That has me baffled, Richard. I was at Gatwick yesterday and the spot to catch the aircraft using 08 is adjacent to a field but it is not possible to see the aircraft on the runway from there.
Here's a typical view of an inbound aircraft arriving on 08:
Ship Photos, Container ships, tankers, cruise ships, bulkers, tugs etc
You need to park a decent walk (about 10 mins) from there. Parking at or near the spot at the western end will see you moved on pretty sharpish.
PM me if you want further instructions.
Kelvin