Institute of Epidemiology & Health Care


Using the ONS LS

ONS LS data is available for free to researchers who can show that their work is in the public interest. The confidentiality of the individuals in the ONS LS data sample is of paramount importance, however, so researchers must apply to use the data within the Five Safes Framework.

The Five Safes Framework

For safe use of secure data, including the ONS Longitudinal Study dataset, ONS’ Secure Research Service uses the Five Safes Framework. This is a set of principles adopted by a range of secure labs. These protocols provide complete assurance for data owners such as the ONS. The Five Safes are:

  • Safe people – trained and accredited researchers are trusted to use data appropriately.
  • Safe projects – data are only used for valuable, ethical research that delivers clear public benefits.
  • Safe settings – access to data is only possible using ONS’ secure technology systems.
  • Safe outputs – all research outputs are checked to ensure they cannot identify data subjects.
  • Safe data – researchers can only use data that have been de-identified.

See below for full guidance on how to access and use the ONS Longitudinal Study.


Thinking of using the ONS LS?

All you need to know to get started


Want to use the ONS LS for your research?

How to apply to use the data


Doing your ONS LS research

Find out what happens once your project has been approved


Disseminating your ONS LS research results

What to do when you wish to present or publish the results of your research

Celsius Resources


Sources of information and guidance

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