Shortly after becoming Prime Minister in May 1940, Winston Churchill visited the Cabinet War Rooms to see for himself what preparations had been made to allow him and his War Cabinet to continue working throughout the expected air raids on London. It was there, in the underground Cabinet Room, he announced 'This is the room from which I will direct the war'.

The Cabinet War Rooms has since been opened to the public as a Museum for the public to see the exact conditions that Winston Churchill would have been working in whilst directing the war. Much of the Museum remains how it was left when the Cabinet War Rooms were vacated after the war, with some areas being turned into display space and other area into conferencing facilities.