Question to the Ministry of Justice:

To ask the Secretary of State for Justice, with reference to his Department's policy paper entitled IA action plan for justice, published on 31 July 2025, what progress he has made in linking offender data through (a) BOLD and (b) Data First programmes.

Using ‘Splink’ (Splink: MoJ’s open source library for probabilistic record linkage at scale - GOV.UK), the Department has made significant progress in linking offender data through both the BOLD and Data First programmes, as follows:

1. Through BOLD: Data has been shared and linked across Government Departments and other agencies to produce 16 offender-related datasets linking cases and people across contact with the criminal courts, police, prisons, and probation services, drug treatment services, local authorities (in relation to homelessness) as well as assessments of offender risks and needs and child benefit. To date, these datasets have been used to address key critical evidence gaps in policy (leading to 8 offender-related analytical publications), and to develop new operational tools for frontline staff. Details on the BOLD programme and its outputs to date can be found at: Ministry of Justice: Better Outcomes through Linked Data (BOLD) - GOV.UK. More recently, BOLD have developed a software package, Laurium, which uses AI to extract structured insights from free-text data (like case notes), thereby extracting more value from linked datasets.

2. Through Data First: The Ministry of Justice has linked and shared eight justice datasets, connecting cases and people across civil, family and criminal courts, prisons, and probation services, as well as assessments of offender risks and needs. These datasets are made available to accredited academic researchers via trusted research environments, facilitating powerful new research insights both within individual domains, where repeat service users can be identified for the first time, as well as on end-to-end cross justice system journeys. To date, this has resulted in over 50 academic projects. Details on Data First datasets and outputs to date can be found at: Ministry of Justice: Data First - GOV.UK.