The United Kingdom’s Supreme Court has ruled that the legal definition of “woman” under the Equality Act 2010 refers specifically to biological sex, effectively excluding trans women from this classification in key areas of the law.
In a unanimous judgment, the court held that the terms “woman” and “sex” in the Equality Act refer to biological women, sparking celebration among gender-critical campaigners and deep concern among trans rights advocates.
The case, brought by campaign group For Women Scotland, challenged Scottish government guidance that included trans women with Gender Recognition Certificates (GRCs) under the legal definition of women.
The group argued this interpretation could erode the rights of biological women in single-sex spaces such as changing rooms, hostels, and women-only shortlists.
Outside the court, Susan Smith and Marion Calder of For Women Scotland hailed the decision as a significant victory. Campaigners waved placards and cheered as the ruling was delivered.
Delivering the verdict, Lord Patrick Hodge stated:
“The terms ‘woman’ and ‘sex’ in the Equality Act 2010 refer to a biological woman and biological sex. Provisions related to sex discrimination can only be interpreted through that lens.”
He further explained that interpreting “sex” to mean “certificated sex” would conflict with other definitions within the law and risk creating inconsistencies, particularly in contexts like pregnancy protections and maternity leave. The ruling clarified that trans women can still be protected from discrimination on the grounds of “gender reassignment” under the Equality Act.
The UK’s Labour government welcomed the ruling, describing it as offering “clarity and confidence” for service providers. Meanwhile, the opposition Conservatives called it “a clear victory for common sense” and urged the government to revise guidance to reflect the judgment.
