Source · IMB Annual Report
Warren Hill
Year: 2025
Published: 13 Nov 2025
Type: Prison · Cat C
Population: 267
Recommendations: 10
Key concerns
Positive findings
HMP Warren Hill is a well-run Category C prison for men serving life or IPP sentences, consistently demonstrating a high commitment to safety and positive staff-prisoner relations. While the prison excels in healthcare provision, purposeful activity, and support for neurodiverse prisoners, key challenges include the ongoing cancellation of ROTL, uncertainty surrounding prison expansion and kitchen facilities, and the potential impact of future education budget cuts. The Board urges action on these issues to further enhance rehabilitation and resettlement outcomes for prisoners.
Safety statistics
| Indicator | This year | Previous |
|---|---|---|
| Deaths in custody | 3 | — |
| Self-harm incidents | 11 | — |
| ACCT cases opened | 11 | — |
| Prisoner assaults | 8 | — |
| Assaults on staff | 2 | — |
| Use of force | 9 | — |
| Drug finds | 9 | — |
Positive findings
HMP Warren Hill continues to be a well-run, safe, and secure prison with good staff-prisoner relations. The IMB commends the clean residential units and well-maintained grounds, as well as good healthcare facilities. They welcome new relationships with local employers and the development of the Willow Unit for independent living. Positive aspects include high HMIP safety ratings, effective self-harm and violence reduction strategies, and good efforts in diversity and inclusion, pastoral care, and key worker provisions. Education and purposeful activity, including arts, music, and vocational training, are generally good and well-resourced.
Key concerns
Resettlement/Release
Repeated
The Minister should urgently re-consider the cancellation of ROTL at HMP Warren Hill, as it is felt that its reintroduction would aid rehabilitation and resettlement of prisoners.
Estate/Conditions
Repeated
Concerns remain over the proposed expansion of the prison with approximately 90 RDCs (rapid deployment cells) being added, and whether ancillary provision will be proportionally increased.
Estate/Conditions
Repeated
Uncertainty remains about whether new kitchen facilities will be provided solely for the Warren Hill site as part of the proposed expansion programme.
Education/Purposeful Activity
Concerns were expressed over the proposal to reduce the education budgets in prisons by approximately 35% overall, and how HMPPS proposes to mitigate this reduction to ensure educational outcomes for prisoners are maintained.
Estate/Conditions
A definite picture of future building works, including proposed kitchen provisions, and a detailed, funded project plan are needed to eliminate current uncertainty, as current RDC and kitchen projects have been very 'stop - start'.
Healthcare
Plans are needed to accommodate elderly prisoners in a more purposeful way, including making physical adaptations to the prison to be age-friendly and ensuring appropriate care packages are in place for prisoners with social care needs, given the increasing age profile of the prisoner population.
Staffing
The opportunities offered by the Governance Review, such as joint training, working, and development opportunities across both sites along with improved opportunities for prisoners, need to be fully exploited.
Resettlement/Release
Further follow-up work is needed to assess the effectiveness of the Warren Hill regime against the high recall rates.
Resettlement/Release
The work of the EAB (employment advisory board) should be further supported and enhanced so that prisoners have genuine work and industrial experience recognising the ROTL comments.
Education/Purposeful Activity
Repeated
A variety of avenues should be explored to enhance the use of IT in prison to equip and assist prisoners on their release.
Recommendations
| # | Recommendation | Addressee | Status |
|---|---|---|---|
| 1 |
As in last year’s annual report, will the Minister urgently re-consider the cancellation of ROTL at HMP Warren Hill, as it is felt that its reintroduction would aid rehabilitation and resettlement of prisoners?
Repeated
Response
I am very much aware of your continued concerns about access to Release on Temporary Licence (ROTL) at HMP Warren Hill, following the previous Government’s decision to suspend the pilot. You will know from my reply to you last year that the current ROTL Policy Framework requires Indeterminate Sentence Prisoners (ISP), including those serving Imprisonment for Public Protection (IPP) sentences, to be tested in open conditions before accessing ROTL to ensure suitability and public protection. However, it is recognised that for prisoners released directly from HMP Warren Hill, the gap between custody and release can be significant without the benefits of ROTL. Therefore, options are being considered to address this as part of the IPP Action Plan which was published in the annual report on the IPP sentence 2024 to 2025 on 17 July 2025. Target 5 of the refreshed action plan sets out a commitment to extend ROTL access to all four progression regime prisons by July 2026 which includes HMP Warren Hill. It will build on previous experience and the Ministry of Justice and HM Prison and Probation Service (HMPPS) are exploring how this can be delivered safely and effectively. The prison locally has also setup up its own ROTL working group to enable local policies and procedures to be put in place. |
Ministry of Justice | In progress |
| 2 |
In the last annual report, some concerns were expressed over the proposed expansion of the prison, with approximately 90 RDCs (rapid deployment cells) being added to the establishment. Will the ancillary provision be proportionally increased? This concern remains, although assurances have been given.
Repeated
Response
The Board can be assured that the planned expansion at HMP Warren Hill to deliver the rapid deployment cells (RDCs) will also provide a proportionate ancillary provision to maintain operational effectiveness and staff welfare. This will include additional storage, laundry areas, staff rooms, office space, serveries, self-cook areas, prisoner activity places and other enhancements to allow the prison to operate efficiently following the expansion. |
HMPPS | Accepted |
| 3 |
In a similar vein, there remains some uncertainty about whether new kitchen facilities will be provided solely for the Warren Hill site. Will a new kitchen solely for the Warren Hill site be provided as part of the proposed expansion programme?
Repeated
Response
The new kitchen which is planned as part of the expansion programme is intended solely for HMP Warren Hill to cater for the prison’s population. Further details will be able to be shared with the Board once the project design is finalised. |
HMPPS | Accepted |
| 4 |
The Board had received a warning during the reporting year that there would be reductions in the education budget for 2025-2026. However, some surprise and concerns were expressed over the proposal to reduce the education budgets in prisons by approximately 35% overall. How does HMPPS propose to mitigate this reduction to ensure educational outcomes for prisoners are maintained?
Response
There have been no cuts to the national prison education budget in the current financial year, it has in fact been increased. However, it is recognised that this budget has not been able to keep pace with the significant rise in the cost of delivering high-quality education in recent years. This has resulted in some reduction in the volume of Core Education being delivered from October 2025 onwards, but does not affect other education services such as libraries, careers advice, distance learning or vocational training delivered through industries and workshops. Investment will continue in digital infrastructure, new assessment tools, and specialist staff to ensure the budget delivers the greatest possible impact for learners. Governors also retain access to the Prison Education Dynamic Purchasing System to commission provision tailored to the local prisoner population needs. Locally at HMP Warren Hill, have worked closely with the education provider to ensure that the education provision meets the need of the population and over 10% of the population are involved in higher education. The prison will also continue to work with the Employment Advisory Board to improve outcomes for the prisoner population through employment and vocational opportunities |
HMPPS | In progress |
| 5 |
Furthermore, it would be helpful to have a definite picture of the future building works, including the proposed kitchen provisions so that more detailed planning can be undertaken. The current kitchen and rapid deployment cell (RDC) projects have been very 'stop - start'; could a detailed project plan and funded project plan be presented to the prison to eliminate the current uncertainty?
Response
It is recognised that there have been delays in the expansion programme due to a change in contractor. HMPPS is working closely with partners to progress the project design and remain committed to ensure the prison, the national catering team, and wider stakeholders are informed throughout the process. Regular partnering calls with the prison will continue to take place to update on progress and a comprehensive implementation plan will be shared once finalised. |
HMPPS | In progress |
| 6 |
The IMB recognises that the age profile of the prisoner population is increasing. What is the Governor’s/HMPPS’s plan to accommodate elderly prisoners in a more purposeful way, including making physical adaptations to the prison to be age-friendly and ensuring appropriate care packages are in place for prisoners with social care needs?
Response
It is recognised that there has been an increase in the number of older prisoners in custody in recent years. This has created some challenges for prisons due to the complex health and social care needs and the physical design of the prison estate. However, the new prison places across the estate are accessible by design to accommodate mobility needs and will significantly increase the number of cells adapted to the needs of those with mobility issues and physical disabilities. A strategy for older prisoners was recommended by the recent Independent Sentencing Review, and as part of this strategy, how best to use the estate to support older prisoners across all prisons is being considered. Locally, HMP Warren Hill is monitoring the age of its population and exploring ways to make its facilities and purposeful activity age-friendly to maintain engagement and improve wellbeing. As NHS England commission the healthcare services within prisons and Local Authorities commission social care packages, the prison continues to work with the commissioners and the providers to ensure that the health and social care provision meets the need of the prison population as it changes. |
HMPPS | In progress |
| 7 |
Will the opportunities offered by the Governance Review be fully exploited? For example, joint training and working and development opportunities across both sites along with improved opportunities for prisoners, again across both sites?
Response
I also welcome the governance review across HMPs Warren Hill and Hollesley Bay to improve effectiveness and efficiency, which I hope will build on the existing good practice, as well as the many positive aspects HM Inspectorate of Prisons found when they visited HMP Warren Hill in February 2025. |
Governor / Director | Noted |
| 8 | Further follow-up work is developed so that the effectiveness of the Warren Hill regime can be assessed against the recall rates. | Governor / Director | |
| 9 |
The work of the EAB (employment advisory board) is further supported and enhanced so that prisoners have genuine work and industrial experience recognising the ROTL comments addressed to the Minister above.
Response
The prison will also continue to work with the Employment Advisory Board to improve outcomes for the prisoner population through employment and vocational opportunities |
Governor / Director | In progress |
| 10 |
A variety of avenues are explored to enhance the use of IT in prison to equip and assist prisoners on their release.
Repeated
Response
Investment will continue in digital infrastructure, new assessment tools, and specialist staff to ensure the budget delivers the greatest possible impact for learners. |
Governor / Director | In progress |
Applications to the IMB
| Category | Current | Previous |
|---|---|---|
| Accommodation (including transfers) | 45 | 38 |
| Discipline | 21 | 18 |
| Equality | 0 | 0 |
| Family and legal visits | 4 | 2 |
| Finance and benefits | 10 | 11 |
| Food | 18 | 10 |
| Healthcare | 37 | 30 |
| IMB Complaints and general | 19 | 15 |
| Offender Management Unit (OMU) | 7 | 8 |
| Property | 41 | 39 |
| Regime | 9 | 12 |
| Release | 3 | 1 |
| Religious | 0 | 1 |
| Security | 5 | 5 |
| Staff | 29 | 24 |
| Total | 261 | 240 |
| Work and Education | 12 | 16 |
Related inspections & investigations
Other reports for Warren Hill
Report details
- Establishment
- Warren Hill
- Type
- Prison · Cat C
- Report year
- 2025
- Published
- 13 November 2025
- Responsible body
- HMP Warren Hill
- Recommendations
- 10
- MoJ rating (2024/25)
- 4 — Outstanding
Population
| Population | 267 |
| Operational capacity | 267 |
| Time out of cell | 11.8h/day |
Service providers
Arts & Music Education
Britten Pears Arts
Drug & Alcohol Rehabilitation
Phoenix Futures
Education (Philosophy)
University of East Anglia
Employment Support (Benefits)
DWP
Employment Support (HMPPS)
New Futures Network
Family Support
Ormiston Families
Healthcare
Practice Plus Group
Library Management
People Plus
Mental Health Support
Forward Trust
Social Care Assessment
Suffolk County Council