93.—(1) Where in consequence of the proposed construction of any part of the authorised works, the undertaker or NGT requires the removal of apparatus under paragraph 87(2) or NGT makes requirements for the protection or alteration of apparatus under paragraph 89, the undertaker shall use its best endeavours to co-ordinate the execution of the works in the interests of safety and the efficient and economic execution of the authorised works and taking into account the need to ensure the safe and efficient operation of NGT’s undertaking and NGT shall use its best endeavours to co-operate with the undertaker for that purpose.
(2) For the avoidance of doubt whenever NGT’s consent, agreement or approval is required in relation to plans, documents or other information submitted by the undertaker or the taking of action by the undertaker, it must not be unreasonably withheld or delayed.