Transaction in Own Shares

BP PLC
20 July 2005


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 20 July 2005

BP p.l.c. announces that on 19 July 2005, it purchased 5,640,000 ordinary shares
at prices between 627.00 pence and 631.00 pence per share. The purchased shares
will all be held as Treasury shares.

Following the above purchase, BP p.l.c. holds 402,985,724 ordinary shares in
Treasury, and has 21,097,949,147 ordinary shares in issue (excluding Treasury
shares).

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



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