UK Stocks-Factors to watch on March 12

March 12 (Reuters) - Britain's FTSE 100 index is seen opening up 8 points higher at 7,233 on Monday, according to financial bookmakers. * GKN-MELROSE: GKN has struck a $6.1 billion deal to merge its automotive business with U.S. company Dana Incorporated in a move by the British engineer to fend off a hostile takeover by turnaround specialist Melrose Industries. * RECKITT BENCKISER: Reckitt Benckiser has no regrets about its $17 billion acquisition of Mead Johnson last year, its