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Most Serious Cyberattacks Against the UK Now From Russia, Iran and China, Cyber Chief Will Say

Richard Horne says state-backed attacks are now the most serious threat as the NCSC handles about four significant incidents a week.

  • On Wednesday, Richard Horne, head of the U.K.'s National Cyber Security Centre , told the CyberUK conference in Glasgow that hostile nations, including Russia, Iran, and China, now pose the most serious cyber threats to Britain.
  • China's intelligence agencies display an "eye-watering level of sophistication in their cyber operations," Horne said, while Iran is "almost certainly using cyber activity to support the repression of British individuals."
  • Moscow is using tactics honed in Ukraine by "moving them beyond the battlefield," according to Horne, who pointed to "sustained Russian hybrid activity" targeting the U.K. and Europe, including the Swedish heating plant hack.
  • Organizations must understand the "full extent" of risk they face, Horne said, because businesses would likely face cyberattacks "at scale" during conflict, where they cannot pay their way out of trouble.
  • Blaise Metreweli, chief of Britain's MI6, previously described the global environment as more dangerous and contested than it has been for decades, reflecting the U.K.'s position between peace and war.
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Most serious cyberattacks against the UK now from Russia, Iran and China, cyber chief will say

The head of the U.K.'s National Cyber Security Centre warns that hostile nations like Russia, Iran and China are behind the most serious cyberattacks in the U.K.

·United States
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Winnipeg Free Press broke the news in Winnipeg, Canada on Tuesday, April 21, 2026.
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