to provide him with any facilities, information, documents or records, or other assistance, that he may reasonably request. An authorised officer exercising a power of entry by virtue of this Article shall, if so required, produce evidence of his authorisation before entering the premises; or at any time before leaving the premises. If an authorised officer exercises the power to take samples, he shall: leave a notice at the premises with a responsible person (or, if that is impracticable, fix the notice in a prominent position at the premises) giving particulars of the article or substance and stating that he has taken a sample of it, and if it is practicable to do so, give to a responsible person at the premises a portion of the sample marked in a manner sufficient to identify it. If an authorised officer exercises the power to take possession of an article or substance, he shall leave a notice at the premises with a responsible person (or, if that is impracticable, fix the notice in a prominent position at the premises) giving particulars of the article or substance and stating that he has taken possession of it. An authorised officer, exercising these powers of entry, who enters premises which are unoccupied, or from which the occupier is temporarily absent, shall on departure ensure that all reasonable measures have been taken to leave the premises as effectively secured against unauthorised entry as he found them. See also Law enforcement in the United Kingdom References Fire and rescue in the United Kingdom