Operation Hurricane on 3 October 1952 , Britain 's first nuclear bomb , detonated on HMS '' Plym '' on the Montebello Islands in the state of Western Australia , was made of plutonium-239 mostly made at Windscale ( which began production in 1950 ) , with some possibly from Chalk River Laboratories in Ontario , Canada ( where the Tube Alloys project was later moved )
Operation Hurricane
Operation Hurricane
North West England