In the event of a failure, in relation to the execution of works in land for the construction of a pipe-line, to comply with any such prohibition imposed by a notice served under subsection (1) of the last foregoing section as has effect by virtue of paragraph (a) thereof, F1the Health and Safety Executive may serve on the person who executed the works a notice requiring him to remove so much of the works as has been executed without compliance with the prohibition or, if he so elects, to effect such alterations thereto as may be necessary to make them comply with the prohibition; and in the event of a failure, in relation to the execution of works in land for the construction of a pipe-line, to comply with any such prohibition imposed by a notice served under subsection (1) of the last foregoing section as has effect by virtue of paragraph (b) or (c) thereof, F1the Executive may serve on the owner of the line a notice requiring him to remove so much of the line as has been constructed without compliance with the prohibition or, if he so elects, to effect such alterations thereto as may be necessary to comply with the prohibition.

If a person on whom a notice is served under the foregoing subsection fails, before the expiration of six weeks from the date on which the notice was served, or such longer period as F1the Executive may on his application allow, to comply with the requirement imposed by the notice, F1the Executive may enter and remove any works or length of line with respect to which default has been made, or effect such alterations thereto as he deems necessary, and may recover from the person in default, in any court of competent jurisdiction, the expenses reasonably incurred by F1the Executive in so doing.

Where, in consequence of compliance with a requirement imposed by a notice served on a person under subsection (1) of this section or of the exercise, in consequence of the failure of a person on whom such a notice is served to comply with a requirement imposed thereby, of the power conferred by the last foregoing subsection, a person, other than the person on whom the notice was served, suffers loss by reason of damage to, or disturbance in the enjoyment of, any land or chattels, he shall be entitled, where the loss was suffered in consequence of such compliance, to compensation in respect of that loss from the person on whom the notice was served, or, where the loss was suffered in consequence of the exercise of that power, to compensation in respect of that loss from F1the Executive; and F1the Executive may recover from the person on whom the notice was served, in any court of competent jurisdiction, the amount of any compensation paid by F1the Executive under this subsection.

Subsection (1) of section five of this Act shall have effect where a notice is served under subsection (1) of this section as it has effect where a notice is served under section four of this Act with the substitution, for the reference to the removal of the works required by the notice to be removed, of a reference to the removal of the works or length of line required by the notice to be removed.

The service of a notice under subsection (1) of this section in consequence of any such failure as is therein mentioned shall be without prejudice to the taking of proceedings under subsection (3) of the last foregoing section in respect of the failure.