Deep South, well Gloucester, actually.
Come to think of it, is that not where PAS operate from? That might explain things, as they have been providing a Bolkow for the Health Service to use during TT and MGP. Some bright spark built the hospital on the inside of the course, you see.
Seem to have managed to justify it up to now.....
PS, it definitely was GMPA. Years of reading registration plates on vehicles going the other way has served me well!