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Centre for Longitudinal Study Information and User Support
UCL RESEARCH DEPARTMENT OF EPIDEMIOLOGY AND PUBLIC HEALTH

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Welcome to CeLSIUS

We enable research using the Office for National Statistics (ONS) Longitudinal Study - the largest longitudinal data resource in England and Wales

Longitudinal studies follow the lives of individuals over a long period of time, showing us how people are affected by changes in society. The ONS Longitudinal Study contains the census data and some life events data of approximately one million sample members, collected over 40 years. This service is free to the user.

About the ONS Longitudinal Study

About the ONS Longitudinal Study

Find out more about the study

Using the ONS Longitudinal Study

Using the ONS Longitudinal Study

Find out how to access and use the data

Data dictionary

Data dictionary

Look up the variables in the study

Resources

Resources

Information and guidance to help you use the data

Research

Research

Current and past LS projects and the outputs resulting from this research

About CeLSIUS

About CeLSIUS

Meet the team

Latest news

New CeLSIUS Research Brief: Windrush migrants in the LS (PDF)

CeLSIUS estimate that in 2011 there were around 1,735 Windrush children who had entered the country prior to 1971 - find out more about how the ONS LS can be used to estimate the number of Windrush migrants in ways which go beyond the methods based solely on the most recent census, or on the Labour Force Survey.

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July 2018

CeLSIUS is currently operating at a reduced service level due to new staff training: please be aware that there usually will only be one trained user support officer per day available in the ONS office from now until the autumn this year. We must therefore ask for your patience during this time as  work will inevitably be slower during this period.

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