I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission not required.
Former Transport Reseach Laboratory site. Interesting mix of the remains of the test site - with a test hill and banked track - and forest, water and open areas. Parking is free, but the car park isn’t huge and can get very busy.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 05/02/2023. It remains the responsibility of any pilot to check for any changes before flying at the same location.