Without wishing to add unduly to the "Wassthisthen" trend I would just like to enquire wassthisthen?
52 02 43.18N 0 32 01.43W
Looks like some kind of vehicle testing area - Vauxhall???
Yup, Millbrook - only know because I saw it once while flying out of Heathrow (as Self loading freight) and dug out an OS map!