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HM Prison Portland is a male Adult/Young Offenders Institution in the village of The Grove on the Isle of Portland, in Dorset, England. It is operated by His Majesty's Prison Service. The prison was originally opened in 1848 as an adult convict establishment, before becoming a Borstal in 1921, and a YOI in 1988. In 2011 it became an Adult/Young Offenders establishment.
Source: Wikipedia article lead, CC-BY-SA.
Capacity
—
Current population
—
Occupancy
—
Year opened
1848
Operational
Figures from official sources · verified 29 May 2026 · methodology
Operator
His Majesty's Prison ServicePopulation held
Mixed/unknown
Opened
1848
Region
—
Security level
—
Death-row facility
No
problems with drugs and violence. young population of which 14% were under 21, and nearly half were under 30. lost its way, struggling with high levels of violence, poor living conditions and a around the jail and comments in our staff survey were positive about the Leaders had successfully challenged and begun to change the culture at Portland, improving consultation with the staff team and addressing negative There had however, been problems with recruiting sufficient mental health staff Although leaders had worked hard to reduce levels of violence which had, in the source of many incidents. Staff had worked hard to ramp up purposeful activity served a particularly deprived population of which nearly 39% were care was hampered by staff shortages, leaving some of the good facilities in the jail We were particularly impressed by many of the middle leaders and custody who were encouraged to innovate by the senior leadership team.
Portland was a long way from home, making visits difficult and adding to their
defying the national trend with almost all officer posts full at Portland.
prison library. Portland is a medium sized category C training and resettlement prison in South lack of purposeful activity. The current governor, who took over in 2020, had There had however, been problems with recruiting sufficient mental health staff of prisoners than usual told us they have mental health difficulties. This may in Although leaders had worked hard to reduce levels of violence which had, in the past had been particularly high, there was more work to be done to continue to source of many incidents.
problems with drugs and violence. lost its way, struggling with high levels of violence, poor living conditions and a part have led to levels of self-harm that had increased since the last inspection Although leaders had worked hard to reduce levels of violence which had, in the source of many incidents. Staff had worked hard to ramp up purposeful activity release. In turn, this could lead to less debt, fewer incidents of violence and
No public contact details available.
Derived signal — not a judgement. How it's calculated
What the score is responding to:
This facility scores 17. The national average across 584 scored United Kingdom facilities is 4 — 13 points above national average.
Same country, matched on type + security level where possible.
What should the prison do? We want the governor to read the report we wrote about HMP & YOI Portland and make a plan. The plan should tell us how they will fix the problems at HMP & YOI Portland and make things better for prisoners. What do we want to happen? We want the prison to sort out the problems with drugs and violence. We want the prison to do more to help prisoners who might harm themselves. You can find the report we wrote in the prison library. We want patients to get health care that is safe. We want prisoners to get more support to see and speak to their family and friends. We want all prisoners to get enough help before they leave the prison, with things like finding somewhere to live. We want prisoners to be able to speak to an officer who knows them regularly. We want all prisoners to be treated fairly. We want prisoners with physical disabilities to get the support they need. What will we do? We will come back in a few years to check how well the prison is doing. We will write a report to tell people what we find. If you have any questions, please write to us: HM Inspectorate of Prisons 3rd floor 10 South Colonnade Canary Wharf London E14 4PU
Portland is a medium sized category C training and resettlement prison in South Dorset, which at the time of our inspection held 512 prisoners. The jail had a young population of which 14% were under 21, and nearly half were under 30. When HMI Prisons last inspected Portland in 2019, we found a prison that had lost its way, struggling with high levels of violence, poor living conditions and a lack of purposeful activity. The current governor, who took over in 2020, had begun an impressive transformation. He and his senior team were visible around the jail and comments in our staff survey were positive about the changes they had made. This was reflected in the prison’s excellent self- assessment report (SAR), which showed that the senior team had a very good understanding of the prison’s strengths and weakness alongside credible and impressive plans to make improvements. Leaders had successfully challenged and begun to change the culture at Portland, improving consultation with the staff team and addressing negative behaviour. There had also been a concerted effort to improve recruitment, defying the national trend with almost all officer posts full at Portland. There had however, been problems with recruiting sufficient mental health staff and this was a particularly serious issue in Portland, where a greater proportion of prisoners than usual told us they have mental health difficulties. This may in part have led to levels of self-harm that had increased since the last inspection and were higher than similar jails. Although leaders had worked hard to reduce levels of violence which had, in the past had been particularly high, there was more work to be done to continue to bear down on the causes. Specifically, the accrual of debt appeared to be the source of many incidents. Staff had worked hard to ramp up purposeful activity and it was good to see that all but a few prisoners were able to work or attend education. Many, however, were frustrated by the levels of pay which, at £11 per week, was low, particularly as almost all work was part time. The prison served a particularly deprived population of which nearly 39% were care leavers, many of whom did not get money sent in and were reliant on what they could earn in prison. Frustration over low wages had been compounded by recent increases in the prices of canteen goods. For many of these prisoners, Portland was a long way from home, making visits difficult and adding to their sense of isolation. Progress towards opening up workshops and classrooms was hampered by staff shortages, leaving some of the good facilities in the jail were underused. We were particularly impressed by many of the middle leaders and custody managers, who had been given responsibility for making improvements and who were encouraged to innovate by the senior leadership team. Portland has come a long way since our last inspection and the staff team should be proud of the progress they have made. Leaders will need to maintain focus on the prison’s primary role as a training and resettlement jail, in which men are working on or learning the skills and habits that they need to be successful when they are released. This means a much larger proportion in full- time education or work in a regime that better prepares prisoners for eventual release. In turn, this could lead to less debt, fewer incidents of violence and improved mental health, particularly if the prison can overcome difficulties recruiting enough mental health staff. Charlie Taylor HM Chief Inspector of Prisons September 2022
HM Inspectorate of Prisons (HMIP) and HM Inspectorate of Probation for England and Wales are independent inspectorates which provide scrutiny of the conditions for, and treatment of prisoners and offenders. They report their findings for prisons, Young Offender Institutions and effectiveness of the work of probation, Community Rehabilitation Companies (CRCs) and youth offending services across England and Wales to Ministry of Justice (MoJ) and Her Majesty’s Prison and Probation Service (HMPPS). In response to the report HMPPS / MoJ are required to draft a robust and timely action plan to address the recommendations. The action plan confirms whether recommendations are agreed, partly agreed or not agreed (see categorisations below). Where a recommendation is agreed or partly agreed, the action plans provides specific steps and actions to address these. Actions are clear, measurable, achievable and relevant with the owner and timescale of each step clearly identified. Action plans are sent to HMIP and published on the HMPPS web based Prison Finder. Progress against the implementation and delivery of the action plans will also be monitored and reported on. Term Definition Additional comment Agreed All of the recommendation is agreed with, can be achieved and is affordable. The response should clearly explain how the recommendation will be achieved along with timescales. Actions should be as SMART (Specific, Measurable, Achievable, Realistic and Time-bound) as possible. Actions should be specific enough to be tracked for progress. Partly Agreed Only part of the recommendation is agreed with, is achievable, affordable and will be implemented. This might be because we cannot implement the whole recommendation because of commissioning, policy, operational or affordability reasons. The response must state clearly which part of the recommendation will be implemented along with SMART actions and tracked for progress. There must be an explanation of why we cannot fully agree the recommendation - this must state clearly whether this is due to commissioning, policy, operational or affordability reasons. Not Agreed The recommendation is not agreed and will not be implemented. This might be because of commissioning, policy, operational or affordability reasons. The response must clearly state the reasons why we have chosen this option. There must be an explanation of why we cannot agree the recommendation - this must state clearly whether this is due to commissioning, policy, operational or affordability reasons. ACTION PLAN: HMCIP REPORT ESTABLISHMENT: HMP/YOI Portland 1. Rec No 2. Recommendation 3. Agreed/ Partly Agreed/ Not Agreed 4. Response Action Taken/Planned 5. Responsible Owner 6. Target Date
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World Prisons. (2026). HM Prison Portland. Retrieved July 21, 2026, from https://worldprisons.com/prisons/hm-prison-portland
"HM Prison Portland." World Prisons. Accessed July 21, 2026. https://worldprisons.com/prisons/hm-prison-portland.
@misc{worldprisons-hm-prison-portland,
author = {{World Prisons}},
title = {HM Prison Portland},
year = {2026},
url = {https://worldprisons.com/prisons/hm-prison-portland},
urldate = {2026-07-21}
}