Yes, WHBM: even before the war, I remember in 1938 my father worked at RAF Marham, and we went there one day with an aunt and uncle, in his car, and were stopped on the perimeter track by an RAF corporal on a bicycle, who asked my uncle to 'take the lady off the camp'! However, on another occasion I was taken inside a large aircraft there, in a hangar. I didn't know what it was at the time, but I think it was probably a Handley-Page Harrow.