11.—(1) The undertaker may during and for the purposes of carrying out the authorised development, temporarily stop up, alter or divert any street and may for any reasonable time—
(a)divert the traffic from the street; and
(b)subject to paragraph (2), prevent all persons from passing along the street.
(2) The undertaker must provide reasonable access for pedestrians going to or from premises abutting a street affected by the temporary stopping up, alteration or diversion of a street under this article if there would otherwise be no such access.
(3) The undertaker must not temporarily stop up, alter or divert any street for which it is not the street authority without the consent of the relevant street authority which may attach reasonable conditions to any consent (including specifying the time period during which the street may be stopped up, altered or diverted) but such consent must not be unreasonably withheld.
(4) Any person who suffers loss by the suspension of any private right of way under this article is entitled to compensation to be determined, in case of dispute, under Part 1 of the 1961 Act.
(5) If a street authority who has received an application for consent under paragraph (3) accompanied with all relevant information fails to notify the undertaker of its decision before the end of the period of 42 days beginning with the date on which the application was submitted with all relevant information, it is deemed to have granted consent.