No Warrant Needed
Search and seizure
(1) This section applies where a constable reasonably suspects that a person ("the suspect") is committing or has committed an offence under Part 1 of this Act.
(2) If the constable reasonably believes that evidence of the offence is likely to be found on the suspect, the constable may stop the suspect and search him.
(3) If the constable reasonably believes that evidence of the offence is likely to be found on or in a vehicle, animal or other thing of which the suspect appears to be in possession or control, the constable may stop and search the vehicle, animal or other thing.
(4) A constable may seize and detain a vehicle, animal or other thing if he reasonably believes that-
(a) it may be used as evidence in criminal proceedings for an offence under Part 1 of this Act, or
(b) it may be made the subject of an order under section 9.
(5) For the purposes of exercising a power under this section a constable may enter-
(b) premises other than a dwelling;
(c) a vehicle.
(6) The exercise of a power under this section does not require a warrant.
Well it is a serious crime and so old fashioned niceties have no place in a modern society....