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Police
Courts - police can give evidence at courts , provide protection for vulnerable witnesses and hold defendants in cells and transport them to and from court
CPS - provides evidence for CPS and charge offenders according to their guidelines
HM Prisons and probation service - arrest those recalled back to prison
Parliament
Ministry of Justice - home office oversees the justice system and makes sure it is running smoothly
oversees courts, prisons and probation service
CPS - decides the charge based on legislation and guidelines made by Parliament decisions
Probation Service
HM Prison and Parole Board - supervises those on licence in society once leaving prison
courts - prepping pre-sentencing reports, supervising offenders on a community sentences and supervises drug testing by court order
CPS
Police - advise police on charging a suspect, gathering evidence to build a case
Courts - prepping and presenting the case for the prosecution and preparing the appeals against unduly lenient sentences
Sentencing council
Contributes to law creation through judicial precedent and statutory interpretation
Prison Service
Probation - work with probation services when a prisoner is to be released
Police - facilitating interviews with prisoners
judges and courts decide sentencing in prisons
defendant who are denied bail are kept in custody and remanded in prison