I cycled up the runway at Wisley yesterday. Very strange experience. Wish I'd taken some photos but it was similar to this (although I didn't see the tyre dump):
Wisley Airfield - YouTube
The surface is strangely intact in places apart from the ingress of weeds, actually better than some of the surrounding roads! I asked where the airport buildings were/would have been but our guide didn't know. Would have liked to spend a little more time exploring but we needed to get back en route.
Shame about the barriers, and the neighbours. It would probably make a decent cycling track with a bit of tidying up. The NIMBYs would love that...
One of the other cyclists remarked that they'd seen planes there as recently as the last year. Is that possible?