Disappointingly little to find. Only
Titsey came up, I have no idea whether that strip is still active.
Ah, and there's Orchard House field, 1 mile or so East of Crockham Hill.
A bit more distant there's a few: see
https://www.openstreetmap.org/#map=13/51.1855/0.4513 I suppose I needn't mention Biggin Hill and Rochester?