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.
| Directing | Henry Cornelius | Director |
| Production | Michael Balcon | Producer |
| Editing | Michael Truman | Editor |
| Production | Ralph D. Hogg | Unit Production Manager |
| Art | Roy Oxley | Art Direction |
| Directing | Jean Graham | Continuity |
| Camera | Lionel Banes | Director of Photography |
| Sound | Arthur Bradburn | Sound Recordist |
| Costume & Make-Up | Ernest Taylor | Makeup Artist |
| Sound | Georges Auric | Original Music Composer |
| Sound | Ernest Irving | Conductor |
| Production | Hal Mason | Production Supervisor |
| Sound | Stephen Dalby | Sound |
| Costume & Make-Up | Anthony Mendleson | Costume Design |
| Costume & Make-Up | Barbara Barnard | Hairstylist |
| Camera | Cecil Cooney | Camera Operator |
| Directing | Gordon Scott | Assistant Director |
| Production | E. V. H. Emmett | Associate Producer |
| Writing | T. E. B. Clarke | Screenplay |
