ADR UK (Administrative Data Research UK) is a UK-wide partnership that gives accredited researchers secure access to de-identified, linked government administrative data — held not in a conventional downloadable repository, but inside supervised Trusted Research Environments (TREs). For social scientists, this matters because it is a distinct access route: the data never leaves government custody, and the researcher, not the dataset, is what gets vetted and admitted.
ADR UK is a partnership of four national bodies — ADR England, ADR Scotland, ADR Wales and ADR Northern Ireland — together with the Office for National Statistics (ONS), coordinated by a UK-wide Strategic Hub and funded by the Economic and Social Research Council (ESRC), part of UK Research and Innovation (UKRI).
- What is ADR UK?
- How does ADR UK access differ from repository deposit?
- What is the Five Safes model and what is a Trusted Research Environment?
- Who is eligible, and how does accreditation work?
- How is ADR UK funded and governed?
- Frequently asked questions
- What this means for research administrators
What is ADR UK?
ADR UK is the mechanism by which public sector administrative data — records originally collected for tax, benefits, education, health or justice administration, not for research — is linked, de-identified and made available for social science research in the public interest. It commissions flagship linked datasets, funds research using them, and maintains a public data catalogue describing what is available and to whom.
The partnership operates under the Digital Economy Act 2017, which created the legal gateway allowing UK government bodies to share de-identified data with accredited researchers for statistical research purposes. This is the statutory basis that distinguishes ADR UK access from a voluntary data-sharing agreement between two universities.
How does ADR UK access differ from conventional repository deposit?
Most research data infrastructure — repositories, DataCite-indexed archives, institutional data stores — is built around deposit and download: a dataset is prepared, described with metadata, and released for reuse under a licence. ADR UK’s model inverts this. The data is never released to the researcher’s own machine; instead, the researcher is admitted into a controlled environment where the data already resides.
This is best understood as “FAIR-adjacent” rather than FAIR-compliant in the open-repository sense: the data is findable (via the catalogue) and, under approval, accessible, but interoperability and reusability are deliberately constrained by design, because the underlying records are personal and sensitive at source. The table below maps the three routes UK researchers commonly encounter.
| Route | Access model | Typical data | Governing framework |
|---|---|---|---|
| ADR UK | Supervised Trusted Research Environment (TRE); no download | Linked cross-government administrative data (education, benefits, justice, tax) | Digital Economy Act 2017; Five Safes |
| NHS Secure Data Environments | Supervised SDE; “dissemination by exception” | NHS health and social care records | NHS England’s 2022 Secure Data Environment policy |
| UK Data Service | Deposit/download under end-user licence | Social surveys, census, cross-national socioeconomic data | ESRC-funded repository terms |
The practical consequence for a social scientist: an application to ADR UK is an application for supervised admission to a workspace, not a request for a file transfer.
What is the Five Safes model and what is a Trusted Research Environment?
ADR UK access is governed by the Five Safes model, a risk-management framework originally developed by the ONS and now used across UK administrative data infrastructure, including NHS Secure Data Environments. It manages disclosure risk across five dimensions rather than relying on a single control.
- Safe people — only accredited, trained researchers gain access.
- Safe projects — proposals are approved for public benefit and ethical soundness.
- Safe data — records are de-identified before linkage.
- Safe settings — analysis happens only inside a Trusted Research Environment, a monitored, non-internet-connected computing environment.
- Safe outputs — every result is disclosure-checked before it can leave the TRE.
Each of the four UK nations operates its own TRE, accessed in person at a designated safe location or via a secure remote connection, using approved statistical software such as R, Python, SPSS or Stata.
Who is eligible, and how does accreditation work?
Eligibility runs through the researcher, not the institution. Under the Digital Economy Act 2017 accreditation process, an applicant must complete Safe Researcher Training and pass an assessment before an accreditation panel will approve them; this status is valid for five years. Accreditation alone does not grant data access — a specific research project must then be separately approved against public-benefit, feasibility and ethics criteria before a TRE account is issued.
For institutions supporting early-career or interdisciplinary social scientists, this two-stage gate (accredit the person, then approve the project) is the single most common point of delay administrators should plan for, since neither step can be skipped or run in parallel with data linkage preparation.
How is ADR UK funded and governed?
ADR UK began as an ESRC investment running from July 2018. In September 2020, UKRI, the Department for Business, Energy and Industrial Strategy and HM Treasury approved £15.3 million for the 2021/22 financial year — the first year of a planned five-year investment. In September 2021, the remaining £90.12 million of that investment was secured from UK government to extend the programme to March 2026. In July 2025, UKRI confirmed a further £168 million investment to continue the programme beyond 2026, securing its next phase.
Governance sits with the UK-wide Strategic Hub, which coordinates the four national partnerships, engages with government departments to secure data access agreements, and administers the dedicated research grant fund — distinct from the accreditation function, which remains with the statutory panel under the Digital Economy Act 2017.
Frequently asked questions
Is ADR UK the same thing as “alternative dispute resolution”?
No. ADR UK in a research-administration context refers exclusively to Administrative Data Research UK, the government-data access partnership described here. “ADR” also commonly abbreviates alternative dispute resolution in a legal context — an unrelated field covering mediation and arbitration — and searchers should check context before assuming which meaning applies.
What kind of data does ADR UK provide access to?
ADR UK provides access to linked, de-identified administrative data generated by government departments — including education records, benefits and employment data, and justice-system data — rather than data collected specifically for research, such as surveys. Its public data catalogue and flagship datasets list what is currently available to accredited researchers.
Is ADR UK data FAIR or open access?
ADR UK data is not open access and is only FAIR-adjacent: it is findable through the catalogue and accessible to accredited, approved researchers, but it cannot be freely downloaded, reused or redistributed, because the source records are personal and disclosive. Outputs, not raw data, are what eventually leave the Trusted Research Environment.
How long does the ADR UK access process take?
Timelines vary, but researchers should expect two sequential approval stages: Safe Researcher Training and accreditation first, then a separate project-specific approval before a Trusted Research Environment account is issued. Institutions should budget for both stages when planning grant timelines, since data linkage itself begins only after project approval.
What this means for research administrators and institutions
For institutions supporting quantitative social science, ADR UK access is a compliance and planning question as much as a technical one. Research offices should treat Safe Researcher Training and accreditation as a standing institutional capability — something built into PhD and postdoctoral training pipelines — rather than a one-off hurdle discovered mid-grant. Because accreditation is personal and portable across five years, institutions that pre-accredit staff gain a durable advantage in bidding for ADR UK-linked funding calls.
The broader signal is that “FAIR-adjacent” access, governed by statute and a risk framework rather than a licence, is becoming a parallel track alongside conventional repository deposit — one that other data-holding sectors, including health, are converging on through NHS Secure Data Environments. Research administrators who understand both tracks are better placed to route projects to the correct infrastructure the first time.
