This is a nice look at some secret military bunkers some which are not disused and others in private hands. Flown in severe winds hence the bobbing and kicking and stiff looking yaws (pan arounds). You even see the camera stabiliser (gimbal) lose it completely and get blown sideways a couple of times... Hairy stuff.
Sites featured in Corsham are Monks Park, Rudloe Manor House, Copenacre, Octavian Wines, GOSCC, Basil Hill Barracks.