@Redlake
This EHRC guidance does not clarify the law. In fact it contravenes the law.
The fact is that if anyone is excluded they can bring a claim for unlawful discrimination, and demand to see their evidential base for their decision. It cannot be a generalized set of evidence but must be specific to the person they are excluding.
Nope.
We exclude all men, every man. Always. Our case analysis was, as per the law, our provision and the needs of our clients. We decided that we could not accommodate men within our provision, for many reasons included in the previous guidance notes, and, as our provision has not changed, our client base, numbers, have not decreased, that's it. Our case analysis is done.
It does not, and never has meant person by person. It has always meant by situation.
So M+S can decide that it's single sex provision can include gender identities and M&Co can decide that theirs do not. If they both have their own reasons they are both entitled, in law, to make those policies. And their customers have every right to complain, object, boycott, as they see fit.
Your interpretation is the same as that of RMW, Stonewall etc. And they are, and have always been, wrong. That's the point of this clarification. To correct those misunderstandings.