I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
NT car park (free, unmanned, 24/7) about 45 mins walk from summit. Or walk from Abergavenny or any other direction on PROWs.
Generally good for inversions November into December.
Be aware of occasional low flying helicopters and aircraft transiting to/from SENTA.
Entire hill is NT land but there are public roads and right's of way dotted around for legal TOAL.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 01/12/2022. It remains the responsibility of any pilot to check for any changes before flying at the same location.