Independent: Demolition has begun on the site of Britains worst nuclear accident, as scientists are brought in to dismantle the infamous Sellafield chimney. The 110-metre structure on the old Windscale plutonium-producing plant at Sellafield nuclear reprocessing site in Cumbria will finally be cleaned up more than half a century since a fire broke out in its graphite core, in late 1957. It is being dismantled after site managers said the radioactivity had now decayed to safe enough levels to work in. Steve...