Thanks to Sixfingers for the lead, and the nightime visit the previous day.
RAF Swinderby was created as a WW2 Bomber Command airfield, and during the war was built, concreted, lengthened, expanded, but ended up as a training school for the rest of it's life. It's history is here... http://www.raf.mod.uk/bombercommand/s80.html
First stop, the 'modern' control tower. Considering it's 50% glass it's in very good condition with little damage by our standards. I want this as my house...