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 gender in legislation: the case against “legal sex change”

Understanding GRA2004 as making a “legal sex change” is erroneous and overstates the effect of a gender recognition certificate. “Legal sex” has been misconceptualised. Whilst clarification of the law is desirable, qualifying “sex” in legislation in any way is unnecessary, has undesirable consequences and carries significant risk throughout domestic legislation, as well as to sex-based rights under international law.