Where to find the information you need

Last modified: 02 Dec 2025

Sources for information for researchers, Longitudinal Population Study (LPS) participants and staff, and the public.

UK LLC Guidebook is aimed primarily at researchers to help them understand the data available and how to work in the UK LLC Trusted Research Environment (TRE).

The table below suggests places to find information, depending on whether you’re a researcher, LPS data manager, LPS participant or other member of the public.

User group	Suggested journey
Researchers interested in applying to UK LLC	1. UK LLC Guidebook – take a look at Understanding UK LLC to see if UK LLC is the resource best suited to your research. Check Can I apply? to make sure you and your project are eligible. See contributing LPS and their permitted linkages to understand the breadth of data available. Look at the TRE user guide to understand what it’s like working in the TRE. 2. UK LLC website – look at the Data Use Register to see all approved projects. 3. UK LLC Explore – browse our metadata catalogue and start to build a data request. 4. UK LLC Apply – submit your expression of interest via UK LLC’s online application management system.
Researchers working on an approved UK LLC project	1. UK LLC Guidebook – go to UK LLC sample to understand the sample that underpins the datasets at the point in time you were granted access to them. Look through the TRE user guide to understand all aspects of working in the TRE. Read the individual dataset guides to learn more about the datasets. Browse the FAQs to help you troubleshoot. 2. UK LLC Apply – submit an amendment to your project, e.g. to apply for an extension to your time in the TRE.
LPS data managers	1. UK LLC Guidebook – take a look at contributing LPS, your individual LPS page and dataset pages. See permitted linkages to understand which datasets your participants are linked to. Go to UK LLC sample to see how many of your participants are included in UK LLC, how many have successfully linked and how this has changed over time. 2. UK LLC Explore – browse our metadata catalogue. 3. UK LLC Apply – if you would like to access your LPS’ linked records, submit your expression of interest via UK LLC’s online application system.
LPS participants and members of the public	1. UK LLC website – read general information about UK LLC, including a list of LPS that contribute data, our privacy notice, and our values. UK LLC’s Data Use Register shows the research projects approved by UK LLC. 2. UK LLC Explore – browse our metadata catalogue to discover the full breadth of data available in the TRE.

If there are any aspects to our documentation that you feel could be better explained, or would benefit from more detail, please email the UK LLC Data Team support@ukllc.ac.uk. We very much welcome feedback.