If an officer of a local housing authority enters premises under section 118(1) and finds one or more occupiers on the premises, the officer must—
produce evidence of the officer's identity and authority to that occupier or (if there is more than one) to at least one of them, and
if the entry takes place otherwise than in the course of a routine inspection, provide to that occupier or (if there is more than one) to at least one of them a document that—
sets out why the entry is necessary, and
indicates the nature of the offences under section 131(1) and (2).
An officer need not comply with subsection (1) if it is not reasonably practicable to do so.
Proceedings resulting from the exercise of the power under section 118(1) are not invalid merely because of a failure to comply with subsection (1).