Organisations concerned with Law and Criminal Justice are listed as separate organisations types to make selection easier.
Courts - England and Wales has a unified court service, in which Her Majestys Court Service manages all local courts, including Crown, County and Magistrates Courts. Magistrates Courts provide the first level of judicial court dealing with the vast majority of offences. Crown Courts handle the most serious criminal offences; County Courts with civil cases. Scotland has Sheriff & District Courts and Northern Ireland has Petty Sessions
The Probation Service - this deals with the rehabilitation of ex-offenders, and the supervision of Community Service. In Scotland the nearest equivalent is the Criminal Justice Service, which is part of each local authorities social services set-up. Details of Criminal Justice Service Managers can be found in the Local Government Database
The Prison Service - this deals with offenders serving custodial sentences; the structure is similar throughout the UK.