Dartmoor Jail 'closing' after dangerously high levels of radioactive gas detected
![Dartmoor Jail 'closing' after dangerously high levels of radioactive gas detected](https://i2-prod.mirror.co.uk/incoming/article33268578.ece/ALTERNATES/s615/0_Dartmoor-Prison-Princetown-Devon-UK.jpg)
The Prison Officers' Association said 175 inmates will be temporarily moved from Dartmoor owing to the discovery of the odourless radioactive gas radon which is a leading cause of lung cancer