I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
TOAL was just outside the NT boundary near Alfred's Castle.
Ashdown House was built in the early 1660s for William, 1st Earl of Craven, and was designed by either Balthazar Gerbier or William Winde. Legend purports that Ashdown was built during an outbreak of plague in London as a refuge for Elizabeth of Bohemia, to whom Craven was devoted.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 14/11/2021. It remains the responsibility of any pilot to check for any changes before flying at the same location.