Key Facts

• A cyber attack caused a small power plant in the UK to shut down for four days.
• The attack happened last month and was linked to hackers connected to the Iranian government.
• The affected power plant was a small generator, not a major or essential energy service.
• The UK government and National Cyber Security Centre did not share detailed information about the site.
• There was no risk to the wider UK energy system during the attack.
• The UK has many small gas generators to provide extra power when needed.
• The government is updating cyber security rules and planning a new energy resilience strategy for later in the year.
• Iran is known to have strong cyber capabilities, but major cyber attacks involving Iran have been limited so far this year.