Sellafield afternoon shift was told not to come to work. This was the first lock-down in the history of the plant. On 18 October 2010, the UK government announced that Sellafield was one of the eight possible sites it considered suitable for future nuclear power stations. On 23 June 2011 the government confirmed the suitability of the site, and hoped an electricity generating company would choose to build a power station near Sellafield at Moorside by 2025. In 2003, it was announced that the Thorp reprocessing plant would be closed in 2010 (later extended to 2018 to allow completion of agreed
Wylfa Nuclear Power Station nuclear station on a site adjacent to the old plant. An application to build two advanced boiling water reactors was submitted by Horizon Nuclear Power to the Office of Nuclear Regulation on 4 April 2017. Wylfa was the second nuclear power station to be built in Wales after Trawsfynydd in 1959. Following the closure of Trawsfynydd in 1991, Wylfa became Wales' only nuclear power station. Construction of Wylfa, which was undertaken by British Nuclear Design & Construction (BNDC), a consortium backed by English Electric, Babcock & Wilcox Ltd and Taylor Woodrow Construction, began in 1963. The reactors were supplied by