Invasion Quartet 1961 Story by Norman Collins, screenplay by Jack Trevor Story and John Briley, directed by Jay Lewis. A British comedy set near the end of World War 2.
Wounded military men are billeted in an old manor house near the southern coast of England. They're considered unfit for duty and need some recuperation. Bill Travers plays Freddie Oppenheimer, he's lost a leg but he's raring to get back to active duty. Grégoire Aslan plays a French officer called Debrie, he shares Freddie's passion for active duty despite losing a hand. Spike Milligan plays Godfrey Pringle, he's an expert on explosives, John Le Mesurier is a Colonel in the Home Guard, Thorley Walters plays Cummings and Millicent Martin plays a nurse called Kay.
Their recovery is interrupted daily by the firing of Big Hermann, a giant canon on a rail car. A plan hatches in Freddie's head, he's going to blow up Big Hermann. He recruits Debrie, Godfrey and Cummings. After BH blows up the Colonel's squad car he joins forces with Freddie and co. Freddie gets a boat and sails for France with the other 4 men, poor Cummings gets hurt and they have to leave him behind. In France they disguise themselves as Frenchmen and travel to Big Hermann's location by bus. They cheat some drunken German soldier's out of their uniforms and gain access to the cannon.
It's a rather slight comedy, there's plenty of slapstick. It's slightly above average but I still enjoyed it. I'd watch it again which is lucky as I bought the Warner Archive DVD.