Continuity mistake: After crashing, the pilot jumps from his burning plane with the back of his jacket on fire. The flames are extinguished but after a short dialogue, the pilot is seen walking from the scene from behind with not even a scorch mark on his jacket.
Factual error: In the opening scene, a German buzz-bomb is shown falling on WWII London. In the background, a nuclear power plant can easily be seen. A double mistake of sorts, as there never have been any nuclear power plants near London, even after they were invented.