UK Stocks-Factors to watch on Nov. 18

Nov 18 (Reuters) - Britain's FTSE 100 index is seen opening up 2 points on Friday, according to financial bookmakers. * The UK blue chip index closed 0.7 percent higher on Thursday, helped by gains among mining firms. * RIO TINTO: The government of Guinea has called on Rio Tinto to spell out what exactly it has discovered in an internal investigation into payments made to an adviser in Guinea who helped it secure ownership of the Simandou project. * GKN: British engineer GKN