UK Stocks-Factors to watch on Aug 10

Aug 10 (Reuters) - Britain's FTSE 100 index is seen opening down 45 points on Thursday, according to financial spreadbetters. * BP: Australia's antitrust regulator said on Thursday it was concerned BP Plc's plan to buy the petrol stations of grocery giant Woolworths Ltd would hurt competition, a sign it may block the A$1.8 billion ($1.4 billion) deal. * SKY: Hedge fund manager Crispin Odey has said he is considering withdrawing his support for Twenty-First Century Fox's attempt