UK Stocks-Factors to watch on Sept 14

Sept 14 (Reuters) - Britain's FTSE 100 index is expected to open 6 points higher at 7,385 on Thursday, according to financial bookmakers. * GLAXOSMITHKLINE: A U.S. Food and Drug Administration advisory panel on Wednesday voted 11-0 that the safety and efficacy of GlaxoSmithKline's shingles vaccine warrants approval for its use in adults aged 50 and over. * LONDON STOCK EXCHANGE: London Stock Exchange Group (LSE) has agreed to buy an additional stake of up to 6.8 percent in its