The UK’s Supreme Court has ruled that “man”, “woman” and “sex” in the Equality Act 2010 refer to sex, not self-ID or paperwork (gender-recognition certificates). This agreed with our legal interpretation. We have published new guidance and are in the process of updating our publications to reflect the judgment. We are also working to provide answers to the questions we're hearing from supporters and the media. We will publish these as soon as possible.

Sex and the Office for National Statistics: a case study in policy capture

How did the ONS end up in court defending its guidance on a question which most people would deem self-explanatory? Alice Sullivan explains the legislative and political context around gender recognition, and the consequences for data collection.