Britain’s leading role in NATO’s war against Russia in Ukraine and the military targeting of Iran ensured that McCallum’s remarks led the front pages of four major UK newspapers.

In a rare public speech setting out the major threats to the United Kingdom, Ken McCallum argued that hostile states, radicalized individuals, and a revived Islamic State group have combined to create “the most complex and interconnected threat environment we’ve ever seen.

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.

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 on

MI5 warns that Russia's intelligence agency is attempting to incite chaos in the U.K., particularly following the U.K.'s support for Ukraine.