FTSE buoyed by oil shares after OPEC agrees supply curbs

By Alistair Smout and Adela Suliman LONDON (Reuters) - Britain's top share index rose near a 1-1/2 year high on Thursday, boosted by a rise in its heavyweight energy sector as a decision by OPEC to curb output for the first time since 2008 lifted oil prices. Energy stocks added 47 points to the FTSE 100 , contributing more than half of its rise. Heavyweight oil firms such as Royal Dutch Shell and BP were up 5.6 and 4.5 percent respectively.