Justice Data Lab

The Justice Data Lab pilot enables organisations working with offenders to access central re-offending data. This service will provide vital information to organisations supporting the rehabilitation of offenders and help them assess the impact of their work on reducing re-offending.

To use the service, organisations will need to complete and send, via a secure email address, the Data upload template with details of the offenders who they have worked with and information about the services they have provided.

Provided that the completed Data Upload Template meets the minimum criteria, the Justice Data Lab will then supply the one-year proven re-offending rate for that group, and that of a matched control group of similar offenders.

The results will be provided to the organisation in a clear and easy to understand format, with explanations of the key metrics, and any caveats and limitations necessary for interpretation of the results.

Justice Data Lab pilot statistics reports

Update on the Justice Data Lab service

The Justice Data Lab will continue to be piloted for another year. The service will continue to be free at the point of use, and the same service model will continue to operate, as detailed in our guidance.

Supporting documents

User journey document - information on what the justice data lab is, and how to use its services.

Data upload template – use this template to supply data to the justice data lab. Further descriptions of the variables requested are given, and there are key areas which must be filled in on the specific activities of the organisation in relation to offenders.

Methodology paper – this document gives details of the specific methodology used by justice data lab to generate the analysis

Privacy impact assessment – this is a detailed analysis of how an organisations’ data will be protected at all stages of a request to the justice data lab.


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