I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
The flooded River Thame and the boundary between Oxon and Bucks, May 2023. There is a small road and a layby nearby for take off and landing from a public right of way.
The boundary stone at the end reads, '1683 Here ends the county of Oxon'. In the fields around can be seen the probable remains of medieval settlement, such as house platforms, hollow-ways and fishponds.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 14/05/2023. It remains the responsibility of any pilot to check for any changes before flying at the same location.