55.The Criminal Justice (Terrorism and Conspiracy) Act 1998 (c. 40) made it an offence to conspire in the United Kingdom to commit criminal acts abroad. These sections similarly make it an offence for a person in the United Kingdom to incite terrorist acts abroad.
56.The offence of incitement to specific acts commonly associated with terrorism (such as hostage taking or hijacking aircraft) is already available, by virtue of the extra-territorial jurisdiction established over such offences in the past – and elsewhere in this Act – in legislation implementing various international counter-terrorism Conventions. This provision will, therefore, fill in remaining gaps in the law.
Commentary Part Vi: Miscellaneous Sections 59–61: Inciting terrorism: England and Wales, Scotland, and Northern Ireland