Guardian: <figure> <figcaption>Chris Huhne, the new energy secretary, said: ‘What we are effectively paying for here is decades of cheap nuclear electricity.’ Photograph: Matt Cardy/Getty Images</figcaption> </figure> Britain is facing a £4bn black hole in unavoidable nuclear decommissioning and waste costs, Chris Huhne, the energy and climate change secretary disclosed tonight. The decommissioning costs over the next four years revealed by officials to Huhne are so serious that he has …