A beacon to mark that you were nearing home. Me too! Perhaps all Midlanders feel the same way!
There's precious little on the net about it, just a few references to being Neolithic and artificial. Some flint and pottery. (I've found some worked flint in the ploughed field alongside, and though I'm no expert I think there are bits of pottery from every era there).
If it was in Wilts it would be a superstar, don't you think?