UK Stocks-Factors to watch on Jan. 21

Jan 21 (Reuters) - Britain's FTSE 100 index is seen opening up 60 to 82 points, or as much as 1.5 percent, according to financial bookmakers. For more on the factors affecting European stocks, please click on * The UK blue chip index ended 3.5 percent lower at 5,673.58 points on Wednesday, after earlier touching its lowest level in more than three years, as concerns about China triggered a sharp decline in commodities-related stocks. The index has fallen more than 20 percent since its