It wasn’t just the Labour Party that Ed Miliband fucked up, he was also the Minister that pushed through the repulsively reactionary and absurd Climate Change Act in 2008. Leaving aside the way the resulting higher energy costs (which were a deliberate part of the policy) pushed tens of thousands of poor people into fuel poverty, it also significantly raised the cost of electricity for industrial users (such as the Tata steel plants in Wales). Ed Miliband is campaigning to make the Climate Change act even more draconian.
This chart shows how UK energy costs have soared compared to other EU countries since the Climate Change act came into affect.