The world's biggest mining company, BHP Billiton, lost 9½p to 740p after delivering a knockout blow to win control of Aussie miner WMC Resources. The higher offer sees BHP pull the rug from under Swiss-based mining outfit Xstrata, up 21p at 1061p, which was offering almost £3.5bn. City speculators say Xstrata may now turn its sights on Lonmin, up 1½p at 1037½p.