{"metric":"prison_population_by_nationality_group","title":"Prison population by nationality group","unit":"people","geography":"K04000001","publisher":"Ministry of Justice","publication":"Offender management statistics quarterly: prison population","publication_url":"https://www.gov.uk/government/collections/offender-management-statistics-quarterly","licence":"Contains public sector information licensed under the Open Government Licence v3.0.","series":[{"period_label":"June 2025","period_start":"2025-06-01","period_end":"2025-06-30","value":87334,"status":"final","release_label":"Prison population as at 30 June 2026","release_date":"2026-07-30"},{"period_label":"September 2025","period_start":"2025-09-01","period_end":"2025-09-30","value":87465,"status":"final","release_label":"Prison population as at 30 June 2026","release_date":"2026-07-30"},{"period_label":"December 2025","period_start":"2025-12-01","period_end":"2025-12-31","value":85613,"status":"final","release_label":"Prison population as at 30 June 2026","release_date":"2026-07-30"},{"period_label":"March 2026","period_start":"2026-03-01","period_end":"2026-03-31","value":87342,"status":"final","release_label":"Prison population as at 30 June 2026","release_date":"2026-07-30"},{"period_label":"June 2026","period_start":"2026-06-01","period_end":"2026-06-30","value":85858,"status":"final","release_label":"Prison population as at 30 June 2026","release_date":"2026-07-30"}]}