I have visited this incredible Museum before but never took the opportunity to Photograph It. It amazes me how it lies underneath a building within the very heart of the city but yet remained top secret for years. To think that from here the entire Atlantic U-Boat War was countered. "Walk through hidden rooms and discover the stories locked in the wartime bunker that protected the tactics and secrets of the British Armed Forces plotting to bulwark the Western Approaches and aid the Allied victory. Glimpse the documents and tools the forces used to monitor enemy convoys and inform the British government of their findings whilst keeping their intelligence secret from the enemy, including one of only two surviving wartime phones which had a direct connection to the war cabinet in London. See where commanders and WRNS and WAAF personnel worked every day and night in the Map Room, the nerve centre of the Battle of the Atlantic. Here they monitored convoy routes and vital shipping lines, and pin-pointed enemy locations on a huge map laid across the table; total accuracy was necessary to enable the Royal Navy to contact and destroy the enemy. The Map Room has remained exactly how as it was left when the doors were closed on 15 August 1945." Well worth a visit for just the £6.00 entry fee!.