I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission not required.
Free Parking at Flatts Lane Country park.
Monument is on the site of an iron age fort and later a watchtower from the Napoleonic wars era.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 23/06/2022. It remains the responsibility of any pilot to check for any changes before flying at the same location.