I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission not required.
Plenty of parking locations in the area, I took off from Fleetwood Marsh Nature reserve: ///daisy.punctual.reading
Located within a sheltered enclosed dock, The marina offers 184 fully serviced berths, a 75 tonne boat hoist, laundry & luxury toilet/shower facilities.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 26/07/2022. It remains the responsibility of any pilot to check for any changes before flying at the same location.