38 mins | Documentary, War | Sept. 1, 1937
38 mins | Documentary, War | Sept. 1, 1937
| Producers | British Film Institute, Gaumont-British Instructional |
| Original title | The Gap |
| Directors | J. Leutchford Bacon, Donald Carter |
| Writers | E. V. H. Emmett |
as Air-Vice Marshal (as George Mulcaster)
as Major General Lecturer
as Cabinet Minister Sir Geoffrey
as Butcher (as Jack Vivyan)
as Baker
as Candlestick Maker
as Rich Man
as Poor Man
as Apothecary
as Gunner (uncredited)
as Cashier-Searchlight Operator (uncredited)
as Chemist-Radio Operator (uncredited)
as Orderly (uncredited)