(6) If a street authority which receives an application for consent under paragraph (4) fails to  notify the undertaker of its decision before the end of the period of 28 days beginning with the  date on which the application was made, it is deemed to have granted consent.  13. —(1) Subject to the provisions of this article, the undertaker may, in connection with the  carrying out of the authorised development, stop up each of the streets and private means of access  specified in column (1) of Parts 1, 2, 3 and 4 of Schedule 4 (permanent stopping up of streets and  private means of access) to the extent specified and described in column (2) of that Schedule.  (2) No street or private means of access specified in column (1) of Parts 1 and 3 of Schedule 4 is  to be wholly or partly stopped up under this article unless—  (3) No street or private means of access specified in column (1) of Part 4 of Schedule 4 is to be  wholly or partly stopped up under this article unless the condition specified in paragraph (4) is  satisfied in relation to all the land which abuts on either side of the street or private means of  access to be stopped up.  (4) The condition referred to in paragraph (3) is that—  (5) Where a street or private means of access has been stopped up under this article—  (6) Any person who suffers loss by the suspension or extinguishment 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.  (7) This article is subject to article 32 (apparatus and rights of statutory undertakers in stopped  up streets).  14.  The undertaker may, for the purposes of the authorised development, form and lay out  means of access, or improve existing means of access, at such locations within the Order limits as  the undertaker reasonably requires for the purposes of the authorised development.  13 Access to works  Permanent stopping up and restriction of use of streets and private means of access  (a) the new street or private means of access to be constructed and substituted for it, which is  specified in column (3) of those Parts of that Schedule, has been completed to the  reasonable satisfaction of the street authority and is open for use; or  (b) a temporary alternative route for the passage of such traffic as could have used the street  or private means of access to be stopped up is first provided and subsequently maintained  by the undertaker, to the reasonable satisfaction of the street authority, between the  commencement and termination points for the stopping up of the street or private means  of access until the completion and opening of the new street or private means of access in  accordance with sub-paragraph (a).  (a) the undertaker is in possession of the land;  (b) there is no right of access to the land from the street or private means of access  concerned;  (c) there is reasonably convenient access to the land otherwise than from the street or private  means of access concerned; or  (d) the owners and occupiers of the land have agreed to the stopping up.  (a) all rights of way over or along the street or private means of access so stopped up are  extinguished; and  (b) the undertaker may appropriate and use for the purposes of the authorised development so  much of the site of the street or private means of access as is bounded on both sides by  land owned by the undertaker. 