There's something odd about the one at the junction between the A345 and the road to the Winterbournes though, I think it's been carved with the wrong distance to Salisbury on it.
Hang on - To Salisbury VI Miles? Surely that should be V Miles.
Some joker in the distant past has added an I - on all the other milestones on this road that I've seen so far, the Salisbury to Marlborough total mileage is 27, and here it's 28!
Attached is the KMZ file of the milestones I'm interested in.