I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
Lowther Castle is a country house in the historic county of Westmorland, which now forms part of the modern county of Cumbria, England. It has belonged to the Lowther family, latterly the Earls of Lonsdale, since the Middle Ages. It is a fully managed ruin, open to visits by the public to the shell of the castle and some of the gardens since 2011. Additional work was completed since that time, most recently on the extensive gardens.
There is a car park here: ///insects.chairing.swatting it is app payment via Ringo. As I visited late on a Sunday afternoon I parked and took off from here: ///letters.slightly.camcorder
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 04/06/2023. It remains the responsibility of any pilot to check for any changes before flying at the same location.