{"metric":"prison_operational_capacity","unit":"places","geography":"K04000001","note":"Every published estimate for every period, oldest release first. A period appearing more than once was revised.","vintages":[{"period_start":"2026-08-17","period_end":"2026-08-23","period_label":"Week beginning 17 August 2026","value":88921,"status":"final","vintage":"2026-08-17","release_label":"Week of 17 August 2026","source":{"sheet":"Data","table":"Population and Capacity Briefing","row":"Useable Operational Capacity","column":"Total","raw_value":"88921"}},{"period_start":"2026-08-24","period_end":"2026-08-30","period_label":"Week beginning 24 August 2026","value":88937,"status":"final","vintage":"2026-08-24","release_label":"Week of 24 August 2026","source":{"sheet":"Data","table":"Population and Capacity Briefing","row":"Useable Operational Capacity","column":"Total","raw_value":"88937"}}]}