UK Stocks-Factors to watch on Feb 13

Britain's FTSE 100 index is seen opening 33 points higher at 7,166 on Wednesday, according to financial bookmakers. * GSK: Mylan NV on Tuesday priced its generic version of GlaxoSmithKline's blockbuster asthma treatment Advair 70 percent lower than the branded medicine. * GOLD: Gold firmed slightly on Wednesday as investors held onto the safe-haven metal while seeking more clarity on Sino-U.S. trade talks, and as volatility in the dollar provided further supp