Transaction in Own Shares

BP PLC
20 October 2005

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

BP p.l.c. announces that on 19 October 2005, it purchased 7,400,000 ordinary
shares at prices between 607.50 pence and 613.00 pence per share. The purchased
shares will all be held as Treasury shares.

BP p.l.c. also announces that on 19 October 2005 it transferred to participants
in its employee share schemes 76,047 ordinary shares at prices between 452.00
pence and 511.00 pence. These shares were previously held as treasury shares.

Following the above transactions, BP p.l.c. holds 726,790,434 ordinary shares in
Treasury, and has 20,909,726,494 ordinary shares in issue (excluding Treasury
shares).

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


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