Centre for Longitudinal Study User Information and Support

Welcome to CeLSIUS, the Centre for Longitudinal Study Information and User Support. We are an ESRC-funded support team for UK academic, statutory and voluntary sector users of the Office for National Statistics (ONS) Longitudinal Study (LS).

On 1st August 2012 the CeLSIUS service and most of the CeLSIUS team moved to University College London (UCL). The team at UCL will provide the service until 31st July 2017.

The continued aim is to provide high quality user support for the ONS LS in a timely fashion. This service is free to the user.


The 2011 Census data has been linked in to the LS and the new dataset is now available to researchers.

A provisional, revised, Data Dictionary is available for download in zipped form; you will need Microsoft Access software to use it.

Researchers wishing to use 2011 Census data in an active LS project:

You will need to complete a new Customer Request Form but the content can be very similar to your previous application – just add indications of the purpose and extent of your use of 2011 Census data. You do not need to re-apply for Approved Researcher status for this project.

All other researchers:

You are advised to read the How to use the LS and the Step by Step Guide sections of this website which will guide you through the application procedure.

Page last modified on 24 apr 14 11:42 by Joanne Tomlinson