UK Stocks-Factors to watch on April 11

April 11 (Reuters) - Britain's FTSE 100 index is seen opening down 9-14 points, or 0.2 percent, on Monday, according to financial bookmakers. For more on the factors affecting European stocks, please click on * The UK blue chip index closed 1.1 percent higher on Friday at 6,204.41, posting another weekly rise, helped by buoyant commodity stocks and continuing a run that has seen it outperform European indexes. * RIO TINTO: Rio Tinto , one of the world's biggest miners, has doubled