On the whole, not bad. Quite confused by the thing about you don't require a GRC, and you can't be questioned about it either. Gives carte blanche for any bloke to walk straight on into women's spaces and women will be afraid to question it.
BUT, good working examples of what legitimate aims look like, and that's it's not on a case by case basis, and indeed, women's services, groups and spaces, can exclude.
So Women's Aid, for example, is a good example of this. They've consulted, confirmed that they are committed to single sex spaces but also happy to signpost other services and provide support as well. Didn't stop the tantrums, but that's to be expected.
It also hasn't stopped the latest line of tantrumming, and declarations from individuals that they'll straight up ignore the guidance and do what they want. But hopefully it will give organisations a bit of backbone not to back down, and that as long as you are fair, it's ok to say no to the demands of males, even if they whine at you.