6.—(1) The provisions of this Order have effect for the benefit of—
(a)National Grid in respect of the authorised development; and
(b)WPD in respect of the WPD Works.
(2) WPD may not carry out the WPD Works under article 3(1)(b) (development consent etc. granted by the Order) except in accordance with the written consent of National Grid, which may be granted subject to reasonable conditions.
(3) If WPD fails to carry out the WPD Works in accordance with National Grid’s consent, National Grid may give WPD and the Secretary of State notice that National Grid intends to carry out the WPD Works under article 3(1)(a) from a date specified in the notice.
(4) On the date specified in the notice, WPD is to cease to have the benefit of article 3(1)(b) and paragraph (1)(b) of this article.