Transaction in Own Shares

BP PLC
20 July 2006

BP p.l.c.  -  Transaction in Own Shares
BP p.l.c.  -  20 July 2006

BP p.l.c. announces that on 19 July 2006, it purchased 5,948,375 ordinary shares
at prices between 626.0 pence and 634.5 pence per share and between 1154.17
cents and 1157.50 cents per share. The purchased shares will all be held as
Treasury shares.

BP p.l.c. also announces that on 19 July 2006 it transferred to participants in
its employee share schemes 16,036 ordinary shares at prices between 350.00 pence
and 511.0 pence. These shares were previously held as treasury shares.

Following the above transactions, BP p.l.c. holds 1,799,389,615 ordinary shares
in Treasury, and has 19,896,622,278 ordinary shares in issue (excluding Treasury
shares).


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




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