British Foreign Secretary Boris Johnson has vowed that Britain will respond "robustly" if evidence of state responsibility emerges after a Russian double agent was left fighting for his life following suspected exposure to an unknown substance.

The Tunisia beach massacre is linked to a previous terror attack in the country, British police believe.

David Cameron has urged schools to recognise their role in the “fight against Islamist extremist terror” as police urgently try to trace three girls believed to have fled to Syria to join Islamic State.

Islamic cleric Abu Hamza has been sentenced to life in prison for plots to kidnap tourists in Yemen in 1998 and build a terrorist training camp in Oregon.