15U.K.Notwithstanding the temporary stopping up or diversion of any highway under paragraph 22 of Schedule 2 above, the undertakers shall be at liberty at all times to execute and do all such works and things in, upon or under any such highway as may be reasonably necessary to enable them to inspect, repair, maintain, renew, remove or use any apparatus which at the time of the stopping up or diversion was in that highway.