Salisbury seems to be at the center of a black hole according to the folk club map too!
(open in a browser, not 'maps')
https://www.google.com/maps/d/u/0/viewer?mid=1plE0C69JOiO8FotbmDlDvE2qxbM&ll=51.11%2C-1.83&z=10
There's a FB page for Wiltshire might be worth asking on
https://www.facebook.com/groups/Wiltshirefolk