Y'areet Paulus,
Cheers mon, it was a good tip off.
I was geared up for a week of searching for the buggers, but it turns out they are known of by some of te more erudite folk down there, but due to the incredible density of megaliths nearby, few people seem to hike up to Fyfield.
I was tickled pink to see them, it set me off on a total 'Sarsen texture' tangent for the rest of the week. It's well strange stuff, I reckon there are other stones with artficial markings, but they're so similar to natural features, no one would go out on a limb and claim them to be artificial, proper threshold phenomena that they are. The Fyfield ones are a bit more obvious due to the alignments of the groups, and they are almost perfectly circular, unike the natural pits.
I'll post the couple of pics I got, I think some of the others who were there during the day may have some pics too.