BP has lost about 35 per cent of its share value, around $60bn, since its Deepwater Horizon well blew up in the Gulf of Mexico, causing a massive oil spill.<br /><br />A criminal investigation has been launched into the cause of April's accident and the British energy giant's plunging share price could make it a takeover target for one of its rivals.<br /><br />Jonah Hull reports from London.
