The guidance on this page is suitable for large businesses in the public, private and third sectors. Small businesses should use the resources on our small business web hub.
A brief overview of who the UK GDPR applies to and some key definitions.
The definition of personal information and how to know whether the information you are using is personal information.
Detailed guidance about what personal information is, identifiers and related factors, directly identifying someone and the definition of "relates to".
Recordings of ICO staff training on what personal information is and some key data protection definitions, available for you to reuse.