UK Stocks-Factors to watch on Oct 28

Oct 28 (Reuters) - Britain's FTSE 100 index is seen opening 11 to 13 points lower, or down as much as 0.2 percent on Friday, according to financial bookmakers. * The UK blue chip index was up 0.4 percent at 6,986.57 at close on Thursday, buoyed by well-received results from Barclays, though mid-cap stocks fell as earnings updates led to double-digit slides for AMEC Foster Wheeler and Berendsen. * ANGLO AMERICAN: Miner Anglo American has pleaded guilty in an Australian court to char