UK Stocks-Factors to watch on Sept. 22

Sept 22 (Reuters) - Britain's FTSE 100 index is seen opening up 35 to 44 points higher, or up as much as 0.6 percent on Thursday, according to financial bookmakers. * The UK blue chip index closed up 0.1 percent at 6,834.77 points on Wednesday, buoyed by its banks after the Bank of Japan's overhaul of its monetary policy framework boosted financial stocks around the world. * PETROFAC: British oil and gas industry services company Petrofac Ltd has told Tunisia's government it has