Prisoners are ‘baking’ in cells in UK prisons (Credits: Getty Images) Inmates in some of the UK’s oldest prisons say they are no longer being punished but ‘tortured’ as they are locked in their baking cells for 22 hours a day in the heatwaves. Prisoners at HMP Chelmsford, built in 1825, say they were left on the brink of heat exhaustion in the latest heatwave which saw highs of 36C – the hottest June day on record. A mum of one of the inmates told Metro she had dropped over some cooler clothes for her son to wear, but they did not reach him until after the heatwave as officers told her it was ‘too hot for the sniffer dogs to work’. Her son was only meant to be in HMP Chelmsford, a category B prison, for 10 days following his sentencing for breaching bail conditions, while a space in a lowe