I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
Dunure Castle is a ruin on a cliff. Parking is at ///handover.gurgling.revise, there was no one taking money when we were there but there's a kiosk when they do. When you've flown around the castle, if you like seafood walk to The Anchorage which faces Dunure's tiny harbour. We only had time for a drink there, but the seafood menu looked lovely as did the dishes we watched go past.
I searched for any drone restrictions but found none, only found lots of drone videos & photos of the castle.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 23/06/2022. It remains the responsibility of any pilot to check for any changes before flying at the same location.