"Filming took place at The Vale of White Horse in Oxfordshire, England. The hill on which the machine is positioned is Dragon Hill, immediately below the Uffington White Horse, a prehistoric hill carving which can be seen briefly in a couple of the shots."
https://youtu.be/pllRW9wETzw
Surrey, south-east England.
http://www.picturesofengland.com/img/X/1030902.jpg
Wiltshire, south-west England.
https://keyassets.timeincuk.net/insp...or_sale101.gif