Transaction in Own Shares

BP PLC
21 July 2005


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 21 July 2005

BP p.l.c. announces that on 20 July 2005, it purchased 11,500,000 ordinary
shares at prices between 620.00 pence and 635.00 pence per share. The purchased
shares will all be held as Treasury shares.

Following the above purchase, BP p.l.c. holds 414,485,724 ordinary shares in
Treasury, and has 21,086,483,587 ordinary shares in issue (excluding Treasury
shares).

Enquiries: Fergus MacLeod, BP p.l.c. Tel : [phone]



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