Legal & Sentencing
Last updated: 16 January 2026

PSI (Prison Service Instruction)

Prison Service Instruction - mandatory guidance issued by HMPPS that sets out how specific policies and procedures must be implemented in prisons. Part of the Prison Service Order framework.

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PSI (Prison Service Instruction)
HMPPS

HMPPS

His Majesty's Prison and Probation Service. The executive agency responsible for prisons and probation in England and Wales.

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