UK Stocks-Factors to watch on March 23

March 23 (Reuters) - Britain's FTSE 100 index is seen opening up 12 points at 7,337 on Thursday, according to financial bookmakers. * GLAXOSMITHKLINE: Britain's GlaxoSmithKline and U.S.-based Regeneron Pharmaceuticals are embarking on a joint project with UK Biobank, the world's most detailed biomedical database, to hunt for new clues linking genes and disease. * SHELL: Royal Dutch Shell agreed to lease capacity at a large oil terminal in Panama that has been used by U.S. re