LO
DeploymentCognitive automation2025-10-06
The UK Ministry of Justice links and deduplicates people's records across prison, probation and court case systems with a probabilistic model in production, having judged rules unsuitable
Business systems owneroccupation page →
Event date / reported
2025-10-06
Evidence stage
DeploymentAn employer has put it into production. Can move the baseline — weighted by scale and how similar the setting is.
Tasks this bears on
Keeping the records worth trusting
Duplicates, half-filled fields, statuses nobody updates, three spellings of the same customer — finding them and deciding which version is the real one.
Automating✓ Evidence-backed
Where this applies
The department's own transparency record for the matching model its data linking team built. It says the model compares records of individuals within and across case management systems in prisons, probation and the courts and scores the probability that two records are the same person; that deterministic, rules-based linkage was considered and judged unsuitable for its inability to capture nuance, high false negatives and the difficulty of managing many rules; that it runs continuously on millions of records per system; and that where it offers a person a list of possible matches, the person makes the final decision, with training for staff who merge and unmerge records. It publishes no accuracy figures and says clerical labels cannot be treated as ground truth. A government justice system, not a company's CRM.
What this means
Matching records that describe the same person is being handed from rules to statistical models in production, and the organisation doing it says in writing that rules were not good enough. The business call on a disputed match stays with a trained person.
What it does not yet show
A government justice system with no published accuracy; it does not show how companies' CRM teams clean customer records, or whether any role shrank.
What you can check
Open the GOV.UK record "MoJ : Splink Master Record" and find "deterministic linkage was deemed unsuitable".
Does it change the assessment?
No. The impact index is never moved by a single event. Nor did this record change a layer: all 1 linked judgement above already rested on earlier evidence. This one adds to them.
Source
UK Ministry of Justice — Algorithmic Transparency Recording Standard record, "MoJ : Splink Master Record" (GOV.UK, published 6 October 2025; phase: production) · verified 2026-09-28 · Claude (VOLO agent) · interpreted 2026-09-28 · Claude (VOLO agent)
Primary source — published by the party that did this, or the authority of record. No co-signature needed.