Prevention of Terrorism (Temporary Provisions) Act 1989

18 Information about acts of terrorism

(1) A person is guilty of an offence if he has information which he knows or believes might be of material assistance—

(a) in preventing the commission by any other person of an act of terrorism connected with the affairs of Northern Ireland; or

(b) in securing the apprehension, prosecution or conviction of any other person for an offence involving the commission, preparation or instigation of such an act,

and fails without reasonable excuse to disclose that information as soon as reasonably practicable—

(i) in England and Wales, to a constable;

(ii) in Scotland, to a constable or the procurator fiscal; or

(iii) in Northern Ireland, to a constable or a member of Her Majesty’s Forces.

(2) A person guilty of an offence under this section is liable—

(a) on conviction on indictment, to imprisonment for a term not exceeding five years or a fine or both;

(b) on summary conviction, to imprisonment for a term not exceeding six months or a fine not exceeding the statutory maximum or both.

(3) Proceedings for an offence under this section may be taken, and the offence may for the purposes of those proceedings be treated as having been committed, in any place where the person to be charged is or has at any time been since he first knew or believed that the information might be of material assistance as mentioned in subsection (1) above.