Six celebrities are participating in a four-part constructed documentary series where they will be locked up as prisoners for eight days, in decommissioned HMP Shrewsbury, to investigate what life is really like behind bars.

The six well-known inmates will be incarcerated with a variety of real ex-criminals, including those who have served long sentences for serious crimes - although all are now reformed and have agreed to re-enter prison for this series. The well-known inmates will have the opportunity to interrogate their cellmates on their prison experiences and former crimes - as well as examine the impact of the system on them – for better or worse.

Run by a former prison governor, with 20 years' experience in some of the UK's toughest prisons, and former prison officers, the inmates will live by current UK prison rules.