The Ministry of Justice says it has systems in place to deal with perpetrators quickly with serious incidents referred to the police for prosecution. They go on to say:
"The prison assault rate has fallen over the last 5 years and the current rate of assaults is the lowest since 2004.
We are committed to open and transparent reporting of data relating to deaths in custody, self-harm and assaults. It remains a priority to reduce the number of deaths and violence in custody. Prisons take the responsibility of keeping prisoners, staff and visitors safe extremely seriously.
Strenuous efforts are made to learn from each death and improve our understanding and procedures for caring for prisoners."
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