Information about gender identity has not previously been collected in the census, except in relation to sex being male or female. Following feedback from the 2021 Census topic consultation, we committed to taking forward work on exploring whether and how to collect information on gender identity and published our outline Gender identity research and testing plan.

An overview of the work being conducted in relation to gender identity is provided on the ONS gender identity pages. Findings from our research can be found in the 2021 Census topic research report.

Further question development work is being carried out before our recommendations inform a government White Paper in 2018.