UPDATE 1-FTSE edges up after Yellen, US data; RBS slumps
February 27, 2014 at 12:01 PM EST
LONDON, Feb 27 (Reuters) - Britain's top share index edged up on Thursday, lifted by positive U.S. data and assurances from Fed chair Janet Yellen, despite a sharp sell-off in Royal Bank of Scotland and increasing tension over Ukraine.
