6.—(1) Any specified work and any protective works to be constructed by virtue of paragraph 5(4) shall, when commenced, be constructed—
(a)without unnecessary delay in accordance with the plans approved or deemed to have been approved or settled under paragraph 5;
(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
(d)so far as is reasonably practicable, so as not to interfere with or obstruct the free, uninterrupted and safe use of any railway of Network Rail or the traffic thereon and the use by passengers of railway property.
(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 approval described in sub-paragraph (1)(a) but subject to sub-paragraph (3) below, 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) Nothing in this Schedule shall impose—
(a)any liability on the undertaker with respect to any damage, costs, expenses or loss attributable to the act, neglect or default of Network Rail or its servants, contractors or agents; or
(b)any liability on Network Rail with respect to any damage, costs, expenses or loss attributable to the act, neglect or default of the undertaker or its servants, contractors or agents.