Saw a good'n a few years ago much to the amusement of all who watched. It was a 1983ish army training video on codes of conduct set in a post apocolyptic Germany. Two British squaddies come across (easy..not that sort of film) a German lady in a barn and make moves to defile ths poor lady.
Enter young British officer, pistol in hand, lip in stiff-upper position, Best of British accent. He busts through the door and screams some sense back into the oiks. They wipe snot from there noses and amble out of the barn to hunt for Ivan. Good old Tommy Atkins!
My dad remembered one from when he was a lad circa early 60s - a film was played in his school assembly by an army recruiting team. It involved a team of British soldiers in some arse of the Empire ordering the natives around in some mock counter-insurgency. One immigrant lad in the assembly hall stood up shouting "why are you doing that to my people?" and had a right old go at the army recruiters. oops!