Regulatory News Announcement

RNS Number:0517Y
O2 PLC
07 February 2006


                              O2 plc (the Company)

                            CANCELLATION OF LISTING


On 23 January 2006, Telefonica S.A. announced that all of the conditions of its
recommended offer for the whole of the issued and to be issued share capital of
the Company (the Offer) had been satisfied or waived and, accordingly, the Offer
was declared unconditional in all respects.

As at 6.00 a.m. (London time) on 23 January 2006, Telefonica S.A. owned or had
received acceptances representing 76.51 per cent. of the Company's existing
issued share capital. In accordance with the terms of the Offer document which
was posted to the Company's shareholders on 21 November 2005, the Company now
intends to apply to the Financial Services Authority for the cancellation of the
listing of its shares on the Official List and to the London Stock Exchange for
the cancellation of the admission to trading of its shares on the London Stock
Exchange's market for listed securities. It is anticipated that the cancellation
of the Company's listing and admission to trading will take effect on 7 March
2006, being not less than 20 business days after Telefonica acquired or agreed
to acquire 75 per cent. of the voting rights attaching to the O2 shares.

                                                                 7 February 2006

ENQUIRIES

For further information contact:

O2 contacts
Richard Poston                          David Nicholas
Director Corporate Affairs              Director of Communications
O2                                      O2
richard.poston@o2.com                   david.nicholas@o2.com
Tel: +44 (0) 771 537 7079               Tel: +44 (0) 771 575 9176

David Boyd                              John Crosse
Head of Investor Relations              Investor Relations Manager
O2 plc                                  O2 plc
david.boyd@O2.com                       john.crosse@O2.com
t: +44 (0)1753 628230                   t: +44 (0)1753 628198

     All O2 Group news releases can be accessed at our web site: www.o2.com


                      This information is provided by RNS
            The company news service from the London Stock Exchange

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