UK Stocks-Factors to watch on Sept 19

Sept 19 - Britain's FTSE 100 index is seen opening 11 points higher at 7,312 on Wednesday, according to financial bookmakers. * TESCO: Tesco, Britain's biggest supermarket group, will go head to head with German rivals Aldi and Lidl on Wednesday by launching its own discount store format. * GSK: Nestle, Unilever, and Coca-Cola are among bidders for GlaxoSmithKline's Indian Horlicks nutrition business, expected to fetch more than $4 billion, four people familiar with the m