Navigator of the RAF Museum Halifax
I talked to Sgt Vic Stevens, the Flight Engineer when I was an Air cadet over 30 years ago when he did a presentation about his involvement in the raid and its aftermath at my ATC squadron (The HQ of which was a stones throw from his home). The most impressive part of his talk though was when he showed the young cadets his photo album from Stalag Luft III which had quite a few photos in it.