From the introduction.
In the 1950s, as the threat of nuclear war loomed large, the Tunnels became an underground facility for the potential relocation of Government in time of crisis. This role was retained until 2004 when, the Cold War having ended, the site was declassified, though still remaining part of the Ministry of Defence estate.
Much of what remains today reflects the Tunnels’ service as a nuclear bunker – ‘Burlington Bunker’, as it was code-named – but there is also ample evidence of their earlier roles.
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