This covers AI applied to prison operations, a category distinct from offender risk assessment. Where OASys predicts what someone might do after release, these systems address what happens inside.

The better-evidenced of the two is language analysis of seized mobile phones. HM Prison and Probation Service digitally scans the contents of phones seized from prisoners and applies AI language analysis to flag code words and messages indicating violence, escape plans or contraband smuggling, for staff to act on. This has been trialled across the prison estate in England and Wales and had analysed over 8.6 million messages at the point of announcement in July 2025.

The second is an AI violence predictor, announced by the Lord Chancellor in July 2025 as part of the Ministry of Justice AI Action Plan. It is described as analysing factors including a prisoner's age and previous involvement in violent incidents in custody, to predict the risk an individual poses and assess threat levels on wings, with officers using it to move prisoners or apply tighter supervision before violence escalates. The announcement does not state that the tool has been trialled or deployed, and no deployment evidence has been found, so it should be read as announced rather than operational.

Both rest on a single official source, and no external oversight body has been named for either.