Record Yield
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Privacy & law26 October 2026 · 2 min read

Personal data that must never leave: a checklist

Some records are too sensitive to license at all, and UK GDPR names most of them.

✕Health and medical data✕Racial or ethnic origin✕Political opinions✕Religious or philosophical beliefs✕Trade union membership✕Genetic and biometric data✕Sex life or sexual orientation✕Criminal offence data✕Children's data✕HR, grievance and DMs
Exclude by default

Where the list comes from

  • Article 9 UK GDPR: special category data.
  • Article 10: criminal offence data.
  • Good practice: children's data, HR files and private messages.

How we enforce it

Exclusions are agreed system by system before processing starts, then checked again when the output is tested. See data safety.

Key takeaways
  • Special category data stays out.
  • Private and HR messages excluded by default.
  • Check exclusions again at testing.
Sources
  • UK GDPR Articles 9 and 10

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