GMB union says urgent action needed to tackle safety concerns at Sellafield

Guardian investigation has revealed areas that need attention at nuclear site in Cumbria

The GMB trade union has called on the government and nuclear authorities to take urgent action" to address concerns over safety at Sellafield.

The union has written to the energy minister, the Nuclear Decommissioning Authority (NDA) and Sellafield's chief executive to demand greater investment into keeping the 11,000 employees at the vast nuclear rubbish dump in Cumbria safe.