in 1956, Calder Hall, Britain's first nuclear power station, began operating.
On 31 March 2003, the plant ceased its job of generating electricity. Calder Hall was closed down after almost 50 years, by which point it was the world's oldest nuclear reactor.
It had been cutting-edge technology in the 1950s, but by 21st century standards its 196 megawatt capacity was considered small.
This important part of Britain's Industrial History is currently being decommissioned, however the "Nuclear Archeologist", Clifford Jones, is now working to preserve this landmark engineering project for future generations.