SCHEDULE 2Permitted development rights
PART 19Development by the Crown or for national security purposes
Class C – developments on operational Crown land
Development not permitted
C.1
Development described in Class C(a) is not permitted if—
(a)
it would materially affect the external appearance of the premises; or
(b)
any plant or machinery would exceed a height of 15 metres above ground level or the height of anything replaced, whichever is the greater.