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What is it all about?

In November 1943 the Press
were invited to have a look around the Secret Underground City.
Click the button above to find out what they saw.
Click on the button below
to see around Tunnel Quarry.

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CAD
Corsham
Sub
Depot 1 Tunnel Quarry

Brewer's
Drift, cleared of debris and supported by concrete props,
became an aero-dynamic wind tunnel through which the CDI fan
sucked fresh air from the outside world.

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