What is personal data under UK GDPR, and what is special category data?

What counts as personal data under the UK GDPR, with examples, what special category data is, and how pseudonymised and anonymous data are treated.

Last reviewed 3 min readBy Lift College Editorial

CPD guide

Personal data is information that relates to an identified or identifiable individual. It can be as simple as a name or a number, and can include an IP address or a cookie identifier. Special category data is personal data the UK GDPR treats as more sensitive, such as health, ethnic origin or religious beliefs, and it needs a lawful basis plus an extra condition to use. The Lift College GDPR Training course starts with what counts as personal data.

What counts as personal data

The ICO says personal data is information that relates to an identified or identifiable individual. Someone can be identified:

  • directly, from the information itself, such as a name and address
  • indirectly, by combining it with other information that you, or anyone else, could reasonably use

Identifiers can be a name, an ID number, location data, an IP address, a cookie identifier or other factors. Information also has to "relate to" the person, which depends on its content, why you are using it and its likely effect on them.

Examples

  • a customer's name, email address or phone number
  • a staff record with an employee number and pay
  • a photo or CCTV image of a person
  • notes about a learner's progress
  • an IP address or cookie ID linked to a person's browsing

Pseudonymised and anonymous data

Information with identifiers removed or replaced (pseudonymised) is still personal data. Information that is truly anonymous is not covered by the UK GDPR. Inaccurate information about a person is still personal data, because it relates to them.

What special category data is

The UK GDPR gives extra protection to personal data revealing:

  • racial or ethnic origin
  • political opinions
  • religious or philosophical beliefs
  • trade union membership

and to genetic data, biometric data used for identification, data concerning health, and data concerning a person's sex life or sexual orientation.

The ICO says these need care because using them can create significant risks to people's rights and freedoms. To use special category data you need both a lawful basis and an additional condition. Financial information can be sensitive, but it is not special category data.

Criminal offence data

Information about criminal allegations, convictions or offences is not special category data, but separate rules cover it, and it also needs a lawful basis and an additional condition.

When the UK GDPR applies

It applies to personal data processed wholly or partly by automated means, or held in a structured filing system. It does not cover processing by an individual for purely personal or household activities.

Training

Lift College GDPR Training is 2 hours in 5 modules, with a CPD Standards Office accredited certificate the same day you pass. Data Protection Training goes further on lawful bases and special data.

Frequently asked questions

What is personal data under GDPR?
Information that relates to an identified or identifiable person, directly or when combined with other information, such as a name, ID number, IP address or cookie identifier.
What is special category data?
Personal data the UK GDPR treats as more sensitive: racial or ethnic origin, political opinions, religious or philosophical beliefs, trade union membership, genetic, biometric, health, sex life and sexual orientation data.
Is an email address personal data?
Yes, when it relates to an identifiable person, such as a named work address or a personal email address.
Is pseudonymised data still personal data?
Yes. The ICO says information with identifiers removed or replaced is still personal data. Only truly anonymous information is outside the UK GDPR.
Is financial information special category data?
No. The ICO says financial information can be sensitive, but it does not count as special category data under the UK GDPR.
What do you need to use special category data?
Both a lawful basis under Article 6 of the UK GDPR and an additional condition for special category data.

Sources checked

Your next step

View the GDPR Training course

£19.99, pay once

View the courseRequest a call back

Or call 020 4652 5904 · Mon to Fri, 9am to 6pm