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Iran's Hostile State Activity Against the UK

MI5's chief has warned that Iran is escalating covert attacks in the UK, including plots against military sites and sabotage of Jewish sites, expanding beyond its traditional targeting of dissidents.

Importance: 65%Confidence: 65%Mentions: 1Updated: October 14, 2026Page history (1 revision) →

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MI5 chief Ken McCallum warned on Tuesday that Iran is trying to hit military sites in the UK, and that a suspected plot to attack a US-run military airbase in September was "not unique" (SCMP, October 13). McCallum said Tehran is seeking to intensify attacks in Britain beyond its traditional targets of Iranians opposed to the country's Islamic authorities, including arson and sabotage attacks on Jewish sites that Britain says were carried out by Iran-linked actors (SCMP, October 13). The warning signals an escalating pattern of Iranian state-linked covert action on UK soil, with implications for Western security policy and UK-Iran relations.