But Mosquito Squadron was, I think, purely a studio film.
I think that at least one flying Mosquito was used for the film. It was owned by the City of Liverpool and I met the pilot just after the film was made. He was FO on a Viscount at the time and, during a stopover at Liverpool, he wandered into a hangar to look around and came across the Mosquito. Asked if he thought he could fly it he said that he could and ended up flying it for the film.