I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
Best avoid TOAL from the NT. Car park and take a short walk around the quarry on one of the public footpath which lead around to Milecastle 42. This is open land with grazing livestock and a few walkers following the route of Hadrian's Wall. There is plenty of space to fly from and quite an interesting area.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 29/04/2021. It remains the responsibility of any pilot to check for any changes before flying at the same location.