In a wide-ranging speech, Ken McCallum also revealed MI5 had responded to 20 plots backed by Iran since 2022.
Russia's intelligence agency has been on a mission to generate "sustained mayhem on British and European streets", the head of MI5 has said.
Giving his annual update on security threats faced by the UK, Ken McCallum said GRU agents had carried out "arson, sabotage and more dangerous actions conducted with increasing recklessness" in Britain after the UK backed Ukraine in its war with Russia.
MI5 had also responded to 20 plots backed by Iran since 2022, he said, although he added the majority of its work still mostly involved Islamist extremism followed by extreme right-wing terrorism.
Chinese authorities demand schoolteachers and other public sector employees hand in their passports as President Xi Jinping tightens his grip on society
Yes, because MI5 never lie for the government do they? Famous for telling the absolute truth all the time are MI5... terrible at counterintelligence as a consequence... But at least they're honest...
Unbelievable. If the government says jump, you say...?