It is in the WHS Moth, and Pete is right about the right channels being taken as I recall this coming up 18 months ago at a meeting - basically the WHS can't stop everything, it stops satellite dishes and stops radio masts but not genuine farming requiremenst for additional space. The ground work was observed and there is a report on the County Archaeologist's desk re the findings - which can't be exciting or I would have heard I think.
VBB
As to what Silbaby is...