Well there were quite a lot of gunner claims, many confirmed, but yes, I agree.
From memory, this was a compilation soundtrack,made in the studio, broadcast along with actual R/T chatter, when a BBC broadcaster went on a bombing 'Op' (I think it was actually Richard Dimbleby) and I believe it was also used in 'voice over' form with cine film, in a Pathe News film.
I've got the whole lot somewhere, on an old VHS cassette.