Paragraph E.2 Development not permitted
In the case of any land within the curtilage of the dwellinghouse which is on article 1(5) land or within a World Heritage Site, development is not permitted by Class E if—
(a)
the total area of ground covered by buildings, enclosures, pools and containers situated more than 20 metres from any wall of the dwellinghouse would exceed 10 square metres;
(b)
any part of the building, enclosure, pool or container would be situated on land between a wall comprised in a side elevation of the existing dwellinghouse and the section of the boundary of the curtilage of the dwellinghouse which faces that wall.