I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
At time of my visit, there is a no flying allowed while castle is open., but was closed when I visited. Parked at top of the hill off main road and walked down.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 26/06/2020. It remains the responsibility of any pilot to check for any changes before flying at the same location.