pattern-library 1 linked patterns checked
GOV.UK page not found pages
Documents 404 page copy, page title and H1 requirements, service contact guidance, reasons users may reach a missing page, link-testing duties, and exclusions such as breadcrumbs, jargon, humor, and red warning text.
Read with a purpose
What this source can teach
Use this source to compare a documented solution with the task and states in your own product.
- Start with the original. Open the source and find the guidance or example relevant to your task.
- Trace the connection. Use the claim notes below to see how this site applies the source to specific patterns.
- Check the setting. Compare the source's platform, people, and constraints with your own decision.
Pattern Decisions This Source Supports
| Pattern | Supported decision | Required contract | Claim note |
|---|---|---|---|
| Page not found page | Choose page not found page when the requested route, page, file, object URL, or deep link does not resolve to a valid destination. | The page loads as a stable destination instead of redirecting users without explanation. | GOV.UK documents page-not-found use cases, no-blame copy, page title and H1, contact guidance, link testing, and exclusions such as technical jargon and breadcrumbs. |
Comparisons supported by this source
- Page not found page vs service unavailable page vs error state vs empty state
GOV.UK documents page-not-found use cases, concise no-blame copy, page title and H1, contact guidance, and exclusions such as technical jargon and breadcrumbs.
Evidence Role
This source is treated as pattern-library evidence. Its value comes from the specific claims and setting described above.
Publisher: GOV.UK Design System. Last checked: .