Ray, was the car a light colour? Possibly ivory or similar?
If so I have seen the car up on Mountain Road a couple of times whilst in the Mog.
Driver wearing leather flying helmet/goggles.
Always waves.
A few years ago I saw an original Jag in BRG at a petrol stop on M5 in North Devon. Driver put petrol/ lead additive mix in. I delayed leaving to watch him drive off.....what a sound!