To see how much Ed Miliband is enjoying his second life in politics, watch him at the dispatch box. Every few weeks MPs get a chance to prod the energy secretary; they receive sharp jabs in return. Tories are lambasted for delaying the roll-out of cheap and popular wind turbines. Greens and Liberal Democrats are chided for appearing eco-er than thou and then blocking the pylons that would carry clean power to people’s homes. Mr Miliband picks fights with Reform UK, a flag-waving right-wing party, for failing to back GB Energy, a fledgling state-owned energy firm.