I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
Hornsea Mere is owned by Wassand Hall. It is opened to the public for numerous activities. Not sure if drone flying is allowed from the sailing club. The sailing club carpark is only opened during the day. I parked on Hull Road and took a public footpath to capture the footage. Beautiful walk in summer.
Be aware that this is a SSSI site for birds so be alert, careful with your flying.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 25/08/2024. It remains the responsibility of any pilot to check for any changes before flying at the same location.