UK Stocks-Factors to watch on Sept 19

Britain's FTSE 100 index is seen opening 14 points lower at 7,300 on Thursday, according to financial bookmakers. * BP: BP Plc began a planned overhaul on Wednesday of the small gasoline-producing fluidic catalytic cracking unit (FCCU) at its 430,000 barrel-per-day (bpd) Whiting, Indiana, refinery, said sources familiar with plant operations. * GSK: An independent expert panel to the U.S. Food and Drug Administration on Wednesday recommended approval of Glaxo