22.—(1) Any specified work and any protective works to be constructed by virtue of paragraph 21(4) shall, when commenced be constructed—
(a)with all reasonable dispatch in accordance with the plans approved or deemed to have been approved or settled under paragraph 21;
(b)under the supervision (where appropriate and if given) and to the reasonable satisfaction of the engineer;
(c)in such manner as to cause as little damage as is possible to railway property and as little interference as may be with the conduct of traffic on the railways of Network Rail.
(2) If any damage to railway property or any such interference or obstruction shall be caused by the carrying out of, or in consequence of the construction of a specified work, the undertaker shall, notwithstanding any such approval, make good such damage and shall pay to Network Rail all reasonable expenses to which Network Rail may be put and compensation for any loss which it may sustain by reason of any such damage, interference or obstruction.
(3) Without prejudice to any other operational railway requirement, the undertaker shall give to the engineer not less than 180 days' notice of its intention to commence the construction of a specified work and also, except in emergency (when it shall give such notice as may be reasonably practicable), of its intention to carry out any works for the maintenance or repair of a specified work in so far as such work of repair or maintenance may affect railway property.