Linking Data for Future Research Discoveries

What is UK LLC?

The UK Longitudinal Linkage Collaboration is the national Trusted Research Environment 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.

For participants

How UK LLC works for the public good

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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 participant promises

For researchers

UK LLC Explore: our metadata 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 metadata catalogue

UK LLC Guidebook: our data documentation 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 where to find the information you need.

View our data documentation guide

UK 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 application

Latest from UK LLC

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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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New infographics aim to raise public awareness of their legal rights relating to Longitudinal Population Study data use

18th Nov 2024

UK LLC launches an infographic series to raise awareness among Longitudinal Population Study participants of some of the most important laws and legal principles involved in the use of their…

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Did you know…


UK LLC has ISO 27001 accreditation, a globally recognised gold standard in Information Security Management.

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Resource hub – coming soon!


A library of resources for UK LLC partner Longitudinal Population Studies

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Did you know…there are a range of laws and legal principles involved in the use of data for research?

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From the blog

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Bringing policies to life – a day with the UK LLC Citizen Panel

21st Mar 2025

In this blog, Katharine Evans, UK LLC Senior Data Manager, talks about taking part in the Citizen Panel workshop. Please also view our other blogs in this mini-series from Salma, Jonathan, Sarah, Farheen,…

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Building Trust: Navigating Data Access and Protection in Longitudinal Population Studies

10th Mar 2025

In this blog, UK LLC Citizen Panel member, Alan shares his thoughts on discussions at the recent Birmingham workshop. Please also view our other blogs in this mini-series from Salma,…

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