UK Stocks-Factors to watch on March 9

March 9 (Reuters) - Britain's FTSE 100 index is seen opening 2 points higher on Friday, according to financial bookmakers. * SHELL: Royal Dutch Shell Plc and U.S. private equity firm Blackstone Group LP are working on a joint $10 billion bid for BHP Billiton Plc's BLT.L U.S. shale assets, Sky News said on Thursday. Royal Dutch Shell is selling out of the ageing Draugen field in Norway and is also offering small stakes in a number of other fields, according to a document seen by