Violence in Prisons Estimator

The estimates are not used as the sole source for any decision - they are always considered alongside other information, such as the individual's incident history and other risk assessments. This tool has been designed to help prison staff to quickly identify whether an offender is likely to be involved in violence whilst in custody and how frequently, based on their previous involvement in violent incidents and their age.

The estimates are not used as the sole source in any decision-making. However, there are a range of mechanisms whereby offenders can appeal a decision that has been made about them. This includes prisons' internal complaints system, where offenders may submit formal complaints within the prison. They may also seek assistance from the Independent Monitoring Board (IMB), an independent body that can advocate on thei...

Each offender in custody's age and features describing their custodial assault history (relating only to assaults which have occurred in custody), such as their assault rate.