Guardian: Britain must revert to greater state control of energy markets to hit ambitious targets on renewable energy and climate change, according to the former head of BP. Lord Browne of Madingley warns that market mechanisms are failing to deliver the necessary growth in clean energy. Crucial offshore wind projects could be cancelled unless there is an urgent rethink of energy policy, he says. In a speech tonight at Cardiff University, Browne will say: “Competition has been the …