From the Graham Cluley piece:
An unknown hacker who says they are associated with Anonymous claims to have exploited unpatched software vulnerabilities in swiftQueue’s software to steal a database containing 11 million records, including the passwords and personal data (names, birth dates, phone numbers, and email addresses) of 1.2 million NHS patients.
Read more at the link:
https://www.grahamcluley.com/anonymous-nhs-hacker/