A dummy cruiser tank being assembled at the camouflage school at Beaumetz, 24 April 1940.

A dummy cruiser tank being assembled at the camouflage school at Beaumetz, 24 April 1940. (Credits: © IWM (F 4008))

A dummy cruiser tank being assembled at the camouflage school at Beaumetz, 24 April 1940. (Credits: © IWM (F 4008))