Netherthorpe. Not easy to spot until you're used to where to find it. Has the shortest licenced runway in the UK. When the sun is in your eyes or the sky is hazy, you can bladder around for ages trying to see the place!
Never been to Fenland, but once used it as a turning point en-route from EGNF to Norwich. Funnily enough, had no problem spotting the airfield on the way down, but on the way back I couldn't see the place for looking!