A large cloud ... mushroom shape hanging above the second of two plants in the area, known as Heysham 2. EDF said the cloud was comprised of "clean steam" and was caused by a reactor unit "coming ...

A huge ‘mushroom ... with a nuclear reactor - but explained it was "no cause for concern". EDF said the cloud was comprised of "clean steam" and was caused by a reactor unit "coming offline ...

Residents reported hearing a loud bang and a large cloud emanating from Heysham 2 nuclear power plant ... with the BBC showed a white cloud in a mushroom shape hanging above the second of two ...