Transaction in Own Shares

TO:      Regulatory Information Service                                        
                                                                               
         PR Newswire                                                           
                                                                               
RE:      PARAGRAPH 12.6.4 OF THE LISTING RULES                                 

Diageo plc - Transaction in Own Shares

Diageo plc (the "Company") announces that on 12 May 2010, it released from
treasury 651 ordinary shares of 28101/108 pence each ("Ordinary Shares"), to
satisfy grants made under employee share plans. The average price at which
these Ordinary Shares were released from treasury was 976.71 pence per share.

Following this release, the Company holds 248,682,435 Ordinary Shares as
treasury shares and the total number of Ordinary Shares in issue (excluding
shares held as treasury shares) is 2,505,264,370.

13 May 2010