Source · IMB Annual Report

High Down

AI-generated report summary HMP High Down, a Category C training and resettlement prison, housed 1133 prisoners at year-end, 135 above its CNA. The reporting year saw improvements in key work and education attendance, but significant concerns persist regarding the inadequate provision of social care, the holding of acutely mentally unwell prisoners in segregation, and delays in mental health transfers. Despite a decrease in self-harm incidents and assaults, issues with prisoner safety, illicit items, and communication remain prominent.

Year: 2025 Published: 4 Jun 2026 Type: Prison · Cat C Population: 1,133 Recommendations: 10 Key concerns Positive findings

Safety statistics

Incidents during reporting year
IndicatorThis yearPrevious
Deaths in custody7
Self-harm incidents575651
ACCT cases opened541533
Prisoner assaults162202
Assaults on staff8291
Use of force673625
Drug finds259432

Positive findings

AI-generated summary
The Board noted improvements in key work provision, property management, and education attendance. Chaplaincy services received high praise for their quality and visibility. The recovery unit showed positive developments following a review, and drone incursions decreased. Cell bell response times improved significantly, and the creation of an enrichment hub, along with houseblock-based activities, is welcomed for supporting rehabilitation and wellbeing.

Key concerns

30 items
Regime/Time Out of Cell From our conversations with prisoners, a significant number still perceive the induction process as inadequate.
Safety Repeated there continues to be a disproportionate number of self-harm incidents among imprisonment for public protection (IPP) prisoners and recall prisoners.
Safety Repeated Lack of funding continues to appear to restrict initiatives/courses to help reduce violence.
Substance Misuse The number of recorded incidents of prisoners being under the influence (UTI) increased significantly in 2025.
Other Repeated Whilst prisoner property appears to be better managed than in previous years, when prisoners are transferred to the CSRU, property appears to regularly go missing and the relevant paperwork does not always seem to be completed.
Healthcare Repeated In our view, the level of social care provided by Surrey County Council (SCC) continues to be inadequate and leaves vulnerable prisoners at risk during evenings and weekends.
Mental Health Repeated In the absence of any alternative location, prisoners with acute mental health issues continue to be held in the CSRU, despite failing the medical algorithm to say that they are suitable for segregated conditions.
Staffing Repeated There is a lack of prison probation staff, which increases pressure on those in-post and exacerbates issues of prisoner access to staff in the offender management unit (OMU).
Healthcare Repeated The Board continues to have significant ongoing concerns about the treatment of older prisoners and those with social care needs, including the physical environment for mobility, who are not receiving an appropriate level of care.
Regime/Time Out of Cell Processing arrivals after this requires cross-deployment of staff. As in 2024, the late arrival of prison transport caused disruption to evening regime.
Regime/Time Out of Cell Prisoners unable to conform to a category C regime are being sent to prisons like High Down, placing additional pressure on CSRU and failing prisoners.
Mental Health The average time for transfers to a secure mental hospital once an assessment has been made increased significantly in 2025.
Complaints/Property Responses to complaints about healthcare provision can take a very long time to come through.
Healthcare However, we continue to be concerned about the number of missed appointments, often due to prisoners not being unlocked or escorted to the appointment on time, an issue that is often raised with us by prisoners.
Regime/Time Out of Cell Repeated Despite raising the issue in previous reports, full-time workers still frequently report that they are not given adequate time to access basic regime, such as showers and kiosk, when they return from work.
Safety Our 2025 IMB survey indicated that 49% of prisoners have felt unsafe whilst at High Down.
Substance Misuse Information indicates that there continued to be a high level of illicit items within the establishment throughout the year, despite a decrease in drone incursions.
Estate/Conditions Accommodation issues were frequently observed, including dirty cells, lack of pillows, pigeon nesting, guano build-up, and broken phones/dryers. Source wording under review
Estate/Conditions Issues with the domestic laundry machines across the prison continued during the year. The Board raised safety concerns throughout 2025, including machines being used while the prison was in a patrol state (a restricted regime in which prisoners are locked in their cells) and fire doors within laundry areas being forced open. In August, there was an incident involving a broken tumble dryer that overheated.
Food/Catering ‘There is a lack of lunch options. The diet is completely carbs and lacks vitamin C. Food is often cold and undercooked and stale.’
Segregation The number of prisoners held in the CSRU for over 42 days (the limit allowed without external authorisation) at one time has increased.
Complaints/Property The Board has seen a 26% increase in applications related to adjudications, with prisoners frequently citing delays and a lack of paperwork, and concerns that unproceeded adjudications remain on records.
Staffing Repeated Communication: In the survey, 56% of prisoners described communication at HMP High Down as very poor, with a further 20% describing it as poor.
Equality/Diversity Minority ethnic and black prisoners were over-represented on the basic level and under-represented on enhanced status within the incentives scheme.
Complaints/Property The Board notes that the number of complaints made to the prison continues to rise, reaching 3905 this year.
Complaints/Property Applications to the IMB are posted in a clearly marked blue box on each houseblock. However, one of the boxes was missing for seven months and, when replaced, the new box was installed without a lock. Prisoners have told the Board that this has discouraged them from submitting applications, due to concerns that their correspondence could be read.
Staffing The neurodiversity support manager left High Down in 2025 and has not yet been replaced.
Regime/Time Out of Cell Significant staffing changes on the CLU resulted in a lack of additional personalised support for long-term determinate and IPP prisoners, as activities and tailored programmes were unable to continue.
Education/Purposeful Activity The number of spaces available for Tier 2 enrichment activities remains low in relation to the overall prison population.
Equality/Diversity Repeated The IMB has been reporting issues with the lifts in prisoner areas since 2021. Whilst there have been improvements, there continued to be issues throughout 2025. The two PCoSO houseblocks continue to have a higher proportion of prisoners with accessibility needs. Neither of these houseblocks has a lift, and there are limited access ramps in place, including no ramp access to the servery in one. Whilst there are social care peers on these houseblocks, as set out in section 6.4, we remain concerned about the challenges these prisoners face in accessing healthcare, showers, exercise and purposeful activity.

Recommendations

10 items · 5 repeated

Recommendation 1

Addressee: Ministry of Justice

For several years, we have raised concerns relating to very unwell prisoners being held in the CSRU. What specific actions are being taken to improve outcomes for mentally unwell prisoners in detention, and how will their impact be monitored and reported?

Repeated Source text verified

Government response
I recognise your continued concerns regarding mentally unwell prisoners being held in the Care, Separation and Reintegration Unit (CSRU). I can provide assurance that the healthcare provider, commissioned by NHS England, and prison staff have built strong relationships to implement an integrated approach to the planning and delivery of care within the CSRU, including mental health resources and interventions. It remains the case that the use of a CSRU long-term is not appropriate for a prisoner who is mentally unwell and access to other more appropriate secure settings are actively sought that can meet the individual’s needs. The CSRU will also only used as a last resort to maintain their safety and the safety of others and multidisciplinary oversight and support is put in place. In addition, further to last year’s response, I can advise that the significant reforms of the Mental Health Act 2025 received Royal Assent in December 2025 and further details about implementing these reforms are set out in the annex.

Recorded status: In progress

Topic: Mental Health

Recommendation 2

Addressee: Ministry of Justice

Community probation continues to take priority over prison probation services, thereby increasing pressure on in-post staff. What steps will the Minister take to address probation workforce shortages and ensure sustainable staffing levels in the prison?

Repeated Source text verified

Government response
Regarding your concerns about the probation workforce levels, please be assured that the recruitment and training of staff remain high priorities for the Probation Service to provide a workforce that can safely supervise and manage offenders in the community. Whilst there is more to do, staffing levels for Probation Service grades have increased by 21% between June 2021 and December 2025 and the 2025/26 trainee target was exceeded. There is a commitment to onboarding at least 1,300 further trainees during this financial year 2026/27 and work is underway locally at HMP High Down to progress to the agreed probation resourcing allocation. The overall probation budget is also increasing by up to £700 million over the next three years to bolster community justice, which includes the probation service’s resource and ability to tag offenders. Alongside this our Future Probation Service Programme is rebalancing demand and capacity by implementing measures that will reduce workloads through technology, efficiency and changing how we work. This will allow probation practitioners to provide closer oversight of offenders who pose the greatest risk, focusing more on engaging, motivating and supporting people to turn their lives around. In addition, the significant reforms contained in the Sentencing Act, which received Royal Assent on 22 January 2026 will provide the Courts with options to end the cycle of less serious offenders going in and out of prison. This will also help HMPPS to inform the future requirements for the prison estate to keep protecting the public and support reducing reoffending.

Recorded status: In progress

Topic: Staffing

Recommendation 3

Addressee: Ministry of Justice

Reiterating an issue raised last year, the Board continues to have significant ongoing concerns about the treatment of older prisoners and those with social care needs. What provision is the Minister making to ensure that these prisoners receive an appropriate level of care across the prison estate?

Repeated Source text verified

Government response
I do also appreciate your recurring concerns about the needs of an older prisoner population. We are aware of the increasing demand for appropriate healthcare for older prisoners, including chronic and acute health issues and that this proportion of the population is going to rise. NHS England is committed to ensuring that the healthcare provision for the population at HMP High Down is responsive to the changing needs of the different cohorts at the prison. Opportunities to increase access to relevant health provision continues to be sought via secondary care providers, such as specialist care teams in Hospitals via video appointments, as well as an ongoing review of the local provision on site. A Memorandum of Understanding is in place with the Local Authority and there is a proactive approach to resolving social care services provision. HMP High Down has a dedicated senior leader to provide oversight for older prisoners and arrangements are in place for appropriate out-of-hours social care provision to be delivered at the prison where required in line with the Local Authorities statutory obligation. In addition, the HMPPS Older Prisoners Strategy mentioned in my previous response aims to be published later this year, and will examine how the prison estate, regimes, and health and social care arrangements can better meet the needs of this cohort. The work includes engagement with NHS England, local authorities and third-sector partners to consider how provision can be strengthened and delivered more consistently across the estate, including through improved coordination and continuity of care.

Recorded status: In progress

Topic: Healthcare

Recommendation 4

Addressee: HMPPS

What is being done to minimise the number of late arriving prisoner vans?

Source text verified

Government response
It is acknowledged that various issues can have an impact on the journey from court or to and from custody. However, an enhanced reporting framework is now utilised to capture Prisoner Escort and Custody Service (PECS) performance data, which is shared with all Governing Governors and Prison Group Director offices to support monitoring and informed decision-making. Its introduction has been positively received across the prison enabling HMPPS and PECS to more effectively identify, manage, and respond to issues. Where necessary this enables HMP High Down to escalate any concerns. In addition, an inter-prison transfer efficiency review has now been completed and implementation is being taken forward collaboratively by various national teams in HMPPS involved in the transfer process.

Recorded status: In progress

Topic: Regime

Recommendation 5

Addressee: HMPPS

Why are prisoners unable to conform to a category C regime being sent to prisons like High Down?

Source text verified

Government response
The correct category for a prisoner is informed by a robust risk assessment undertaken by staff who are experts in offender behaviour and psychology to ensure that the full range of risk factors are considered. This includes considering that an individual may present as compliant within custody while still presenting an elevated risk level. The offence committed and any offending history will also be considered in the assessment. The purpose of the security categorisation process is to assign prisoners to the lowest security category appropriate to managing their risks and it is worth noting that category C prisons provide a level of physical and procedural security capable of safely and securely managing the majority of male prisoners in the estate and this is where most male prisoners are held. A categorisation assessment decision to a lower category will only be made if the collective risk of the prisoner is deemed safe to be able to be managed in the lower security conditions. A prisoner’s security category will not be adjusted to achieve a better match with the available spaces within the estate.

Recorded status: Noted

Topic: Regime

Recommendation 6

Addressee: NHS / Healthcare Provider

What is being done to reduce the average time for transfers to a secure mental hospital once an assessment has been made?

Source text verified

Government response
The Mental Health Act 2025 introduces a new statutory time limit of 28-days for the transfer of patients with a mental disorder from prison and other places of detention to hospital. This reform is due to commence by December 2027 and the newly established Mental Health and Justice Strategic Advisory Group will have oversight to assure the 28-day transfer process. NHS England remains fully committed to improving the timeliness of transfers and is actively engaged in an ongoing national and regional programmes aimed at strengthening pathways, reducing delays, and supporting consistent progress towards achieving the statutory time limit. Within the NHS England south east region scoping work has been completed to ensure that there is clinical leadership throughout the pathway from and to prison and a mental health hospital. HMP High Down is also continuing to work closely with the on-site mental health team to ensure appropriate care is provided to individuals suffering acute mental health problems to keep them safe prior to an appropriate transfer taking place.

Recorded status: In progress

Topic: Mental Health

Recommendation 7

Addressee: NHS / Healthcare Provider

What is being done to improve the speed of responses to complaints about healthcare provision in High Down?

Source text verified

Government response
The Board can be assured that the healthcare provider at HMP High Down treats complaints by patients with the appropriate level of seriousness and there is a policy in place to ensure that health related complaints are responded to in a timely way. It is recognised that on occasions, the nature of the complaint requires significant on-site investigation and this can impact the length of the response time. The health provider will be introducing a complaints update process to ensure that patients are notified of any delays which follows the successful implementation of a similar approach at HMP Aylesbury recently.

Recorded status: In progress

Topic: Complaints

Recommendation 8

Addressee: Governor / Director

What is being done to ensure that prisoners are unlocked and escorted on time for all healthcare appointments?

Source text verified

Recorded status:

Topic: Healthcare

Recommendation 9

Addressee: Governor / Director

Despite raising the issue in previous reports, full-time workers continue to be denied access to the regime when they return to the houseblocks. What can be done to resolve this issue?

Repeated Source text verified

Recorded status:

Topic: Regime

Recommendation 10

Addressee: Governor / Director

What can be done to ensure that property does not go missing when prisoners are brought to the CSRU?

Repeated Source text verified

Recorded status:

Topic: Other

Related inspections & investigations

1 Jun 2026 HMIP · Unannounced
3 May 2024 HMIP · IRP
31 Jul 2023 HMIP · Unannounced Safety 2 · Respect 3 · Activity 1 · Release 2
7 Apr 2021 HMIP · Inspection
PPO fatal incident David Weekes
PPO fatal incident Oliver Mulangala · Other non-natural
PPO fatal incident Brian Moore
PPO fatal incident Daniel Brown · Natural causes
13 May 2025 PPO fatal incident Mohammed Fethaullah · Natural causes
8 Dec 2025 PFD Oliver Mulangala · State Custody related deaths | Alcohol, drug and medication related deaths
27 Nov 2016 PFD Matthew Russell · State Custody related deaths; Suicide (from 2015)

Other reports for High Down

2024 Published 20 May 2025 Population 1,205 · Self-harm 661 · Concerns
2023 Published 11 Jul 2024 Population 1,148 · Self-harm 651 · Concerns
2022 Published 14 Jun 2023 Population 1,090 · Self-harm 721 · Concerns
2021 Published 17 Jun 2022 Population 1,021 · Self-harm 779 · Concerns
2020 Published 15 Jul 2021 Population 930 · Self-harm 577 · Concerns