I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission not required.
One of the few places you can fly drones in London: Publications & policies | The Royal Parks Parking is available and it's a short walk to the flying field
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 11/01/2025. It remains the responsibility of any pilot to check for any changes before flying at the same location.