I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
With this being a EH site I waited until after closing time and took off from a quiet country lane layby. Just be mindful of any walkers/traffic using the lane. That said, I was in the air for over 20mins and no one passed by. You can get some stunning shots of the castle and river nearby.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 11/04/2021. It remains the responsibility of any pilot to check for any changes before flying at the same location.