Wednesday, 7 January 2026

Prison Problems Old and New

 

HMP Dartmoor was first built because overcrowding, poor sanitation and lack of fresh air on the floating hulks off Plymouth were causing so many prisoners of war to die on them. 220 years on, Parliament’s spending watchdog has roundly condemned a decision to keep the prison open despite the prison service knowing for years that it’s “choked with radon gas with all the health risks that entailed”.  According to the Health Security Agency (HSA) , if people breathe in high levels of radon over long periods of time this exposure can lead to damage to the sensitive cells of our lungs which increases the risk of lung cancer.

The prison has lain empty for 16 months pending a decision on exactly what’s needed to protect those who will live and work there from those risks- and whether it’s worth fixing at all.

The Public Accounts Committee (PAC) have concentrated their fire on the MoJ’s poor negotiation of the lease extension with the Duchy of Cornwall who own the prison.  

But there are surely lessons to learn too in the way the health risks to prisoners and staff have been identified, monitored and mitigated since raised levels of radon were first detected- certainly in 2020, maybe before. There’s not a clear timeline with many of the documents shared with MPs by the MoJ unpublished because of alleged commercial sensitivities.

Dartmoor’s local monitoring board (IMB) has reported that after the 2020 monitoring found staff might have experienced elevated exposures to radon, “due to regrettable delays in escalating the issue in the MoJ” internal mitigations were not put in place for two years. The monitoring of residential wings didn’t start until 2023. In that year  Inspectors found prisoners at Dartmoor were often not allowed outside more than twice a week, which on the face of it could mean an increased level of exposure to any excess radon in cells.

As the IMB put it, “after seven months of decanting, pausing, decanting and recanting”, significantly higher radon levels found in wing atriums led to the prison being closed.

Back in 2015 the HSA recommended that “If you have high levels of radon at home, you should take action”.  Its not clear that the prison service did so or did as much as they should at Dartmoor.

Meanwhile, another parliamentary committee has revealed “a deeply worrying picture” of HMP Millsike , which opened last March. Local monitors have reported on severe safety concerns, some prisoners spending up to 23 hours per day in their cell, and high levels of self-harm. The Justice committee say rigorous scrutiny is necessary to ensure prisoners are treated safely, fairly and humanely during the critical early years of operation.

As the Dartmoor debacle shows, that’s just as true of prisons in the later stages of their life.