Updated guidance on single-sex public spaces came into force across most of the UK on Wednesday, despite opposition from trans-rights groups and many MPs.The Equality and Human Rights Commission’s new code of practice says people must use facilities such as toilets and changing rooms according to their biological sex. It was updated following the Supreme Court judgment last April, which ruled that the terms “man”, “woman” and “sex” under the 2010 Equality Act referred to biological sex, rather than gender identity.

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