Article 19 Site inspections
The inspector may make an unaccompanied inspection of the land before or during an inquiry without giving notice of that intention to the persons entitled to take part in the inquiry.
During an inquiry or after its close, the inspector—
may inspect the land in the company of the appellant, the local planning authority and, in the case of an enforcement appeal, any person on whom a copy of the enforcement notice has been served; and
must make such an inspection if so requested by the appellant or the local planning authority before or during an inquiry.
In all cases where the inspector intends to make an accompanied site inspection, the inspector must announce during the inquiry the date and time at which the inspector proposes to make it.
The inspector may (but is not required 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.