Doesn't it?
Terrorism Act section 117. Consent to prosecution
(2) Proceedings for an offence to which this section applies—
(a)shall not be instituted in England and Wales without the consent of the Director of Public Prosecutions, and
(b)shall not be instituted in Northern Ireland without the consent of the Director of Public Prosecutions for Northern Ireland.
(2A) But if it appears to the Director of Public Prosecutions or the Director of Public Prosecutions for Northern Ireland that an offence to which this section applies * has been committed outside the United Kingdom or for a purpose wholly or partly connected with the affairs of a country other than the United Kingdom, his consent for the purposes of this section may be given only with the permission—
(a)in the case of the Director of Public Prosecutions, of the Attorney General; and
(b)in the case of the Director of Public Prosecutions for Northern Ireland, of the Advocate General for Northern Ireland.
* The section applies to most "terrorism" offences including support for a proscribed organisation.