The Supreme Court of the United Kingdom ruled Wednesday that trans women are not legally women under the British Equality Act.

The United Kingdom’s highest court on Wednesday announced that transgender women do not fit the legal definition of “woman” that’s laid out in a major nondiscrimination law. Judges unanimously agreed that the term “woman” in the Equality Act of 2010 refers to biological women and that the term “sex” refers to biological sex.

The UK's highest court ruled that the definition of a woman referred to "biological sex", but it said trans people would not be disadvantaged by its landmark decision.