When I was on 214 Sqdn at Marham circa 1959-62, our dispersal was very close to the Bloodhounds of 242 Sqdn.
It was unusual to see any human presence, as I believe that they were all underground.
Occasionally, a section/flight of Bloodhounds would slowly start tracking. We could only surmise that they were tracking an 'intruder', probably a civil airliner, as an exercise. It was quite an eerie experience as it seemed to happen randomly and silently.