Deputy General Secretary Mike Clancy said: “We had a good relationship with Tony Fountain which allowed for a robust dialogue on the challenges facing the NDA and the industry. In particular, the move from micro to macro management of site license companies has been a positive development.

“His departure is not good news as it suggests policy differences. A change in strategy would be unwelcome when the industry needs stability. For example, the government’s recent decision to close the Sellafield MOX plant, on the advice of the NDA, reflects the complex issues being grappled with.

“The NDA will soon be deciding on the future construction of a MOX 2 plant as part of its consultation on plutonium options, being announced at the end of October. It is also due to choose a new parent body company to run Dounreay. An early replacement for Fountain with suitable private sector experience is essential and we expect the industry will want guarantees that NDA strategy will not be derailed.”