UK Stocks-Factors to watch on July 7

July 7 (Reuters) - Britain's FTSE 100 index is seen opening up by 66-72 points, or 1-1.1 percent, on Thursday, according to spreadbetters at CMC and IG. * The UK blue chip index closed down 1.3 percent on Wednesday led lower by retail and property-related stocks, which extended losses made after Britons voted to leave the European Union, and by a decline in energy stocks as oil prices slipped. * BARCLAYS: The U.S. Commodity Futures Trading Commission ordered Barclays Plc to pay $5