It's worth noting that although the stone run along the road for quite a few miles, their style varies enormously.
IMO a few do indeed 'look' like the 'real deal' http://www.themodernantiquarian.com/image.php?image_id=5998. Some look (as I said on the original thread) kinda like the allegedly iron age Long Tom on Fyfield Down. Others look much more modern & 'tooled' (inc the ones with the holes).
I reckon they are waymarkers NOW (whether the older ones always were, I couldn't say) & the stones are of massively varying antiquity.
What the holes are 'for'? No ideas here I'm afraid. 'Keep left' signs? LOL!
love
Moth
PS Buggernose how long I'm online for this time....