The item is a duplicate of MP/DOV0619, except that it lacks the drawing number S.N.W. 02/60. The plan is undated, but probably originates from around 1938, when proposals for the re-use of the tunnels (called 'caves' on the item) were drawn up as the threat of war mounted. The plan shows tunnels occupied by the Admiralty and the GPO. The original was marked 'secret' and the copy is stamped 'secret'.
Contact Historic England Archive
Hanoverian Barracks, Hanoverian Tunnel, Early 20th Century Military Headquarters
Please update your browser
Our website works best with the latest version of the browsers below, unfortunately your browser is not supported. Using an old browser means that some parts of our website might not work correctly.