23.—(1) No stage of the authorised development consisting of the construction or alteration of a street which is a trunk road, including any traffic management and control measures, is to commence until written details of the design of the street have been submitted to and approved by the Highways Agency, after consultation with Centrica plc and Royal Mail Group Ltd.
(2) The undertaker must have regard to any consultation responses received.
(3) The authorised development consisting of the construction or alteration of the street and any traffic management and control measures must be carried out in accordance with the approved design.