What is Grendon & Spring Hill Prison Like? A Family Guide
Last reviewed: July 2026
Two very different prisons, one site
Although they share management and a rural site at Grendon Underwood, the two prisons do completely different jobs. Grendon holds a few hundred men, mostly serving long or indeterminate sentences, across small residential wings that each operate as a democratic therapeutic community. Men apply and are assessed for a place; they must genuinely want to engage, stay drug-free and commit to therapy for at least 18 months to get the benefit.
Spring Hill, established in 1953, holds men assessed as suitable for open conditions. Its regime is built around release on temporary licence (ROTL), community work placements and preparing men for life after custody.
Key facts at a glance
| Detail | HMP Grendon | HMP Spring Hill |
|---|---|---|
| Category | B (therapeutic community) | D (open) |
| Population | Roughly 230-240 men on small wings | Roughly 335 men |
| Focus | Intensive group therapy addressing offending | Resettlement, ROTL and work placements |
| How men arrive | Voluntary application and assessment | Recategorisation to category D |
What therapy at Grendon actually involves
Each wing at Grendon is a therapeutic community of around 40 men. The core of the week is small-group therapy several times a week, plus community meetings where men hold each other accountable for behaviour on the wing. Psychodrama, art therapy and education support the work. It is emotionally demanding – men explore childhood trauma, violence and the harm they have caused – and research over decades has linked completed Grendon therapy with reduced reoffending and violence. The atmosphere is calmer than almost any other category B prison, with strikingly good staff-prisoner relationships noted by HM Inspectorate of Prisons.
Life at Spring Hill
Spring Hill works like other open prisons: hostel-style accommodation, unlocked movement, on-site jobs and, for those approved, paid work and home leave in the community through ROTL. The freedom is conditional – any breach can mean an immediate return to closed conditions.
Progression and release
For men at Grendon, completing therapy strengthens parole and recategorisation cases, and many move on to open conditions such as Spring Hill next door. For men at Spring Hill, the route out is through demonstrated trust: clean drug tests, reliable ROTL and a solid release plan. Under the Sentencing Act 2026 earned-progression rules, engagement of exactly this kind now directly affects when many determinate-sentence prisoners are released, so time at either prison is an opportunity rather than a holding pattern. Sentence planning meetings are the place to push for the next step, and families can help by supporting home-leave arrangements and accommodation plans.
Visits and staying in touch
Visits at both prisons must be booked, and the rural location (between Aylesbury and Bicester) makes a car the practical option for most families. Both prisons run family days. See our guides to sending items to prisoners and going to prison for the basics.
1) “Grendon is a hospital.” It is a prison – but one organised entirely around therapy rather than containment.
2) “Men are sent to Grendon as punishment.” The opposite: men must apply, be assessed as suitable and genuinely commit.
3) “Open prison at Spring Hill means the sentence is over.” Men remain serving prisoners under strict licence conditions whenever they leave the site.
A note from experience
Prison Guide’s founder, Daniel Hockey, served a sentence himself, finishing in open conditions at HMP Ford, and wrote The Secret Prisoner (2021). His view on places like Grendon: if your loved one is serious about change and has enough time left to serve, an application to Grendon is one of the most constructive moves available in the system.
Frequently asked questions
How does someone get a place at Grendon?
By applying through their current prison’s offender management unit. Assessment looks at motivation, sentence length remaining and suitability for group therapy.
Does Grendon reduce reoffending?
Long-running research suggests men who complete substantial therapy at Grendon show reduced violence and reconviction compared with similar prisoners, which is why it remains a flagship of the system.
Where can I find official information?
Contact and visiting details are on GOV.UK for Grendon and Spring Hill, and research on therapeutic communities is available from the Prison Reform Trust.
