Factual error: Special Duties Lysanders are shown operating from the same airfield as Lancaster Bombers. This never happened, they flew from RAF Tempsford in Bedfordshire. The bombers shown have the squadron code PD, these aircraft flew from RAF Waddington in Lincolnshire.
Factual error: The tailplane of the crashed German bomber is a HE177. The film is set in 1943, the HE177 didn't operate over Britain until 1944.
Other mistake: During the party at Max's house there is no black out despite an air raid going on. Light spills out of the house into the garden.
Plot hole: RAF airfields were heavily guarded, yet Max drives up to a Lysander with wife and child, gets in and starts it without anyone stopping him before help turns up.
