This is an interesting one, tucked away in the tiny hamlet of Coate, technically part of Swindon, Wiltshire; very close to Coate Farm where Richard Jefferies grew up and lived for much of his short life.

It stands unseen by the thousands of cars that speed by on the dual carriageway leading to Junction 15 on the M4. The road it stands on is the original 'road out of Swindon' leading to Marlborough and Hungerford ... little more than a lane by today's standards.

http://swindonia.blogspot.com/2008/01/coate-hamlet-and-milestone.html