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Data First Prisoner Custodial Journey Dataset (PRIS)
Population Size
Years
2011 - 2021
Associated BioSamples
None/not available
Geographic coverage
United Kingdom
Wales
Lead time
2-6 months
Summary
Documentation
The prisoner dataset extracts from the Prison National Offender Management Information System (p-NOMIS) and the Offender Assessment System (OASys), operational databases used in prisons for the management of offenders.
Tables: NOMIS - One record per prisoner per custodial journey (i.e. each separate instance that a person was in prison during the period, but combining connected spells in custody, remand and recalls) providing details around their personal characteristics, main offence, sentence length, and release information.
OASys - One record per prisoner per assessment (prisoners may have more than one assessment per custodial journey). The OASys data only includes OASys records that have been linked to an offender in the NOMIS dataset.
Safety in Custody - One record per prisoner per incident
Keywords
Observations
Observed Node | Disambiguating Description | Measured Value | Measured Property | Observation Date |
|---|---|---|---|---|
Events | Activities, Cases, and People | 3000000 | Count | 29 Sep 2021 |
Provenance
and sometimes records are connected erroneously.
The estimated_offender_id has been assigned by Data First using a statistical model and the open source splink software. This allows data users to see which individuals have re-entered prisons on multiple occasions. Identifiable personal information used to derive estimated_offender_id is not shared and hashes are created for other IDs that appear outside of this dataset.
Young Offenders are included if resident at prisons or Young Offender Institutes (YOIs) that use p-NOMIS.
Structural Metadata
Details
08/10/2024
01/01/2022
Coverage
01/01/2011
29/09/2021
Accessibility
Data Access Request
The SAIL Databank is powered by the UK Secure e-Research Platform (UKSeRP). Following approval through safeguard processes, access to project-specific data within the secure environment is permitted using two-factor authentication.
Access for approved purposes and projects is to accredited researchers through the ONS Secure Research Service (SRS). The application form is available on gov.uk and governed by MoJ and HMCTS. Please see the application form guidance and the Data First user guide for more information on the process.