26.—(1) The undertaker must give to National Grid not less than 14 days’ notice in writing of its intention to commence construction of any National Grid connection works and notice in writing of its completion not later than 7 days after the date on which it is completed and National Grid will be entitled by its officer to watch and inspect the construction of such works.
(2) If any part of the National Grid connection works is constructed otherwise than in accordance with paragraph 24(2) above National Grid may by notice in writing identify the extent to which the National Grid connection works do not comply with the approved details and request the undertaker at the undertaker’s own expense carry out remedial works so as to comply with the requirements of paragraph 24(2) of this Schedule or such alternative works as may be agreed with National Grid or as otherwise may be agreed between the parties.
(3) Subject to sub-paragraph (4), if within a reasonable period, being not less than 28 days beginning with the date when a notice under sub-paragraph (2) is served upon the undertaker, the undertaker has failed to begin taking steps to comply with the requirements of the notice and has not subsequently made reasonably expeditious progress towards their implementation, National Grid may execute the works specified in the notice and any reasonable expenditure incurred by National Grid in so doing will be recoverable from the undertaker.
(4) In the event of any dispute as to whether sub-paragraph (2) is properly applicable to any work in respect of which notice has been served under that sub-paragraph, or as to the reasonableness of any requirement of such a notice, National Grid will not, except in the case of an emergency, exercise the powers conferred by sub-paragraph (3) until the dispute has been finally determined in accordance with paragraph 39.