HMP Dorchester Guided Tour 4th September 12.00pm A guided tour of former HMP Prison Dorchester 4th September 12.00pm £15.00 Out of stock. An opportunity to explore the former HMP Dorchester with Eddie a former officer of the prison. View the wings, kitchens and chapel, hear how the prisoners lived, Eddie will tell you all you need to know. Tour lasts around 1 and a half hours. Secure parking on site included.