Transaction in Own Shares

PURCHASE OF OWN SHARES                             


2 May 2012

The Company announces the buyback of 75,000 ordinary shares to be held in
treasury at a price of 552.50 pence per share. The issued share capital of the
Company following these buybacks will be:

Ordinary shares - 43,841,312 including 2,267,065 shares held in Treasury

Ordinary shares - 41,574,247 excluding 2,267,065 shares held in Treasury

Convertible bonds - $ 79,948,000

The above figure of ordinary shares less treasury shares in issue of 41,574,247
may be used by shareholders as the denominator for the calculations by which
they will determine if they are required to notify their interest in, or a
change to their interest in the Company under the FSA's Disclosure and
Transparency Rules.

Enquiries
Barbara Powley
Company Secretary
0207 743 5610