Lanc crews were virtually always 7. Sometimes a “second dickie” (pilot on first op) came making up 8. Dont know how they can do it with 5 unless they ignore both gunner positions and film ahead of the main spar where the Pilot, Flight Engineer, Navigator, Wireless Op and bomb aimer are located. To be honest if they planned doing all interior and exterior lanc filming on one day then it sounds a little low budget. Hope not.
Steve