UK Stocks-Factors to watch on April 7

April 7 (Reuters) - Britain's FTSE 100 index is seen opening up 8 points, or 0.13 percent, on Thursday, according to financial bookmakers. For more on the factors affecting European stocks, please click on * The UK blue chip index closed up 70.40 points, or 1.2 percent, on Wednesday at 6,161.63, boosted by pharmaceuticals companies as Pfizer pulled out of a deal for Allergan, prompting speculation over other merger and acquisition activity in the sector. * BP: Shareholder advisor