B.3 Development is not permitted by Class B(b) if—E+W
(a)the height of any additional plant or machinery within 3 kilometres of the perimeter of an aerodrome would exceed 3 metres;
(b)the height of any additional plant or machinery not within 3 kilometres of the perimeter of an aerodrome would exceed 12 metres;
(c)the height of any replacement plant or machinery would exceed that of the plant or machinery being replaced; or
(d)the area to be covered by the development would exceed 465 square metres calculated as described in paragraph D.2 below.