I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
I parked in the riverside car park in East-the-Water, facing the Quay and downstream from the Old Bridge. All the flying was at a good height over the river.
Bideford is a port town that has a history that goes back centuries. The Torridge is fully tidal here with a big difference between high and low tides; I'd say these photos are in the middle of the range.
I was brought up in Bideford but this is the first chance I had to fly a drone there - there's lots of potential all around here!
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 16/10/2023. It remains the responsibility of any pilot to check for any changes before flying at the same location.