Weights and Measures Act 1985

2 If a justice of the peace, on sworn information in writing—

(a) is satisfied that there is reasonable ground to believe that—

(i) a package or a thing containing a package, or

(ii) any such equipment, record, document or certificate as is mentioned in paragraph 1 above,

is on any premises or that an offence under section 50 or 63 of this Act is being or is about to be committed on any premises, and

(b) is also satisfied either—

(i) that admission to the premises has been refused or that a refusal is apprehended and that notice of the intention to apply for a warrant has been given to the occupier, or

(ii) that an application for admission or the giving of such a notice would defeat the object of the entry or that the premises are unoccupied or that the occupier is temporarily absent and it might defeat the object of the entry to await his return,

the justice may by warrant under his hand, which shall continue in force for a period of one month, authorise an inspector to enter the premises if need be by force.

In the application of this paragraph to Scotland " justice of the peace " includes a sheriff.