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Radon Exposure Fears in 42 UK Prisons
26 Mar
Summary
- Over 40 UK prison sites may have unsafe radon gas levels.
- Radon gas can increase the risk of developing lung cancer.
- Legal action is underway for exposure at multiple prisons.

The Ministry of Justice is investigating 42 prison and probation sites due to fears of unsafe radon gas exposure. Radon, a radioactive natural gas formed from decaying uranium, is known to increase the risk of lung cancer. At least 16 prisons have measured above-action levels of the gas, with figures rising from previous reports.
HMP Dartmoor was closed last year after radon levels ten times higher than recommended were recorded. Despite this, the government continues to spend millions annually on the empty prison due to a lease agreement. Legal action is progressing for former inmates and staff exposed to radon at multiple prisons, including HMP Exeter, Channings Wood, Lindholme, Portland, The Verne, and Dartmoor.
Regulations require mitigation measures if radon levels exceed 300 bq/m³ in workplaces and 200 bq/m³ in sleeping areas. Critics express concern over the Ministry of Justice's "worrying lack of urgency" in addressing these risks, especially as many affected prisons remain operational. The Ministry of Justice states that they routinely monitor radon levels and take action where elevated levels are identified.