Paragraph 21 Apparatus of National Grid in streets subject to temporary prohibition or restriction of use and public rights of wayI1

Notwithstanding the temporary prohibition or restriction of use or diversion of a street or public right of way under the powers of article 11 (temporary prohibition or restriction of use of streets and public rights of way), National Grid is at liberty at all times to take all necessary access across any such street or public right of way and to execute and do all such works and things in, upon or under any such street or public right of way as may be reasonably necessary or desirable to enable it to maintain any apparatus which at the time of the prohibition or restriction of use or diversion was in that street or public right of way.