25.—(1) The inspector may make an unaccompanied inspection of any site to which the order or scheme relates before or during an inquiry without giving notice of his intention to the persons specified in rule 13(1) or 22(1).
(2) The inspector may, during an inquiry or after its close, inspect such a site in the company of a representative of the promoting authority and any statutory objector; and he shall make such an inspection if so requested by the promoting authority or by any statutory objector before or during an inquiry.
(3) In all cases where the inspector intends to make an inspection of the kind referred to in paragraph (2) he shall announce during the inquiry the date and time at which he proposes to make it.
(4) The inspector shall not be bound to defer an inspection of the kind referred to in paragraph (2) where any person mentioned in that paragraph is not present at the time appointed.