I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
The solar farm is near Desborough Greenspace, a good place to take of and land just beware of dog walkers .you could park at Desborough Leisure centre walking to the furthest part of the park is about 1000 m
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 25/08/2021. It remains the responsibility of any pilot to check for any changes before flying at the same location.