I have just added this to the map of places to fly your drone at Drone Scene:
Land owner permission requirements unknown.
The track I followed is a County Council ROW. People less lazy than me can refer to the definitive 1:10000 map for paths closer to the solar arrays. https://www.hants.gov.uk/rh/row/maps/1607.pdf
The farm is one of the largest in the UK with a 48 megawatt capacity which can supply nearly 15,000 homes.
The originator declared that this location was not inside a Flight Restriction Zone at the time of being flown on 22/09/2020. It remains the responsibility of any pilot to check for any changes before flying at the same location.