Power to construct and maintain ancillary works
5.—(1) Subject to paragraph (4), the undertaker may carry out and maintain such of the following works as may be necessary or expedient for the purposes of, or for purposes ancillary to, the construction of the scheduled work, namely—
(a)works to alter the position of apparatus, including mains, sewers, drains and cables;
(b)works to alter the course of, or otherwise interfere with, a watercourse;
(c)landscaping and other works to mitigate any adverse effects of the construction, maintenance or operation of the scheduled work;
(d)works for the benefit or protection of premises affected by the scheduled work.
(2) Subject to paragraph (4), the undertaker may carry out such other works (of whatever nature) as may be necessary or expedient for the purposes of, or for purposes ancillary to, the construction of the scheduled work.
(3) Subject to paragraph (4), the undertaker may in particular within the land specified in column (1) of Schedule 2 (additional works) carry out and maintain any works specified in column (2) of that Schedule with all necessary works and conveniences in connection with those works.
(4) Paragraphs (1) to (3) shall only authorise the carrying out or maintenance of works outside the limits of deviation if such works are carried out within the further limits.