I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission not required.
TOAL available from public footpath.
However beware of the owner of the property to E/N/W sides as reports indicate that he does not like drones.
Not that the castle itself is NT property and the road to the side that warps around is owned by the aforementioned property owner.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 29/08/2021. It remains the responsibility of any pilot to check for any changes before flying at the same location.