A.2—(1) Class A(a) and Class A(c) development is permitted subject to the condition that any antenna or supporting apparatus, radio equipment housing or development ancillary to radio equipment housing constructed, installed, altered or replaced on a building in accordance with that permission is, so far as is practicable, sited so as to minimise its effect on the external appearance of the building.
(2) Class A(a) and Class A(c) development is permitted subject to the condition that any apparatus or structure provided in accordance with that permission is removed from the land, building or structure on which it is situated—
(a)if such development was carried out in an emergency on any article 2(3) land or on any land which is, or is within, a site of special scientific interest, at the expiry of the relevant period, or
(b)in any other case, as soon as reasonably practicable after it is no longer required for electronic communications purposes,
and such land, building or structure is restored to its condition before the development took place, or to any other condition as may be agreed in writing between the local planning authority and the developer.
(3) Class A(b) development is permitted subject to the condition that any apparatus or structure provided in accordance with that permission must, at the expiry of the relevant period, be removed from the land and the land restored to its condition before the development took place.
(4) Subject to sub-paragraph (5), Class A development—
(a)on article 2(3) land or land which is, or is within, a site of special scientific interest, or
(b)on any other land and consisting of the construction, installation, alteration or replacement of—
(i)a mast;
(ii)an antenna on a building or structure (other than a mast) where the antenna (including any supporting structure) would exceed the height of the building or structure at the point where it is installed or to be installed by 6 metres or more;
(iii)a public call box;
(iv)radio equipment housing, where the volume of any single development is in excess of 2.5 cubic metres,
is permitted subject, except in case of emergency (in which case only paragraph A.3(11) applies), to the conditions set out in paragraph A.3.
(5) The conditions set out in paragraph A.3 (prior approval) do not apply in relation to Class A development on any article 2(3) land which consists of the construction, installation, alteration or replacement of a telegraph pole, cabinet or line, in connection with the provision of fixed-line broadband, provided that the development is completed on or before 30th May 2018.