PS > I would maintain that Alton Priors church (as at Pewsey and possibly Ingatestone?) most likely occupies the site of a prehistoric circle. <

Actually, I'm no longer sure that Pewsey church actually sits on a prehistoric circle. I am sure, though, that the stones under its foundations did come from a circle but that the circle was more likely to have been in the grove down by the river. The stones were brought <i>up</i> the hill and placed under the church rather than being originally on top of the hill and then pushed down it...

Then again, of course, I might just be talking through my arse :-)