I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission not required.
TOAL from the lay-by directly opposite the entrance to the park off Spratgate Lane.
The Cotswold Water Park is an area of 40 square miles, with more than 150 lakes, set across the countryside of Wiltshire, Gloucestershire and West Oxfordshire. It is approximately the same size as the island of Jersey and has been subjected to over 50 years of gravel extraction which of course now form the lakes.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 15/01/2022. It remains the responsibility of any pilot to check for any changes before flying at the same location.