Terrorism Act 2000

21 Cooperation with police

(1) A person does not commit an offence under any of sections 15 to 18 if he is acting with the express consent of a constable.

(2) Subject to subsections (3) and (4), a person does not commit an offence under any of sections 15 to 18 by involvement in a transaction or arrangement relating to money or other property if he discloses to a constable—

(a) his suspicion or belief that the money or other property is terrorist property, and

(b) the information on which his suspicion or belief is based.

(3) Subsection (2) applies only where a person makes a disclosure—

(a) after he becomes concerned in the transaction concerned,

(b) on his own initiative, and

(c) as soon as is reasonably practicable.

(4) Subsection (2) does not apply to a person if—

(a) a constable forbids him to continue his involvement in the transaction or arrangement to which the disclosure relates, and

(b) he continues his involvement.

(5) It is a defence for a person charged with an offence under any of sections 15(2) and (3) and 16 to 18 to prove that—

(a) he intended to make a disclosure of the kind mentioned in subsections (2) and (3), and

(b) there is reasonable excuse for his failure to do so.

(6) Where—

(a) a person is in employment, and

(b) his employer has established a procedure for the making of disclosures of the same kind as may be made to a constable under subsection (2),

this section shall have effect in relation to that person as if any reference to disclosure to a constable included a reference to disclosure in accordance with the procedure.

(7) A reference in this section to a transaction or arrangement relating to money or other property includes a reference to use or possession.