Public Health Act 2016

An authorised officer may apply to a judicial officer for a warrant in respect of any premises —

if the authorised officer reasonably suspects that there is, or may be within the next 72 hours, a particular thing (including a document) that may provide evidence that an offence under this Act has been committed or is being committed; or

otherwise for the purposes of exercising powers under section 240.

An authorised officer may apply for a warrant in respect of any premises even if the authorised officer has power to enter the premises without a warrant.