(1) This section applies where a person has information which he knows or believes might be of material assistance-

(a) in preventing the commission by another person of an act of terrorism, or

(b) in securing the apprehension, prosecution or conviction of another person, in the United Kingdom, for an offence involving the commission, preparation or instigation of an act of terrorism.

(2) The person commits an offence if he does not disclose the information as soon as reasonably practicable in accordance with subsection (3).

(3) Disclosure is in accordance with this subsection if it is made-

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

(b) in Scotland, to a constable, or

(c) in Northern Ireland, to a constable or a member of Her Majesty's forces.