Last updated: 16 January 2026
Comparator
HMI Prisons survey aggregation metric that allows comparison of prisoner responses across different establishments. Comparators help identify how individual prisons perform relative to similar prisons or the estate average.
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Comparator
MQPL
Measuring the Quality of Prison Life - a survey tool used by researchers and HMI Prisons to assess prisoners' perceptions of their treatment and conditions. Results provide insights into the quality of prison life.