8. In Part 1ZA (development to a building containing a flat) of schedule 1 after class 4A insert—
“Class 4B.—
(1) The provision of a building within the curtilage of a flat.
(2) Development is not permitted by this class if—
(a)the resulting building would exceed—
(i)150 centimetres in height,
(ii)120 centimetres in depth,
(iii)250 centimetres in width,
(b)the development would result in there being more than one building developed by virtue of this class situated within the curtilage of the flat,
(c)the resulting building would obstruct clear sight of a road or footpath by the driver of a vehicle entering or leaving the curtilage of the flat,
(d)the resulting building would be situated within the curtilage of a listed building or a World Heritage Site,
(e)the resulting building would create an obstruction to light to another building.
(3) In this class—
“curtilage of a flat”, in relation to a flat, means land which pertains to that flat and only to that flat, and
“World Heritage Site” means land appearing on the World Heritage List kept under article 11(2) of the 1972 UNESCO Convention for the Protection of the World Cultural and Natural Heritage.”.