UK Supreme Court rules legal definition of ‘woman’ based on biological sex
By Maryam Ahmad
In a landmark decision, the UK Supreme Court has ruled that the terms “woman” and “sex” in the Equality Act 2010 refer exclusively to biological sex, thereby excluding transgender women from the legal definition of “woman” under this legislation.
The unanimous ruling stems from a legal challenge by the feminist group For Women Scotland against a 2018 Scottish law that included transgender women in quotas for women’s representation on public boards. The Court determined that such inclusion would render the Equality Act incoherent, as it would create two sub-groups within those who share the protected characteristic of gender reassignment.
Supporters of the ruling, including author J.K. Rowling, hailed it as a victory for women’s rights and legal clarity. Conversely, LGBTQ+ advocacy groups such as Stonewall expressed deep concern, warning that the decision could lead to increased exclusion of transgender individuals from essential services and spaces.
While the ruling clarifies the legal definition of “woman” under the Equality Act, it does not diminish existing protections against discrimination for transgender individuals based on gender reassignment. The practical implications of this decision will depend on future implementation and interpretation by institutions and policymakers.

