UK Stocks-Factors to watch on Nov 23

Britain's FTSE 100 index is seen opening 20 points higher at 6,981 on Friday, according to financial bookmakers. * BP: BP has started production at the Clair Ridge oil field in the West of Shetlands region of the North Sea, targeting a peak output of 120,000 barrels per day, it said on Friday. * FLYBE: Britain's Virgin Atlantic Airways is in talks to acquire regional airline Flybe Group Plc, Sky News reported on Thursday, a week after Flybe said it was in talks t