The U.K. Supreme Court's decision adds to the mounting rollback of protections for trans people across the globe.

The Supreme Court justices emphasised that transgender people already have protections against discrimination and harassment written into the Equality Act. The arguments in court centred on whether trans women with gender recognition certificates (GRC) should be treated as women by the Equality Act.

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