Right, I’d forgotten about this!
Someone mentioned Gangers to M25- that’s Al Fayeds, although it’s still not back to former glories after resurfacing. The friday bridleway that joins it halfway down is alright if you like a plummet.
Down to the Convent school- stuff to explore in both directions, but when it’s quiet. There’s a couple of other drops off the ridge more over towards Godstone that are varying degrees of interesting, if sadly short.
The featherbed lane/frith wood descent is fun as a blast, which side are you coming in from at the top, right or left? (i.e. farleigh or selsdon). There’s a bit more to the NE of there that I’m not as familiar with if you’re prepared to look, but it’ll take a bit of work to string a nice loop out of it. There is one if you’re prepared to work at it though.
I wouldn’t know about riding anything other than the bridleway through littleheath woods……