any solicitation of any offer to purchase or subscribe for any Shares or any other securities nor shall it (or any part of it) or the fact of its distribution, form the basis of, or be relied on in connection with, any contract therefore. The Offer and the distribution of this announcement and other information in connection with the listing and Offer in certain jurisdictions may be restricted by law and persons into whose possession any document or other information referred to herein comes should inform themselves about, and observe, any such restrictions. Any failure to comply with these restrictions may constitute a violation of the securities laws of any such jurisdiction.

In particular, this announcement does not constitute an offer for sale of, or a solicitation to purchase or subscribe for, any securities in the United States. No securities of the Group have been, or will be, registered under the US Securities Act of 1933, as amended, and securities of Betfair may not be offered or sold in the United States absent registration or an applicable exemption from, or in a transaction not subject to, the registration requirements of the US Securities Act of 1933, as amended.

This announcement does not constitute a recommendation concerning the Offer. The price and value of securities can go down as well as up. Past performance is not a guide to future performance. Information in this announcement or any of the documents relating to the Offer cannot be relied upon as a guide to future performance. Potential investors should consult a professional advisor as to the suitability of the Offer for the entity concerned.

Goldman Sachs International, Morgan Stanley & Co. International plc, Morgan Stanley Securities, Barclays Capital and Numis, each of which is authorised and regulated in the UK by the Financial Services Authority, are acting exclusively for Betfair and no one else in connection with the Offer and will not regard any other person as its client in relation to the Offer and will not be responsible to anyone other than Betfair for providing the protections afforded to their respective clients nor for giving advice in relation to the Offer the contents of this announcement or any transaction, arrangement or other matter referred to herein.

In connection with the Offer, Goldman Sachs International, Morgan Stanley & Co. International plc, Morgan Stanley Securities, Barclays Capital, or Numis or any of their respective affiliates, acting as investors for their own accounts, may subscribe for or purchase Shares and in that capacity may retain, purchase, sell, offer to sell or otherwise deal for their own accounts in such Shares and other securities of Betfair or related investments in connection with the Offer or otherwise. Accordingly, references in the Prospectus, once published, to the Shares being issued, offered, subscribed, acquired, placed or otherwise dealt in should be read as including any issue or offer to, or subscription, acquisition, placing or dealing by, Goldman Sachs International, Morgan Stanley & Co. International plc, Morgan Stanley Securities, Barclays Capital and Numis or any of their respective affiliates acting as investors for their own accounts. Goldman Sachs International, Morgan Stanley & Co. International plc, Morgan Stanley Securities, Barclays Capital and Numis do not intend to disclose the extent of any such investment or transactions otherwise than in accordance with any legal or regulatory obligations to do so. None of Goldman Sachs International, Morgan Stanley & Co. International plc, Morgan Stanley Securities, Barclays Capital, or Numis or any of their respective subsidiary undertakings, affiliates or any of their respective directors, officers, employees, advisers, agents or any other person accepts any responsibility or liability whatsoever for, or makes any representation or warranty, express or implied, as to the truth, accuracy, completeness or fairness of the information or opinions in this announcement (or whether any information has been omitted from the announcement) or any other information relating to the Company, its subsidiaries or associated companies, whether written, oral or in a visual or electronic form, and howsoever transmitted or made available or for any loss howsoever arising from any use of this announcement or its contents or otherwise arising in connection therewith.

Unless otherwise defined, terms used in this announcement have the meaning given to them in the announcement of the Company's intention to list published on 21 September 2010.