11.—(1) The undertaker, during and for the purposes of carrying out the authorised development, may temporarily close, alter or divert any street or public right of way and may for any reasonable time—
(a)divert the traffic from the street or public right of way; and
(b)subject to paragraph (3), prevent all persons from passing along the street or public right of way.
(2) Without prejudice to paragraph (1), the undertaker may use any street or public right of way closed under the powers conferred by this article within the Order limits as a temporary working site.
(3) The undertaker must provide reasonable access for pedestrians going to or from premises abutting a street or public right of way affected by the temporary closure, alteration or diversion of a street or public right of way under this article if there would otherwise be no such access.
(4) Without prejudice to the generality of paragraph (1), the undertaker may temporarily close, alter or divert the streets and public rights of way specified in columns (1) and (2) of Schedule 5 (Streets subject to street works) to the extent specified, by reference to the letters and numbers shown on the rights of way plans, in column (3) of that Schedule.
(5) The undertaker must not temporarily close, alter or divert—
(a)any street or public right of way specified as mentioned in paragraph (4) without first consulting the street authority; and
(b)any other street or public right of way without the consent of the street authority which may attach reasonable conditions to any consent, but such consent is not to be unreasonably withheld.
(6) If a street authority fails to notify the undertaker of its decision within 42 days of receiving an application for consent under paragraph (5)(b) that street authority is to be deemed to have granted consent.