BP’s profits have slumped and the energy giant has stopped buying back its shares – but the bigger question is what this means for the future of Britain’s most famous oil company, says James Moore E nergy giant BP has released its latest results – and, thanks to a downturn in oil prices, annual profits are down 16 per cent. As its shares head south , perhaps it’s time to ask a question: for how much longer will this one-time titan of British business be able to retain its lofty position? BP,