UK prison estate

Her Majesty's Prison Service is a part of Her Majesty's Prison and Probation Service (formerly the National Offender Management Service), which is the part of Her Majesty's Government tasked with managing most of the prisons within England and Wales. (Scotland and Northern Ireland have their own prison services: the Scottish Prison Service and the Northern Ireland Prison Service, respectively.)

The CEO of HMPPS, currently Michael Spurr, is the administrator of the prison service. The CEO reports to the Secretary of State for Justice and also works closely with the Prisons Minister, a junior ministerial post within the Ministry of Justice.

It has its head office in Clive House in London, and previously its head office was in Cleland House in the City of Westminster, London.

The British Overseas Territory of Bermuda's HM Prison Service (renamed the Department of Corrections in 2002) was a separate organization.

In 2004, the Prison Service was responsible for 130 prisons and employed around 44,000 staff. As of 2009 the number of prisons had increased to 131, including 11 privately owned prisons.

The Service's statement of purpose states "Her Majesty's Prison Service serves the public by keeping in custody those committed by the courts. Our duty is to look after them with humanity and help them lead law-abiding and useful lives in custody and after release." The Ministry of Justice's objective for prisons seeks "Effective execution of the sentences of the courts so as to reduce re-offending and protect the public".

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