{"metric":"detention_population","title":"People in immigration detention","topic":"migration","unit":"people","measure_type":"stock","geography":"K02000001","comparison_method":"year_on_year","latest":{"period_start":"2025-07-01","period_end":"2026-06-30","period_label":"Year ending June 2026","value":2152,"status":"provisional","vintage":"2026-08-27"},"comparison":{"period_label":"Year ending June 2025","value":1808,"vintage":"2026-08-27"},"source":{"publisher":"Home Office","publication":"Immigration system statistics: immigration detention summary tables","landing_url":"https://www.gov.uk/government/statistical-data-sets/immigration-system-statistics-data-tables","sheet":"Det_01","table":"Det_01","row":"Year ending June 2026","column":"In detention (at end of period)","raw_value":"2152","file_url":"https://assets.publishing.service.gov.uk/media/6a85c45cb0504df9f2c89804/immigration-detention-summary-jun-2026-tables.ods","file_sha256":"0ffdd04eae8e5ab373c9f5223ca57a484e05a529bbffe03ec1688dbedbe07ed7","release_date":"2026-08-27","release_label":"Year ending June 2026"},"definition":"The number of people held in immigration detention on the last day of the period, in immigration removal centres, short-term holding facilities, pre-departure accommodation and prisons. This is a stock, not a flow.","does_not_measure":"The number of people detained at any point during the period, or people on immigration bail.","links":{"page":"/migration/detention-population","series":"/api/metrics/detention_population/series","vintages":"/api/metrics/detention_population/vintages"}}