Steve Dagworthy had never received so much as a school detention when, in 2009, he was escorted into HMP Chelmsford to begin a six-year sentence for fraud. Until then, the 44-year-old had lived a quiet, middle-class existence with his wife and two children in Essex, where he worked as a financial broker.

Prison was an environment he knew only from television and he was staggered by just how little his lawyers had prepared him for life behind bars.

The Telegraph London