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Britain ‘must brace for more Iranian cyber attacks’

Former US security chief expects UK infrastructure to be targeted again, following unprecedented breach of power plant

Rozina Sabur, National Security Editor, Telegraph, 29 August 2026

nfrastructure could face further attacks from Iran, a former US cyber chief has warned.

The Telegraph revealed last week that hackers affiliated with Tehran shut down a British power plant for four days in an unprecedented cyber attack.

And Britain, the US and other Western allies should “expect attacks like this to continue” as Tehran ramps up its cyber warfare, according to Jen Easterly, the former director of the US cybersecurity and infrastructure security agency (CISA).

In an interview with The Telegraph, Ms Easterly said companies that failed to heed alerts from the Five Eyes intelligence network in particular would be seen as “low-hanging fruit”. Five Eyes is an alliance between Australia, Canada, New Zealand, the UK and the US……………………

With Tehran under growing diplomatic and economic pressure amid its confrontation with the US and Israel, the regime has dramatically stepped up its cyber attacks on the West.

Intelligence officials describe Iran as a capable adversary in the online domain, with its cyber apparatus working in concert with its wartime aims.

In the incident revealed by The Telegraph last week, hackers affiliated with the Iranian regime succeeded in closing down an energy facility in the UK…………

The shutdown is understood to have occurred at the same time as a series of attacks on US water infrastructure last month, which affected multiple states……………………………………. https://www.telegraph.co.uk/news/2026/08/29/britain-must-brace-for-more-iranian-cyber-attacks/

September 1, 2026 - Posted by Christina Macpherson | safety, UK