It looks to me like a bridleway that drops down off the North Downs Way - don't know any names of trails (or places!) but if heading from Newlands Corner towards White Down on the NDW, you go up longish drag up the sort of surfaced "easy access route" until you get to the top of the hill, you the go round the big metal gate and turn off on the first right up a rooty trail. This weaves round a bit then after 200-300m comes to a T junction - if you turn left (then right) you end up at White Down - turn right and you are (I think) on that trail - I turn left at 1.02 mins (still bridleway) which takes you down to Abinger roughs. Be careful though as there are often walkers. Hope this helps.