Toilets and other services come under Part 3 of the Equality Act and associations are dealt with under Part 7 of the Act.
Basically, associations are not allowed to discriminate against a person by eg refusing to accept them as a member. However, there is a specific carve out in Schedule 16 that allows associations to be restricted to people who share a protected characteristic.
I remember that Akua Reindorf tweeted about this shortly after FWS.
She put it like this:
The exemption in Schedule 16 can only be relied on if all members share the protected characteristic (eg all women or all men etc).
It is possible for an association to combine protected characteristics (“PCs”) as long as it’s for people who all have the same two (or more) PCs: lesbian women, retired men, young Asian disabled people etc. This way, everybody in the club falls within both/all the PCs.
But it cannot be an “either/or” association of two distinct groups: disabled people + older people; Asian women + European men; young people + disabled people etc. This is because the association cannot satisfy the single protected characteristic condition for any one of its PCs.
So it is not permissible to have an association for women + men with the protected characteristic of gender reassignment (which is what “transgender women” are for the purposes of the EA2010).
This wouldn’t be an association for women because some members are men and it wouldn’t be an association for trans people because some members aren’t trans. In consequence an association like that cannot rely on the Schedule 16 exemption.
https://x.com/akuareindorf/status/1916748422658359573