I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission not required.
Estuary / river is crown estate. I was staying in Holiday village which is just off Shaldon road.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 10/07/2021. It remains the responsibility of any pilot to check for any changes before flying at the same location.