Khairi Saadallah, 26, shouted 'Allahu akhbar' as he fatally stabbed friends James Furlong, Dr David Wails, and Joseph Ritchie-Bennett, on June 20 last year.
Rómulo Costa and Cassimo Turé have been jailed in Portugal for supporting a network that delivered people from Britain and Portugal to Syria to fight for Daesh.
The UK has been raised to the fourth highest terror level.