UK Stocks-Factors to watch on May 16

May 16 (Reuters) - Britain's FTSE 100 index is seen opening up 8 points at 7,731 on Wednesday, according to financial bookmakers. * LONMIN: Britain's Competition and Markets Authority said it will examine whether a takeover of Lonmin by South Africa's Sibanye-Stillwater would reduce competition, knocking shares in both mining firms. * PADDY POWER BETFAIR: British bookmaker Paddy Power Betfair Plc is close to buying U.S. daily fantasy sports company FanDuel, according to a report o