At the request of Devon County Council and the Devon Landscape Policy Group a London firm called Land Use Consultants has produced a document titled Guidance on the Siting, Design and Assessment of Wind and Solar PV Developments in Devon. It is intended as a draft for a new DLPG Advice Note No. 2. The stated closing date for responses was 5 December, but Mel Hinde of DCC would probably be receptive to comments after that.
The draft document can be read here.