I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
Aydon Castle is described as a fine example of a 13th Century manor house.
There is an English Heritage Pay-and-Display car park at W3W: ///makeovers.unimpeded.rational
If the car park is closed, park on the verge opposite.
The castle is closed until 01 April 2023.
The track to the castle is sign-posted as a private road, parking is not allowed on the track/ verges.
The good news is that the track is also a public footpath that leads to the castle gate.
There are farm buildings and holiday cottages opposite the castle gate.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 05/03/2023. It remains the responsibility of any pilot to check for any changes before flying at the same location.