We did. I'm still not clearer on what you think is ok and what isn't, though.
You wrote:
As far as I know - IANAL - there would seem to be nothing to stop people setting up any groups they like,
the EA2010 does exactly the job of stopping people setting up any groups they like..
...what they will not be able to do is use the Equality Act to lawfully exclude anyone who wanted to join whether they fitted the brief or not.
If they can't lawfully exclude anyone they want then it's not "a group they like". It can't be a group of their choosing if they're not allowed to exclude the people they want.
So you could have a women's and TiMs group - let's be honest, in that case it would just be another transactivist political group - but they would be very unlikely to be able to legally exclude any other men if those men chose to push it.
Right, that's the point. If they can't legally exclude any other men then it ceases to be a women's and TiMs group.
You would be reliant I'd think on whether someone wanted to push it legally for that particular group.
And really, why bother? If transactivists want transactivists groups, go for it.
I disagree. It's very important to enforce that there are no "women's + trans-identifying men" groups. Not a single one, and not ever. Not even if every woman and girl wants there to be one. Because each such group discriminates unlawfully against the other men. Unlawful discrimination doesn't become lawful just because everyone votes in favour of it.
To put the point another way: We must start from the position that separating men from women is a Bad Thing (tm) and to be tolerated only in exceptional circumstances. This stems from a time when women were historically excluded from all sorts of men-only opportunities and places. But one way discrimination against one sex of the other becomes OK is a single-sex association. That's not a defect in the law (as AR seems to think) - it's a feature.