The Terrorism Act 2000 (c. 11)
1
An offence under— section 11 (membership of a proscribed organisation), section 12 (inviting support for a proscribed organisation), section 54 (weapons training), section 56 (directing a terrorist organisation), section 57 (possession of article for terrorist purposes), section 58 (collection of information likely to be of use to a terrorist), section 58A (publishing information about members of the armed forces etc), section 58B (entering or remaining in a designated area), or section 59 (inciting terrorism overseas).