What the ATRS actually requires
The Algorithmic Transparency Recording Standard (ATRS) is a UK government template for publishing a standard-format public record whenever a public-sector body uses an algorithmic tool, including AI systems, in a way that affects the public or a decision about them. The standard was first published in November 2021 by the Cabinet Office's Central Digital and Data Office (CDDO), working with the Centre for Data Ethics and Innovation (CDEI), with piloting across public sector teams beginning in January 2022, as set out in the original GOV.UK announcement and a subsequent pilot update. ATRS is now run by the Government Digital Service (GDS) within the Department for Science, Innovation and Technology (DSIT), following CDDO's merger into the reformed GDS in early 2025. See the Algorithmic Transparency Recording Standard Hub.
Each record follows a fixed structure. Tier 1 is a short, plain-language summary of what the tool is and why it is used. Tier 2 is more detailed and covers five areas: who owns and is accountable for the tool, a description of the tool and the rationale for using it, the wider decision-making process and the human oversight built around it, the technical specification and the data used to build and run it, and the risks identified together with mitigations and any impact assessments carried out. This structure is set out in the official ATRS guidance.
Is it mandatory, and since when
Yes, but the mandate is narrower and more recent than the "government AI transparency register" framing sometimes implies. On 17 December 2024, the government published its ATRS mandatory scope and exemptions policy, which converted ATRS from a recommended practice into a requirement for organisations within its defined scope. A GDS blog post from May 2025, Making the Algorithmic Transparency Recording Standard (ATRS) mandatory across government, confirms that publication is now mandatory across central government, with rollout continuing to further arms-length bodies (ALBs) and other parts of the public sector over time.
The actual current scope, and what it excludes
The mandatory scope and exemptions policy defines "algorithmic tool" broadly, as any product, application or device that supports or solves a specific problem using complex algorithms, a definition intended to capture AI systems and statistical models alike. A tool falls into mandatory scope if it meets either of two tests: it has a significant influence on a decision-making process with public effect, or it directly interacts with the general public. The requirement applies once a tool reaches Beta/Pilot or Production stage, not at early prototyping.
The organisations covered are ministerial and non-ministerial government departments, plus ALBs that deliver public or frontline services or routinely interact with the public. Exemptions are modelled on Freedom of Information Act categories such as national security, commercial sensitivity and intellectual property, though not on the personal-data or cost exemptions. Importantly, the mandate does not currently extend to devolved administrations, local government or police forces: the hub itself describes ATRS as "recommended" rather than required for the wider public sector, so publication by a council or a devolved body is currently voluntary, even though some have chosen to publish records anyway. That is a meaningfully narrower scope than "all UK public bodies," and worth checking carefully against any specific customer's status before assuming a legal obligation applies.
How many ATRS records have actually been published
The most recent verifiable figure comes from GDS's own account. As of its May 2025 blog post, the ATRS repository on GOV.UK held 59 published records in total, with 53 of those added in the preceding twelve months. In the few months immediately before that post, GDS said 26 of the newly published records came from central government departments and their ALBs and 10 came from devolved administrations and local government, a shorter recent window rather than a complete breakdown of the full twelve-month, 53-record count. That total is dated to May 2025 and is likely to have grown since, so treat it as a historical marker rather than today's figure.
Specific, named records that have actually been published in the repository include the Department for Work and Pensions' Child Maintenance Service Predictive Analytics Compliance tool, used to help caseworkers reduce payment breakdowns, and its CMG Return Letters Processing tool, a computer vision system that extracts addresses and reference numbers from correspondence; Ofsted's Survey Summarisation Tool, which uses a large language model to help inspectors summarise survey responses and flag safeguarding concerns; the Department for Transport's Maritime and Coastguard Agency Proview Proctoring Tool, used to check conduct during online exams, and the DVLA's Contact Centre Natural Language IVR, which routes calls based on what a customer says; the Ministry of Housing, Communities and Local Government's LGSCO Chatbot; HM Revenue and Customs' Organisational Listening Tool, which collates customer feedback; NHS England's Electronic Prescription Service Assist Me; the Care Quality Commission's Risk Categorisation tool; the Department for Energy Security and Net Zero's Heat Pump Suitability Tool; and Newcastle City Council's Magic Notes, used by adult social care staff to record case notes. These are drawn directly from the published repository rather than estimated.
How it compares to the Netherlands' Algoritmeregister
The Dutch Algoritmeregister is the closest international comparator and, unlike ATRS, has been built around broad participation from national ministries down to individual municipalities from an earlier stage, whereas the UK's mandate currently centres on central government and qualifying ALBs, with devolved administrations and local authorities still on a voluntary footing. AIRiskAware covers the Dutch register in detail in its dedicated article on the Netherlands' algorithm register and transparency regime, so this is noted here only as a point of contrast rather than repeated in full.
What this means for a private-sector supplier selling into UK government
If a supplier's tool will run inside a UK government department or an in-scope ALB, and it either influences a decision with public effect or interacts directly with the public, the customer will very likely need an ATRS record before or shortly after go-live, and the supplier will be the practical source of much of the content that record requires. In practice, expect the public-sector customer's information governance, data protection or AI assurance team to come back and ask the supplier for a plain-language description of what the tool does and why it was procured, suitable for a non-technical public audience; a description of the data used to build and to run the tool, including whether personal data is involved, its provenance and any third-party or licensing restrictions on disclosing it; the model or system type and version, and whether it is off-the-shelf, fine-tuned or bespoke; a clear account of where a human sits in the decision loop, what oversight or override exists, and how a member of the public could challenge or seek review of an outcome; and a summary of testing, performance and any fairness or bias assessment carried out, together with identified risks and mitigations. Because the completed record is published under the department's or ALB's name and accountable owner, suppliers should expect these questions to arrive as a documented, formal information request during onboarding or contract assurance rather than as an informal one-off, and to be asked to stand behind the accuracy of what is disclosed about their own tool.
Primary sources: Algorithmic Transparency Recording Standard Hub, GOV.UK · UK government publishes pioneering standard for algorithmic transparency, GOV.UK, November 2021 · Piloting the national algorithmic transparency standard, RTAU blog, June 2022 · Making the ATRS mandatory across government, GDS blog · ATRS mandatory scope and exemptions policy, GOV.UK · Algorithmic transparency records repository, GOV.UK · Guidance for organisations using the ATRS, GOV.UK
