Consent shall not be granted to development for the purpose of a dwelling house or granny flat unless the consent authority is satisfied that--
(a) the location, scale and design of new buildings will ensure that the visual privacy of residents of buildings on adjoining allotments is not significantly impacted upon, and
(b) direct views from the development into the principal private open spaces or habitable rooms of dwellings on adjoining allotments are minimised or effectively screened.