The ruling means that a transgender person with a certificate that recognizes them as female should not be considered a woman for equality purposes, but the court added that its ruling “does not remove protection from trans people” against discrimination.

UK Supreme Court rules that equalities law defines a woman as someone born biologically female; AP explains

The ruling means that a transgender person with a certificate that recognizes them as female should not be considered a woman for equality purposes, but the court added that its ruling “does not remove protection from trans people” against discrimination.