United Kingdom, Thames Valley
Thames Valley Police
DARAT (Domestic Abuse Risk Assessment Tool, machine learning), supplied by Solvarithm Ltd (contractor)
In developmentOfficial publicationPAI-68632146
- Body
- Thames Valley Police
- Country
- United Kingdom
- Area
- Thames Valley
- Technology
- DARAT (Domestic Abuse Risk Assessment Tool, machine learning)
- Supplier
- Solvarithm Ltd (contractor)
- Status
- In development
Being researched, built, tested or marketed for police use. No police body has confirmed using it. - Stage
- On the horizon
- Since
- Not known
- Legal basis
- Not stated in the source
- Oversight
- A Data Ethics Committee of public members and academics has reviewed the model three times, according to the algorithmic transparency record. A data protection impact assessment was ongoing, with an algorithmic impact assessment and an equality impact assessment planned before implementation.
- Evidence
- Official publication
Police force, government department or public body publication - Source
- GOV.UK algorithmic transparency record, 14 October 2022
- Last checked
- Record code
PAI-68632146
Notes
The algorithmic transparency record for the Hampshire and Thames Valley Police Domestic Abuse Risk Assessment Tool (DARAT), first published on 14 October 2022, describes a machine learning classification tool, currently a random forest classifier, that forecasts whether harm will occur in the year after a domestic abuse incident and sorts risk into standard, medium or high. It is designed to supplement the existing DASH assessment, with a supervisory officer seeing the score and its basis. The record says DARAT "is not currently used for decision making" and that refinement, bias checking and testing remain before trial and implementation. It reports an initial model that improves overall classification accuracy by 20 percentage points over DASH and is nearly three times as sensitive to high-harm outcomes; these are the developers' figures. The responsible team is the Thames Valley Violence Reduction Unit data and targeting team, and the developer is named as a contractor, Solvarithm Ltd. The two forces have separate tools built on each force's records. No later source read shows the tool entering use.
Other systems used by Thames Valley Police
| Deployment | Country | Supplier | Since | Status | Checked |
|---|---|---|---|---|---|
| Thames Valley PoliceLive Facial Recognition | United KingdomThames Valley, first deployed in Oxford city centre | — | 2025 | Operational | |
| Thames Valley PoliceAI Emergency and Non-Emergency Call Triage | United KingdomThames Valley | Salesforce (Agentforce 360 platform), according to Salesforce | 2025 | Operational |
DARAT (Domestic Abuse Risk Assessment Tool, machine learning) elsewhere in United Kingdom
See them in the tracker| Deployment | Country | Supplier | Since | Status | Checked |
|---|---|---|---|---|---|
| Avon and Somerset PolicePredictive Analytics Programme | United KingdomAvon and Somerset | Built in-house | 2017 | Operational | |
| Bristol City CouncilThink Family Database and child exploitation risk models | United KingdomBristol | Not specified | 2016 | Discontinued | |
| Ministry of JusticeIndividual Risk Scoring | United KingdomEngland and Wales (research phase) | Developed in-house (Ministry of Justice data science team) | 2023 | Proposed | |
| Essex PoliceKnife Crime and Violence Model (Fearless Futures) | United KingdomEssex | — | — | Trial | |
| Lincolnshire PoliceCESIUM child exploitation risk identification | United KingdomLincolnshire | Trilateral Research (CESIUM) | 2023 | Operational | |
| Nottinghamshire PoliceCESIUM child exploitation risk identification | United KingdomNottinghamshire | Trilateral Research | 2024 | Trial | |
| West Midlands PoliceStalking and harassment harm escalation model | United KingdomWest Midlands | — | — | Operational | |
| West Yorkshire PoliceDomestic Abuse Assessment Tool (machine learning risk prediction) | United KingdomWest Yorkshire | — | — | Proposed | |
| Metropolitan PoliceStalking Threat Assessment Centre machine learning triage | United KingdomLondon | — | — | Operational | |
| Metropolitan PoliceGangs Violence Matrix (individual risk and harm scoring database) | United KingdomLondon | — | 2012 | Discontinued |