Here is a starter for 10!
https://listverse.com/2016/10/01/10-left-wing-terrorist-organizations-from-around-the-world/
I imagine the security forces keep a close tab on corbyn and his little mates as well.
It will be a glorious sunny fdaty when outfits like Unite and Momentum are proscribed. After all Unite cannot be both a rabid political organisation and also act for the best interests of the members of Amicus and the Transport and General Workers' Union.