A BBC investigation has uncovered a catalogue of safety concerns at the UK’s most hazardous nuclear site.
Panorama found parts of Sellafield regularly have too few staff to operate safely and that radioactive materials have been stored in degrading plastic bottles.
The programme was told that parts of the facility are dangerously rundown.
Sellafield says the site in Cumbria is safe and has been improved with significant investment in recent years.
The Panorama investigation was prompted by a whistle-blower – a former senior manager who was worried by conditions.