A. The erection or construction and the maintenance, improvement or other alteration by or on behalf of the Crown of—
(a)any small ancillary building, works or equipment on Crown land required for operational purposes;
(b)lamp standards, information kiosks, passenger shelters, shelters and seats, telephone boxes, fire alarms, drinking fountains, refuse bins or baskets, barriers for the control of people and vehicles, and similar structures or works required in connection with the operational purposes of the Crown.
A.1 The reference in Class A to any small ancillary building, works or equipment is a reference to any ancillary building, works or equipment not exceeding 4 metres in height or 200 cubic metres in capacity.