On 19/01/2014 11:45, Capitol wrote:
The bit I haven't understood is why a roofing company hasn't come
up with a solar panel roof? Or have they? I can't see the case for
drilling holes to install panels on top of roof tiles/slates.

They have, but I note they are no longer in the Marley roofing
catalogue. IIRC they were significantly more expensive than add on panels.

Colin Bignell