Thanks go to my Maltese contacts who have identified the site as Hal Far and confirmed that the aircraft is VX770 on high temperature trials. I wondered if it might be Hal Far, because I think the fire tender and Land Rover are RN designs, and HF was a Royal Naval Air Station. I didn’t recognise the trees as being Maltese but I am assured they are carob trees which are commonly seen in Malta. The things you learn on here!