http://www.harlowstar.co.uk/News/Harlow-news/Horse-killed-by-car-after-breaking-free-from-roadside-tether-06112012.htm

A horse possible belonging to Gypsies Killed in road accident near me...

There are a few Horses tethered along the road side. They should not be there.
They are allowed on the common but not by the roadside.