(1) Subsection (2) applies if a constable reasonably suspects that a vehicle is being used for the purposes of terrorism.
(2) The constable may stop and search -
(a) the vehicle;
(b) the driver of the vehicle;
(c) a passenger in the vehicle;
(d) anything in or on the vehicle or carried by the driver or a passenger;
to discover whether there is anything which may constitute evidence that the vehicle is being used for the purposes of terrorism.
(3) A constable may seize and retain anything which the constable -
(a) discovers in the course of a search under this section, and
(b) reasonably suspects may constitute evidence that the vehicle is being used for the purposes of terrorism.
(4) A person who has the powers of a constable in one Part of the United Kingdom may exercise a power under this section in any Part of the United Kingdom.
(5) In this section “driver”, in relation to an aircraft, hovercraft or vessel, means the captain, pilot or other person with control of the aircraft,
…