Would offer too but I’m in wales this weekend.
Probably easiest way to find some half decent trails is to park at the coxford road entrance, pedal straight up the fireroad, when you get to a large crossroads turn left almost back on yourself and should be slightly downhill. Lots of the fun trails cross over this small stretch, push up one of the runs to your left and then come back down over the fireroad and carry on down – from there follow your nose – try to keep heading west and you should come across the workman trail which is one of the best runs. If you hit a stream (tanner’s brook) you’ve gone to far, though there is quite a nice techy rooty run along it. Not much of value over tanners brook.
Hope that vaguely makes some sense. If you look up my profile on garmin connect (DT78) I’m pretty sure I have a couple of gpxs which are publicly viewable. A good 2 hours riding singletrack there, I ride there most evenings.