These excerpts taken from the BP 6-K filed May 22, 2008.
Consequences of a lack of quorum
66 If within five minutes from the time appointed for a general meeting (or such longer interval as the chairman of the meeting may think fit to allow) a quorum is not present, the meeting, if convened on the requisition of members, shall be dissolved. In any other case it shall stand adjourned to such other day and such time and place as may have been specified for the purpose in the notice convening the meeting or (if not so specified) as the chairman of the meeting may determine and in the latter case not less than seven days notice of the adjourned meeting shall be given in any manner in which notice of a meeting may lawfully be given for the time being. At the adjourned meeting any two members present in person or by proxy shall be a quorum.