HMIP Inspections of Warren Hill

The prison was given a full inspection in February 2025, the full report can be read on the HM Inspectorate of Prisons website, just follow the links below. In their latest report the inspectors said:

HMP & YOI Warren Hill is a category C closed prison in Suffolk operating a progression regime for men serving life, indeterminate or extended sentences who have previously failed in or are no longer eligible for open conditions, run by HM Prison and Probation Service, holding 267 men against an operational capacity of 269. Inspectors rated safety, respect and preparation for release all Good and purposeful activity reasonably good, all unchanged from the previous inspection. Charlie Taylor said being rated good in three of the four healthy prison tests and reasonably good in the fourth was a significant achievement.

Violence and drug use were very low, with just nine violent incidents in the year, the lowest of any category C prison, and drug test positivity of only 3.4%, also the lowest among category C prisons. Eighty-one per cent of men were engaged in purposeful activity, prisoners were unlocked for over 11 hours a day from Monday to Thursday, and accommodation was single-cell and self-catering, with a coffee shop, barber and prison shop on site.

Inspectors’ main concern was recall, with around half of prisoners released from Warren Hill in the previous two years returned to custody, which Taylor called disappointing. Inspectors also noted limited capacity in the approved-premises replication unit, weak relationships with employers to secure job placements after release, and a need to restore release on temporary licence arrangements, while flagging that a planned operational merger with the neighbouring HMP & YOI Hollesley Bay would be critical to the prison’s future success.

Charlie Taylor
HM Chief Inspector of Prisons
April 2025

HMP & YOI Warren Hill

To read the full reports, go to the HM Inspectorate of Prisons website or follow the links below: