Sex Matters, which campaigns for women-only single-sex spaces, had argued that the City of London’s approach compromised privacy and safety, particularly for women. He said the policy should be changed in light of last year’s Supreme Court ruling, which clarified that legal sex refers to biological sex at birth. Sex Matters said it was disappointed with the ruling and was considering its legal options. Maya Forstater, chief executive of Sex Matters, said: "The fight for women’s safety, privacy and dignity in single-sex spaces will continue. She argued that the City of London’s refusal to defend its policy in court placed an unfair burden on individuals.