ICO Fines South Staffordshire Water £963,900 Over Cl0p Ransomware Attack and Data Breach – May 2026
The UK Information Commissioner's Office (ICO) fined South Staffordshire Water £963,900 ($1.3 million) on 11 May 2026 for a Cl0p ransomware attack that allowed hackers to remain undetected on the company's network for nearly two years. The breach resulted in the personal data of 633,887 customers and employees being published in August 2022. The incident highlights significant cybersecurity vulnerabilities in UK critical water infrastructure.
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Impact verdict
Medium impact. The fine of nearly £1 million and exposure of over 633,000 individuals' data represents a significant regulatory and reputational event for a UK critical infrastructure operator; cyber and liability insurers covering water utilities face potential claims exposure from similar incidents.
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