I think you will find that the Equality Act 2010 prohibits discrimination against people with the protected characteristic of gender reassignment in the provision of separate and single-sex services but includes an exception that service providers can use in exceptional circumstances.
Key word being exceptional. So women's refuge where vulnerable women can be reasonably argued; likewise open changing facilities.
This is incorrect. Neither the Equality Act nor the Explanatory Notes use the word exceptional or demand exceptional circumstances in reference to applying the sex-based exemptions.
The phrase exceptional circumstances is used only once in the entire text of the law, and that is in Schedule 3, Part 2 Education, Section 7 (c).
The word exceptional is used two more times in the Act, in relation to admission policies in school and further and higher education.
The Explanatory Notes, which courts can draw on to discern government intent in interpreting a law, again use the word exceptional only in relation to admission policies at school and in further and higher education.
This wording was merely the EHRC's own interpretation of the Act. It cannot therefore be the key word in relation to the sex-based exemptions.
It's super complex for anyone wishing to challenge someone - quite a minefield.....
There are a number of clear cut, and well defined circumstances where sex discrimination against a member of the opposite sex is lawful. The Equality Act itself does not make this at all complex. In practice, it is difficult only because from the beginning the sex-based exemptions contained in the Equality Act were misinterpreted by the very body set up to enforce compliance with its provisions.
Also, the protected characteristic of gender reassignment does not convey the right to use single-sex provisions, regardless of whether a person has legally changed sex or not. Just as having the protected characteristic of religion does not allow a person to demand access to provisions made specifically for those with the protected characteristic of disability. Or for someone with the protected characteristic of sexuality to demand access to provisions made for women who have the protected characteristic of pregnancy and maternity.
Each protected characteristic allows separate provisions to be made for the benefit of the protected group that mean anyone who does not share that protected characteristic can be lawfully excluded.