GDPR Special Category Data

What Is Special Category Data?

Under the UK GDPR, special category data is personal data that requires additional protection because of its sensitive nature. Processing this data carries higher risks to the fundamental rights and freedoms of individuals — which is why the regulation imposes stricter conditions on when and how it can be used.

The UK GDPR identifies the following categories as special category data:

When Can You Process Special Category Data?

You cannot process special category data unless you can identify both a lawful basis under Article 6 of the UK GDPR and a separate condition under Article 9. The ten conditions for processing special category data are:

• ●Explicit consent from the individual
• ●Necessary for employment, social security or social protection law obligations
• ●Necessary to protect vital interests where the individual cannot give consent
• ●Processing by a not-for-profit body with appropriate safeguards
• ●Personal data manifestly made public by the individual
• ●Necessary for legal claims or judicial proceedings
• ●Necessary for reasons of substantial public interest
• ●Necessary for health or social care purposes
• ●Necessary for public health purposes
• ●Necessary for archiving, research or statistical purposes

Special Category Data in Practice

Healthcare organisations routinely process health data. HR departments process data about ethnic origin, disability, and trade union membership. Any organisation with occupational health records, diversity monitoring, or biometric access systems is likely processing special category data — often without realising the full extent of their obligations.

Failing to apply the correct safeguards to special category data can result in significant GDPR fines. The ICO takes a particularly serious view of breaches involving sensitive data, especially health records and children's data.

Protecting Special Category Data

• ●Conduct Data Protection Impact Assessments (DPIAs) before processing
• ●Implement strong access controls — restrict access to authorised personnel only
• ●Encrypt special category data at rest and in transit
• ●Maintain detailed records of processing activities (ROPA)
• ●Apply data minimisation — only collect what is genuinely necessary
• ●Train staff on the heightened requirements for sensitive data