I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
Park in a lay-by called The Peth ///bypassed.treaty.zoos from here you can take off and fly towards the Castle. Flight took place later in the evening when the Castle was closed. Consider it is a private residence, I chose not to overfly and took images from beyond the perimeter. To view the other side I parked in the Greenwell Road car park ///deflection.trackers.cats.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 08/06/2022. It remains the responsibility of any pilot to check for any changes before flying at the same location.