When an unexploded WWII bomb is accidentally detonated in Pimlico, it reveals a treasure trove and documents proving that the region is in fact part of Burgundy, France and thus foreign territory. The British government attempts to regain control by setting up border controls and cutting off services to the area.

• Ealing Studios
• Stanley Holloway
• Hermione Baddeley
• Margaret Rutherford
• Paul Dupuis
• Raymond Huntley
• John Slater
• Jane Hylton
• Betty Warren