I stand be corrected, but I don't think we actually see any enemy planes in this reenactment of one day (and night) in the life of a team of firefighters using actual firemen, which treats the Blitz more like a natural disaster than an act of aggression from abroad.
The cast of 'Fires Were Started' were all non-professionals, but Wally Patch later briefly appeared unbilled as a civil defence warden arriving alongside Dr. Reeves in 'A Matter of Life and Death' to remind us that people were killed doing this job; and ending the film in wartime with the funeral of one of the team required considerable horsetrading with the authorities.
The cast of 'Fires Were Started' were all non-professionals, but Wally Patch later briefly appeared unbilled as a civil defence warden arriving alongside Dr. Reeves in 'A Matter of Life and Death' to remind us that people were killed doing this job; and ending the film in wartime with the funeral of one of the team required considerable horsetrading with the authorities.