The UK should close all its coal-fired power stations two years earlier than the government’s pledge of 2025, according to green Conservatives including former energy minister Lord Greg Barker. The move would not cause the lights to go out, would cut both carbon emissions and air pollution and would boost cleaner energy projects, according to a report from Bright Blue, a thinktank of Tory modernisers. The report also concludes that if the troubled Hinkley C…