Iran-linked hackers shut down UK power plant for four days

Iran-linked hackers shut down a British power plant for four days in July 2026, according to a report in the Telegraph. The attack, which was not publicly disclosed until August, affected a relatively small generator and did not impact the wider grid.

Security experts have questioned why recovery took four days and warned that the attack could be repeated at scale. Check Point’s Graeme Stewart called it a grave escalation in the Iran conflict, while Huntress’s Muhammad Yahya Patel and Dragos’s Phil Tonkin highlighted the resilience and repeatability concerns.

The incident is part of a broader pattern of Iranian cyberattacks on critical infrastructure in the US, Israel, and Europe since the outbreak of the war with the US and Israel. The UK’s National Cyber Security Centre has not commented publicly.