Data Protection Act 1984

1 If a circuit judge is satisfied by information on oath supplied by the Registrar that there are reasonable grounds for suspecting—

(a) that an offence under this Act has been or is being committed ; or

(b) that any of the data protection principles have been or are being contravened by a registered person,

and that evidence of the commission of the offence or of the contravention is to be found on any premises specified in the information, he may, subject to paragraph 2 below, grant a warrant authorising the Registrar or any of his officers or servants at any time within seven days of the date of the warrant to enter those premises, to search them, to inspect, examine, operate and test any data equipment found there and to inspect and seize any documents or other material found there which may be such evidence as aforesaid.