18.—(1) The undertaker may for the purposes of this Order enter on any land shown within the Order limits and—
(a)survey or investigate the land;
(b)without prejudice to the generality of sub-paragraph (a), make trial holes, trial pits and boreholes in such positions on the land as the undertaker thinks fit to investigate the nature of the surface layer and subsoil and remove soil samples;
(c)without prejudice to the generality of sub-paragraph (a), carry out ecological or archaeological investigations on such land; and
(d)place on, leave on and remove from the land apparatus for use in connection with the survey and investigation of land and making of trial holes, trial pits or boreholes.
(2) No land may be entered on or equipment placed or left on or removed from the land under paragraph (1) unless at least 14 days’ notice has been served on every owner and occupier of the land.
(3) Any person entering land under this article on behalf of the undertaker—
(a)must, if so required, before entering the land, produce written evidence of their authority to do so; and
(b)may take with them such vehicles and equipment as are necessary to carry out the survey or investigation or to make the trial holes, trial pits or boreholes.
(4) No trial holes, trial pits or boreholes may be made under this article—
(a)in land located within the highway boundary without the consent of the relevant highway authority; or
(b)in a private street without the consent of the street authority,
but such consent must not be unreasonably withheld.
(5) As soon as reasonably practicable following the exercise of any powers under paragraph (1), any apparatus must be removed and the land restored to the reasonable satisfaction of the owners of the land.
(6) The undertaker must compensate the owners and occupiers of the land for any loss or damage arising by reason of the exercise of the authority conferred by this article, such compensation to be determined, in case of dispute, under Part 1 (determination of questions of disputed compensation) of the 1961 Act.