Step back in time at Derby House, a key operational hub during World War Two. Once a top-secret labyrinthine bunker, it was the nerve-centre for the war-defining Battle of the Atlantic. Now home to the Western Approaches Museum, it remains a time-capsule hidden beneath Liverpool City Centre. Explore original documents, tools, and maps used to analyze the enemy. Don't miss the opportunity to see one of the two surviving phones that had a direct line to Churchill's War Rooms!