UK Stocks-Factors to watch on Feb 21

Britain's FTSE 100 index is seen opening up 7 points on Thursday, according to financial bookmakers. * GLENCORE: Glencore on Wednesday said it would "vigorously contest" a $680 million tax demand from the British authorities linked to transfer pricing. * STANDARD CHARTERED: Standard Chartered Plc said on Wednesday Britain's financial watchdog had imposed a fine of 102.2 million pounds ($133.34 million) in relation to its investigation into the bank's historical fi