Data First Prisoner Custodial Journey Dataset
Dataset
Summary
Citation:
CITATION INCOMPLETE
Documentation
Associated Media:
Description:
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
Coverage
Spatial:
United Kingdom,Wales,United Kingdom,England
Typical Age Range:
0-120
Follow Up:
OTHER
Pathway:
The person identifiers in the original data (offender_id and
offender_id_display) are known to be unreliable and do not consistently and
comprehensively allow the same offender (person) to be identified across
distinct prison terms. While prison staff make an attempt to connect records to
previous incarcerations at reception, many links are missed, 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.
Provenance
Origin
Sources:
OTHER
Collection Situations:
OTHER
Temporal
Accrual Periodicity:
DAILY
Distribution Release Date:
01 January 2022
Start Date:
01 January 2011
End Date:
30 September 2021
Time Lag:
OTHER
Accessibility
Access
Access Service:
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.
Access Request Cost:
Data provision is free from SAIL. Overall project costing depends on the number
of people that require access to the SAIL Gateway, the activities that SAIL
needs to complete (e.g. loading non-standard datasets), data refreshes,
analytical work required, disclosure control process, and special case
technological requirements.
Jurisdictions:
GB-WLS
Data Controller:
SAIL Databank
Data Processor:
SAIL Databank
Usage
Data Use Limitations:
GENERAL RESEARCH USE
Resource Creators:
Ministry of Justice
Format and Standards
Vocabulary Encoding Schemes:
LOCAL
Conforms To:
LOCAL
Languages:
en
Formats:
SQL Database Table
Enrichment and Linkage
Qualified Relations:
Does not have SAIL anonymised linkage field.
Observations
Statistical Population
Population Description
Population Size
Measured Property
Observation Date
EVENTS
Activities, Cases, and People
3000000
Count
30 September 2021