The UK prison system is facing a significant crisis according to a recent report from Parliament’s Committee of Public Accounts. Released in March 2025, the fifteenth report of the 2024-25 session entitled “Prison estate capacity” paints a concerning picture of overcrowding, delayed expansion plans, and deteriorating conditions that are affecting both prisoner rehabilitation and value for money for taxpayers. The report can be found here
A System at Breaking Point
The report reveals that the Ministry of Justice (MoJ) and HM Prison and Probation Service (HMPPS) have failed to increase prison capacity in line with demand, creating a prison estate in crisis. As of September 2024, the adult male prison estate was operating at between 98.0% and 99.7% occupancy – dangerously close to complete capacity. HMPPS itself cites 95% as the maximum occupancy level at which it can run the estate efficiently.
Perhaps most concerning is that approximately one-quarter of prisoners are currently doubled up in cells designed for one person, often with an open toilet – conditions that the report suggests contribute to increased rates of violence and self-harm. The rate of assaults increased significantly in the year to September 2024, with fights between prisoners up by 14% and attacks on staff up by 19%.
Ambitious Plans, Poor Execution
In 2021, the MoJ committed to delivering 20,000 additional prison places by the mid-2020s. However, by September 2024, only 6,518 of these places had been delivered. The report indicates that the remaining places are now expected to be completed around five years later than planned, by 2031, and at a cost of at least £4.2 billion more than originally estimated – an 80% increase.
The committee concluded that the original plans were unrealistic, with assumptions that planning permission for new prisons could be obtained in just 26 weeks. The MoJ attributed delays to planning issues, noting that one new prison has been awaiting approval for over three years.
Short-Term Solutions with Long-Term Consequences
To manage the immediate crisis, the government has had to implement emergency measures, including early release schemes. In September 2024, the government implemented a scheme (SDS40) that reduced the automatic release point for some prisoners from 50% to 40% of their sentence.
Despite these measures, MoJ forecasts suggest the system will run out of capacity again by early 2026 and be short by 5,400 prison places by November 2027. The government is now relying on the recommendations of an independent Sentencing Review to prevent another capacity crisis.
Impact on Rehabilitation and Reoffending
One of the most significant concerns raised in the report is how the capacity crisis is undermining efforts to rehabilitate offenders. Overcrowding has created barriers to prisoners accessing education and drug treatment programs, which are essential for rehabilitation. The report notes that reoffending in England and Wales costs society approximately £18 billion per year.
The crisis has also put additional pressure on the probation service, which is already understaffed. As of September 2024, there were 5,413 full-time equivalent probation officers in post against a target of 7,115 – a staffing level of just 76%. The service is expected to need to supervise around 20% more prison leavers by 2028 compared to December 2023.
Recommendations for Reform
The Committee has made several recommendations to address these issues, including:
- Ensuring lessons learned from current projects are incorporated into future estate plans
- Producing a business case to address the prison estate maintenance backlog more rapidly
- Evaluating the impact of prison capacity pressures on risk assessments, violence levels, and access to rehabilitation services
- Developing a plan to improve the rehabilitative environment in prisons
- Setting targets to reduce reoffending rates and forecasting the resulting reduction in demand for prison places
Looking Forward
The report makes clear that the prison capacity crisis represents a systemic failure that requires urgent attention. Without significant reform, the UK risks continuing a cycle of overcrowding, poor rehabilitation outcomes, and high reoffending rates.
As the Lord Chancellor’s December 2024 announcement of MoJ’s 10-year prison capacity strategy projected an increase in the prison population by an average of 3,000 annually in coming years, addressing these issues has never been more pressing.
The Committee’s report serves as a stark warning that without effective action, the UK’s prison system will continue to operate in crisis mode, undermining justice outcomes and representing poor value for money for taxpayers.
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