The first part of this series took you inside Britain's toughest prison, Bell Marsh, where you met some of its most notorious criminals. In this second part of the series, witness how violence and revenge between rival gangs defines life inside Bell Marsh for both the prisoners and the guards. As they fight to control the prison's drug trade, gangs engage in a vicious cycle of brutality and retribution, a never-ending war that inflicts terrible costs.

The first part of this series took you inside Britain's toughest prison, Bell Marsh, where you met some of its most notorious criminals. In this second part of the series, witness how violence and revenge between rival gangs defines life inside Bell Marsh for both the prisoners and the guards. As they fight to control the prison's drug trade, gangs engage in a vicious cycle of brutality and retribution, a never-ending war that inflicts terrible costs.