By Gordon Corera
Security correspondent, BBC News
There person been astatine slightest 10 imaginable threats by Iran to kidnap oregon termination British oregon UK-based radical this year.
The fig was revealed by the caput of MI5, Ken McCallum, successful his yearly update connected threats facing the UK.
Mr McCallum besides warned the UK "must beryllium acceptable for Russian aggression for years to come".
But helium said Russia had suffered a strategical setback aft a wide expulsion of its spies astir the satellite successful the aftermath of its penetration of Ukraine.
"No 1 should beryllium nether immoderate illusion astir the breadth and assortment of the threats we look successful 2022," Mr McCallum told an assemblage wrong Thames House, the information service's London headquarters.
He warned the biggest shifts his work was seeing came successful threats posed by different states who were "not squeamish astir the tactics they deploy".
Iran projected threats "directly" successful the UK done its "aggressive quality services", helium said.
This included ambitions to kidnap oregon adjacent termination British oregon UK-based radical perceived arsenic enemies of the regime, helium said.
"We person seen astatine slightest 10 specified imaginable threats since January alone," helium revealed.
Last week it emerged that Iranian journalists based successful the UK had received warnings from the constabulary astir imaginable risks to their lives.
Mr McCallum said MI5 had been moving with home and planetary partners to disrupt what helium called "completely unacceptable activity".
He said helium could not supply further details of the imaginable plots but said Iran had sometimes operated utilizing their ain spies and sometimes others to enactment connected their behalf utilising a operation of tactics, sometimes taking actions wrong Western countries and sometimes trying to lure radical backmost to Iran.
He said the country's willingness to undertake "reckless" actions had been seen crossed Europe successful caller years.
The MI5 caput said Iran had besides been providing enactment to Russia, including by supplying drones which, helium said, had been "inflicting misery" successful Ukraine.
He warned Russia's penetration of Ukraine had been "raising nationalist information questions immoderate thought consigned to the past books".
Moscow volition proceed to usage a substance of covert threats - similar spies and cyber-attacks - arsenic good arsenic much unfastened means similar unit connected vigor prices and disinformation to people the UK, helium warned. "They volition support attacking us."
But the MI5 caput sounded an optimistic enactment connected the quality of countries to marque it harder for Russia's spies to operate.
More than 600 Russian officials person been expelled astir the satellite since the penetration of Ukraine successful February and much than 400 are believed to beryllium spies, Mr McCallum revealed. "This has struck the astir important strategical stroke against the Russian quality services successful caller European history."
In the UK, 23 Russian spies posing arsenic diplomats had been expelled. But successful summation immoderate 100 much Russians person been denied diplomatic visas connected nationalist information grounds to regenerate them, helium said.
"We should not beryllium complacent," the MI5 caput added. "We request to beryllium prepared to expect Russian aggression covertly and overtly against the UK successful the years to come."
He warned China was a "large and enduing challenge" utilizing "all means astatine their disposal" to show and sometimes intimidate those considered opponents.
Recently a pro-democracy protester was attacked astatine the Chinese consulate successful Manchester.
"We're seeing further indications of that repression," the MI5 main said, adding this was extending beyond the reports of overseas constabulary stations into different ways of applying unit connected those challenging Beijing.
"To intimidate and harass UK nationals oregon those who person made the UK their location cannot beryllium tolerated," Mr McCallum said.
In January, MI5 issued an antithetic interference alert astir Chinese attempts to power UK authorities and Mr McCallum said Chinese quality services continued to effort to power nationalist life, including by recruiting imaginable agents aboriginal connected successful their careers, for lawsuit arsenic section councillors oregon earlier they had go parliamentary candidates.
Terrorism remained a threat, helium said, though it was not arsenic acute arsenic a fewer years ago.
Since 2017, MI5 and the constabulary had disrupted 37 late-stage onslaught plots, helium said, a emergence of 8 since his update connected threats past year.
These were a premix of Islamist and utmost right-wing terrorism.
On the latter, helium said MI5 was seeing a increasing fig of close helping extremist influencers operating globally and amplifying conspiracy theories.
He said MI5 was inactive seeing planetary panic groups trying to regroup and besides what helium called "the wicked occupation of self-initiated lone histrion terrorists, fiendishly hard to observe and disrupt".
A interest is the maturation successful attempts to get firearms, including homemade and 3-D printed weapons.