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

Incidents during reporting year
IndicatorThis yearPrevious
Deaths in custody3
Self-harm incidents11
ACCT cases opened11
Prisoner assaults8
Assaults on staff2
Use of force9
Drug finds9

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

10 items
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

10 items · 4 repeated
#RecommendationAddresseeStatus
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

CategoryCurrentPrevious
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

PPO fatal incident Steve McBride · Self-inflicted
5 Feb 2025 PPO fatal incident Bryn Tomaz-Daniels · Natural causes
14 Nov 2024 PPO fatal incident Simon Penton · Natural causes
13 Dec 2021 PPO fatal incident Individual at Warren Hill · Natural causes
17 Oct 2021 PPO fatal incident Individual at Warren Hill · Natural causes

Other reports for Warren Hill

2024 Published 17 Sep 2024 Population 270 · Self-harm 69 · Concerns
2023 Published 1 Nov 2023 Population 240 · Self-harm 11 · Concerns
2022 Published 24 Oct 2022 · Self-harm 26 · Concerns
2021 Published 2 Nov 2021 · Concerns
2020 Published 5 Jan 2021 Population 237 · Concerns

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

Population267
Operational capacity267
Time out of cell11.8h/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

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