There have been at least 10 potential threats by Iran to kidnap or kill British or UK-based people this year.
The figure was revealed by the head of MI5, Ken McCallum, in his annual update on threats facing the UK.
Mr McCallum also warned the UK “must be ready for Russian aggression for years to come”.
But he said Russia had suffered a strategic setback after a mass expulsion of its spies around the world in the wake of its invasion of Ukraine.
