The erection, construction, maintenance, improvement or alteration of a gate, fence, wall or other means of enclosure.
Development is not permitted by Class A if—
(a)the height of any gate, fence, wall or means of enclosure erected or constructed adjacent to a highway used by vehicular traffic would, after the carrying out of the development, exceed one metre above ground level;
(b)the height of any other gate, fence, wall or means of enclosure erected or constructed would exceed two metres above ground level;
(c)the height of any gate, fence, wall or other means of enclosure maintained, improved or altered would, as a result of the development, exceed its former height or the height referred to in sub-paragraph (a) or (b) as the height appropriate to it if erected or constructed, whichever is the greater; or
(d)it would involve development within the curtilage of, or to a gate, fence, wall or other means of enclosure surrounding, a listed building.