Tuesday, October 13, 2026
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UK Security Threats From Foreign Adversaries Quadruple Over Decade

Sir Ken McCallum, head of MI5's intelligence, warned about growing threats from Russia and Iran.

MI5 chief warns of threats to UK from Russia, Iran and AI
Source: BBC News World

MI5's head of intelligence has sounded a warning about the growing threats to the UK from foreign adversaries, particularly Russia and Iran.

According to Sir Ken McCallum, the number of threats from abroad has quadrupled over the last decade, with Russia being identified as the primary aggressor. This escalating threat level has prompted MI5 to devote more resources to countering state-sponsored attacks than ever before, even surpassing the levels seen during the Cold War era.

One area of concern is the increasing aggression by Iran against Jewish sites and military bases in the UK. Sir Ken emphasized that this trend poses a significant challenge for intelligence agencies like MI5, which must remain vigilant to prevent such attacks from occurring.

The use of artificial intelligence (AI) has also become a major factor in the cyber-security landscape, with Sir Ken describing it as "supercharging the contest between attackers and defenders. This development is particularly concerning given Russia's ongoing efforts to wage hybrid warfare against its adversaries.

MI5's chief warned that extremist groups are using AI to develop new bioweapons, posing a significant threat to global security. He also highlighted the growing concern of right-wing terrorism, which MI5 is working to counter through various means, including the use of technology such as drones.

The shift in focus towards countering state threats and terrorism has led to a significant increase in resources devoted to these areas. According to Sir Ken, this represents a huge shift" from previous years, with work in these fields now being on an equal scale.

The UK's security landscape has become increasingly complex, with Russia employing proxies to carry out attacks despite consistently denying involvement.

These proxy operations often rely on paying individuals or groups to conduct malicious activities, a tactic that appears to be gaining traction in the face of MI5's efforts to identify and expel Russian spies from British soil.

The scale of these expulsions has left the Kremlin with limited options for covert action, forcing it to compensate by using paid operatives to carry out attacks on its behalf.

The ongoing debate about Russian interference in UK affairs has left MI5's chief concerned that the nation may inadvertently play into Moscow's hands by amplifying its adversaries' influence.

Sir Ken emphasized that this worry stems from a fear of escalating tensions unnecessarily, allowing Russia to appear more formidable than it actually is. He warned against giving undue attention to perceived threats, suggesting that this could create an exaggerated narrative around Russian activities in the UK.

Meanwhile, MI5's chief highlighted Iran as another country expanding its hybrid campaign within British borders. In the past year alone, there have been 50 arrests linked to Iranian activities, with a significant portion of these cases targeting Jewish communities and military sites.

The recent incident at RAF Fairford, where three suspicious vans were spotted near the airbase in Gloucestershire, has sparked concerns about Iran's growing interest in UK territory. While Sir Ken did not directly mention the specific case during his speech, he noted that Iranian activities extend beyond this single incident, with a broader interest in British military sites and communities.

The National Security Act, a 2023 law aimed at countering foreign powers' interference in UK interests, has seen significant use since its introduction. The legislation has been employed to tackle threats from multiple countries, including China, Iran, and Russia.

The growing threat posed by artificial intelligence (AI) is also a major concern for the UK's security agencies. According to Sir Ken, AI can be used to produce tailored propaganda and radicalizing material that targets individuals specifically.

Terrorists have been seeking to exploit AI to improve their reconnaissance and attack methodologies, with the added menace of AI-enabled drones posing a new threat. The use of AI in bioweapon development is also a pressing concern, although this threat has not yet been realized.

The UK's Intelligence Community, comprising MI5, GCHQ, and MI6, is working closely with the globally respected AI Security Institute to address these emerging threats. This collaboration aims to separate fact from fiction and assess the true risks posed by AI.

Sir Ken emphasized that human history has provided no precedent for facing an adversary that is more intelligent than us, and that the unknown threats posed by AI require a concerted effort to mitigate. In response, MI5 has launched an AI Threat Assessment Centre to evaluate sources and provide a clearer understanding of this complex issue.

The threat landscape facing the UK is becoming increasingly complex, with multiple sources of potential danger emerging. Islamist groups such as Al Qaeda and so-called Islamic State continue to direct and inspire attacks, while extreme right-wing terrorism has also seen a significant increase.

This rise in extremist ideology is often linked to anti-immigration and anti-Muslim sentiment, which can quickly escalate into terrorist intent. In fact, Sir Ken noted that the most notable trend over the past year has been the shift towards extremist views on these issues. This worrying development is compounded by the influence of the internet, which seems to be driving young people in particular towards radicalized extreme right-wing ideologies.

The case of a 13-year-old British boy who was investigated for radicalization is a stark example of this trend. The investigation provided valuable insight that helped prevent a lethal attack on foreign soil, demonstrating the importance of vigilance and international cooperation in combating these threats.

Facts based on reporting originally published by BBC News World.

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