Markets | Thu Jan 24, 2013 7:57am GMT

UPDATE 1-UK Stocks-Factors to watch on Thursday Jan 24

LONDON Jan 24 (Reuters) - Britain's FTSE 100 index is seen opening 4 to 5 points lower, or down 0.1 percent on Thursday, according to financial bookmakers, tracking falls in Asia as disappointing results from U.S. tech giant Apple eclipsed data showing accelerating growth in China's factory sector.