Linking data for future research discoveries
A new phase
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Strength in partnership
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Simplified data access
Read full storyWhat is UK LLC?
UK Longitudinal Linkage Collaboration (UK LLC) is the national Trusted Research Environment (TRE) for data linkage in longitudinal research, led by the Universities of Bristol and Edinburgh. It simplifies access to linked data for research in the public good, enabling discoveries through linked associations between health, social, behavioural, and economic research.
The data held in the TRE is provided by a wonderful collection of established UK Longitudinal Population Studies whose participants have been providing data on the basis they are used for research to deliver global benefits and impact.
UK LLC enhances the study-collected data by linking participants’ health and socio-economic data and data about the environments, neighbourhoods and dwellings in which participants live.
For participants
How UK LLC works for the public good
As a participant of one of the studies taking part in UK Longitudinal Linkage Collaboration, you have kindly shared data about yourself with your study to help improve health and wellbeing.
Read our promises to participantsFor researchers
UK LLC Explore: our data catalogue
UK based researchers can apply to access data held within the UK LLC Trusted Research Environment. Over 325,000 participant records from more than 20 established Longitudinal Population Studies are linked with health, non-health and place-based data.
View our data catalogueUK LLC Guidebook: our data documentation and TRE user guide
Whether you are a researcher interested in applying to access data, already working in the Trusted Research Environment, a Longitudinal Population Study data manager or an interested member of the public, our guide will direct you to find the information you need.
View GuidebookUK LLC Apply: our application system
Longitudinal researchers and analysts who use large datasets as part of their research and are interested in the depth of detail present in Longitudinal Population Study datasets can apply now.
Start an applicationA new era for a wide range of longitudinal health and wellbeing research
1st Jul 2025
Today, UK LLC announces new approvals from NHS providers and UK Government departments meaning linked longitudinal data held in the UK LLC Trusted Research Environment (TRE) can now be used…
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UK LLC protocol paper published in IJPDS
20th Feb 2025
The UK Longitudinal Linkage Collaboration (UK LLC) protocol paper is now published. You can read the full news summary or the full article in the International Journal of Population Data…
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PEDRI blog
7th Jan 2025
Read the latest guest blog from PEDRI where Kirsteen from UK Longitudinal Linkage Collaboration shares her perspectives on PEDRI’s recent roundtable on the role of public involvement in applications for…
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Office for National Statistics Accreditation
All applicants to our Trusted Research Environment must hold Office for National Statistics Accredited Researcher status or be enrolled on an Office for National Statistics Safe Researcher training course.
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Did you know…
We have ISO 27001 accreditation, a globally recognised gold standard in information security management.
Resource hub
A library of resources for our partner Longitudinal Population Studies
Did you know…there are a range of laws and legal principles involved in the use of data for research?
Find out moreMy journey to UK LLC’s Public Involvement Programme
1st Jul 2025
My name is Michael (he/him). In this blog I am going to talk about what I have done as a public contributor for UK Longitudinal Linkage Collaboration (UK LLC). I’ll…
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What you can expect from UK LLC when starting a project in their Trusted Research Environment
1st Jul 2025
In this blog, health data scientist and researcher Joseph Lam, shares his experience of working in the UK LLC Trusted Research Environment and the support received as a user. Joseph’s…
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