173.—(1) Any specified work must, when commenced, be constructed—
(a)without unnecessary delay in accordance with the plans approved or deemed to have been approved or settled under paragraph 172;
(b)under the supervision (where appropriate and if given) and to the reasonable satisfaction of Peel;
(c)in such manner as to cause as little damage as is possible to relevant property; and
(2) If any damage to relevant property or any such interference or obstruction is caused by the carrying out of the construction of a specified work, the undertaker must, notwithstanding any such approval, make good such damage and must pay to Peel all reasonable and proper expenses to which Peel may be put and compensation for any loss which it may sustain by reason of any such damage, interference or obstruction provided that the undertaker shall only be liable up to a maximum of £20,000,000.
(3) Nothing in this Part imposes any liability on the undertaker with respect to any damage, costs, expenses or loss attributable to the negligence of Peel or its servants, contractors or agents or any liability on Peel with respect of any damage, costs, expenses or loss attributable to the negligence of the undertaker or its servants, contractors or agents.