I must admit to local knowledge - Waterbeach is only 10 miles or so from home. It still looks broadly the same from above, though if you look carefully it is rather derelict. The Army moved out some years (10?) ago, the site has been sold for housing, and some 3500 dwellings will cover the area within a few years.
Your photo is interesting; it must date from the field's years as a fighter base, 1950-63, as it shows an ORP at each end of the main runway. I understand these date from sometime in the 1950s, and were eventually replaced (where needed) by QRA sheds.
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