I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
Sturminster Newton Mill is still in good working order, the present mill dates from the mid16th century with considerable mechanical renovation in the early 20th century, although there has been a mill on this site for over 1000 years.
The car park was empty when I arrived, however there is plenty of parking on the road. Take off anywhere along the pathway next to the river.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 15/05/2024. It remains the responsibility of any pilot to check for any changes before flying at the same location.