So as long as they build something decent at Avebury and not (as you say) some tacky cloney houses..
I wonder what are the chances of them not being rather cloney bearing in mind the developers ain't conservationists they're profit-seekers and the clonier they are the bigger will be their profit margin and the planners have precious little power to influence things for the better?
Swapping an unsightly garage for a couple of nice befitting houses sounds OK at first but where's the guarantee what's in our minds' eyes will be what gets built? Absolutely nowhere. Also, it's not just one or two or even five. This may well ease open the door leading to a long line of 20+ in a few years. I think all those heritage bodies that opposed this had that precise thought in their minds and they were dead right to oppose it.
Incidentally, they are to be three bedroomed houses. I'll bet you they are three bedroom/two bathroom/three car jobs in the end. What will those cost?