Important update
This update applies to users without access via a device on the University of Essex network.
Thank you for visiting WICID.
The service is currently offline for maintenance. You can still access and request the census flow data you need in the interim using the following options.
Data requests via the UK Data Service helpdesk
If you require specific flow data tables, please contact us via our helpdesk. To find out what flow data are available please consult the UK Data Service data catalogue. If you require help identifying the right table for your needs, please include any relevant details in your request, such as the census year, flow type, and geographies required.
When requesting safeguarded data, please ensure that you have registered with the Service with your institutional email address and have provided this in your helpdesk request.
Public 2011 and 2021 flow data tables
The public flow data tables from the 2011 and 2021 census are also available to download via the Office for National Statistics (ONS) Nomis service.
Last updated 30 October 2026