Terrorism Act 2006

17 Commission of offences abroad

(1) If—

(a) a person does anything outside the United Kingdom, and

(b) his action, if done in a part of the United Kingdom, would constitute an offence falling within subsection (2),

he shall be guilty in that part of the United Kingdom of the offence.

(2) The offences falling within this subsection are—

(a) an offence under section 1 or 6 of this Act so far as it is committed in relation to any statement, instruction or training in relation to which that section has effect by reason of its relevance to the commission, preparation or instigation of one or more Convention offences;

(b) an offence under any of sections 8 to 11 of this Act;

(c) an offence under section 11(1) of the Terrorism Act 2000 (c. 11) (membership of proscribed organisations);

(d) an offence under section 54 of that Act (weapons training);

(e) conspiracy to commit an offence falling within this subsection;

(f) inciting a person to commit such an offence;

(g) attempting to commit such an offence;

(h) aiding, abetting, counselling or procuring the commission of such an offence.

(3) Subsection (1) applies irrespective of whether the person is a British citizen or, in the case of a company, a company incorporated in a part of the United Kingdom.

(4) In the case of an offence falling within subsection (2) which is committed wholly or partly outside the United Kingdom—

(a) proceedings for the offence may be taken at any place in the United Kingdom; and

(b) the offence may for all incidental purposes be treated as having been committed at any such place.

(5) In section 3(1)(a) and (b) of the Explosive Substances Act 1883 (c. 3) (offences committed in preparation for use of explosives with intent to endanger life or property in the United Kingdom or the Republic of Ireland), in each place, for “the Republic of Ireland” substitute “elsewhere”.

(6) Subsection (5) does not extend to Scotland except in relation to—

(a) the doing of an act as an act of terrorism or for the purposes of terrorism; or

(b) the possession or control of a substance for the purposes of terrorism.