The Windscale Piles were two air-cooled graphite-moderated nuclear reactors on the Windscale nuclear site in Cumberland on the north-west coast of England. The two reactors, referred to at the time as "piles", were built as part of the British post-war atomic bomb project and produced weapons-grade plutonium for use in nuclear weapons.

Christopher Hinton, Baron Hinton of Bankside was a British nuclear engineer, and supervisor of the construction of Calder Hall, the world's first large-scale commercial nuclear power station.