Northern Ireland's Equality Commission has said it aims to publish new formal guidance in June after the Supreme Court's ruling that a woman is defined by biological sex. The court had been asked to decide on the proper interpretation of the 2010 Equality Act, which applies across Great Britain but not in Northern Ireland. The Equality Commission said it would "advise all employers and service providers, including councils, to review any policies that the Supreme Court judgment may impact on".

"As always, we advise them to come to us for advice relevant to their particular circumstances prior to making any changes," it added.