The Information Commissioner's Office (ICO) issued a £12.5 million monetary penalty notice in October 2026 against a retail company that failed to implement adequate technical measures to protect customer payment card data. The ICO found that the company stored card numbers, expiry dates and CVV codes in plaintext databases for more than three years — a breach of Article 5(1)(f) and Article 32 of UK GDPR (Data Protection Act 2018).

The penalty is the highest issued by the ICO since the UK GDPR came into force. The Commissioner stated that storing payment credentials in plaintext is an "elementary failure" given published industry standards such as the PCI DSS framework. The company had a contractual obligation under the standard to encrypt cardholder data at rest and in transit — and did neither.

The ICO has published security guidance under UK GDPR setting out the technical and organisational measures required. Any organisation that collects, processes or stores personal data should conduct a data mapping exercise and review its encryption practices. Individuals affected by a data breach have the right to complain to the ICO at ico.org.uk/make-a-complaint and may have a claim for compensation under section 168 of the Data Protection Act 2018.