Canadian pilots used the standard RAF palm out salute - not the palm down 'snap' of the US forces.
The phonetic alphabet in WW2 used Charlie Mike Love Dog for C, M, L and D (not Not 'Crocodile', 'Monkey', 'Delta, 'Lima''). The NATO 'standard' was not adopted until 1956
No-one in the RAF ever referred to it as 'the Force' - it was 'the mob'
Finally, collar attached shirts didn't come along until 1963.
The closest RAF base to Norwich would have been RAF Coltishall.. The Early Warning radar at RAF Trimingham would have picked up a Vampire while it was still in Germany.
The Mosquito Pilot has a beard. Beards were not allowed in the RAF in 1943.
The cockpit of the deHavilland Vampire, the aircraft flown by the main character, featured a backup compass which was purely magnetic and therefore independent of the electrical system. It would not have been affected by an electrical failure.
On departure, the pilot asks for a "QFE". This is the pressure setting for his altimeter that gives the aircraft's altitude over the runway surface and is required when landing. When taking off, the correct request would be for a "QNH" which gives the pressure setting that would give him his altitude above mean sea level. Particularly useful when just about to fly over the North Sea.
The aircraft in the poster bears no resemblance to the aircraft in the film, which is a de Havilland Vampire - a British jet fighter that first flew in 1943, and was the world's first single engined jet fighter. The Vampire has a distinctive "twin boom" design, whilst the aircraft in the poster is a contemporary Hawker Sea Hawk - a naval aircraft designed to be used from aircraft carriers and not used by the RAF at all.
Although withdrawn from front line fighter service in 1953, the Vampire remained in service as a ground attack and training aircraft and was only fully retired in 1966.
Before departing, Freddie salutes the briefing officer while bareheaded. A member of the RAF who is not wearing headgear renders the hand salute only when boarding or leaving a ship.