The UK’s largest Pride organisers have suspended political party participation in their events in “unequivocal solidarity” with the transgender community.

In a joint statement, the organisers of Pride events in Birmingham, Brighton, London and Manchester said the move was a “direct call for accountability and a refusal to platform those who have not protected our rights” after the UK supreme court ruling last month.

The highest court in the UK ruled that the terms “woman” and “sex” in the Equality Act 2010 refer only to a biological woman and to biological sex. Five judges ruled unanimously that the legal definition of a woman in the act did not include transgender women who hold gender recognition certificates.