ISIS and al Qaeda present a “resurgent” threat to the United Kingdom, the head of the country’s domestic security service warned in a rare public intervention on Tuesday, as he outlined a changing landscape of terrorism that is increasingly relying on children and on the internet.

Threats to the UK from Russia and Iran and the danger posed by the Islamic State group have increased in recent months, according to the head of Britain’s domestic spy agency.

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The UK's domestic intelligence agency head said that the number of state-threat investigations undertaken by his agency had risen by 48% over the past year with Iran, Russia and China to blame. View o

Ken McCallum says Russian intelligence agencies are also on a ‘sustained mission to generate mayhem on British and European streets’ with ‘arson, sabotage and more’