Open prisons and Category D in our listings
20 March 2026Counts and labels reflect published prison listing information. They are not live government data.
Thematic graphic — not a photograph of a named facility.
Open conditions are sensitive to regime and category. Our site reflects published listing details only.
Open prisons collection
Our open-prisons thematic list includes Category D sites and establishments whose predominant function text references open conditions where the published text supports it. 13 establishments currently match that collection.
Figures and labels on Prisons Online come from published HMPPS prison information. Security category and function wording are administrative fields in that source (and category may be inferred where the export does not map cleanly). Always confirm visiting rules, contact details, and regime information with official HMPPS or GOV.UK sources.
Frequently asked questions
- Does appearing here mean someone can self-report?
- No. Placement and licensing decisions are made by HMPPS. This page only describes how we group published administrative data.