Privately managed prisons were introduced to the UK in the 1990s.
HM Chief Inspectorate of Prisons inspects private prisons in the same way as public sector prisons. All private prisons have a 'Controller' linking them to the National Offender Management Service, and the governors of private prisons are called 'Directors'.
At present there are 11 private prisons contractually managed by private companies such as Kalyx, Serco and G4S Justice Services.
HMP Altcourse - G4S Justice Services
HMP Ashfield - Serco
HMP Birmingham - G4S Justice Services
HMP Bronzefield - Kalyx (previously known as UKDS)
HMP and YOI Doncaster - Serco
HMP Dovegate - Serco
HMP/YOI Forest Bank - Kalyx (previously known as UKDS)
HMP Lowdham Grange - Serco
HMP/YOI Parc - G4S Justice Services
HMP Peterborough - Kalyx (previously known as UKDS)
HMP Rye Hill - G4S Justice Services
HMP Wolds - G4S Justice Services