Ed Miliband’s shutdown of the North Sea will cost the Government £10bn in lost tax revenue between now and 2030 - Christopher Furlong//Getty Images Britain’s largest oil field could be producing thousands of barrels a day by the autumn if Ed Miliband approves the North Sea project, its co-owner has said. Ithaca Energy, which owns the Rosebank site off Shetland, on Wednesday said it was poised to get oil flowing within months but the Energy Secretary first needed to sign off on the plan. Rosebank, 60 mi ...