43.—(1) Where in consequence of the proposed construction of any part of the authorised works, the undertaker or National Gas Transmission requires the removal of apparatus under paragraph 7(2) or National Gas Transmission makes requirements for the protection or alteration of apparatus under paragraph 39, the undertaker must 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 National Gas Transmission’s undertaking and National Gas Transmission must use its best endeavours to co-operate with the undertaker for that purpose.
(2) For the avoidance of doubt whenever National Gas Transmission’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, and any action, decision, cost and/or expense which may be claimed under this Part of this Schedule shall at all times be subject to National Gas Transmission acting reasonably.