{"metric":"prison_population_by_sentence_length","title":"Prison population by custody type and sentence length","topic":"crime","unit":"people","measure_type":"stock","geography":"K04000001","comparison_method":"year_on_year","latest":{"period_start":"2026-06-01","period_end":"2026-06-30","period_label":"June 2026","value":85858,"status":"final","vintage":"2026-07-30"},"comparison":{"period_label":"June 2025","value":87334,"vintage":"2026-07-30"},"source":{"publisher":"Ministry of Justice","publication":"Offender management statistics quarterly: prison population","landing_url":"https://www.gov.uk/government/collections/offender-management-statistics-quarterly","sheet":"Table_1_Q_2","table":"Table 1.Q.2","row":"Sex=Male and female; Age group=All ages; Custody type=All custody types","column":"30 June 2026","raw_value":"85858","file_url":"https://assets.publishing.service.gov.uk/media/6a69e0c216bc92f51e1a430f/prison-population-30-June-2026.ods","file_sha256":"9f832c04e75831f86a60287515833feb4504b6a871037542a6d7319cbe8e4c96","release_date":"2026-07-30","release_label":"Prison population as at 30 June 2026"},"definition":"The prison population of England and Wales at the end of each month, split by custody type as the Ministry of Justice publishes it, that is remand status (untried, convicted unsentenced), determinate sentence length band, extended, IPP and life sentences, recalls, fine defaulters and non-criminal prisoners.","does_not_measure":"Time served or time left to serve; sentence length is the length imposed by the court.","links":{"page":"/crime/prison-population-by-custody-type","series":"/api/metrics/prison_population_by_sentence_length/series","vintages":"/api/metrics/prison_population_by_sentence_length/vintages"}}