Paragraph 4 Conditions for warrants
United Kingdom
The conditions are—
(a)
entry to the premises has been, or is likely to be, refused and notice of the intention to apply for a warrant has been given to the occupier;
(b)
asking for admission to the premises, or giving such a notice, would defeat the object of the entry;
(c)
entry is required urgently;
(d)
the premises are unoccupied or the occupier is temporarily absent.