UK Stocks-Factors to watch on Sept 19

Sept 19 (Reuters) - Britain's FTSE 100 index is seen opening 7 points higher at 7,260.4 on Tuesday, according to financial bookmakers. * RBS: European Union regulators approved a British plan allowing bailed-out Royal Bank of Scotland to support smaller alternative banks with funds totalling around 835 million pounds ($1.1 billion) to encourage competition. * RYANAIR: Ryanair Chief Executive Michael O'Leary said he was sure a series of flight cancellations would not help future