Just read the comments on then Indy article and a few things drew my attentionto me. I will put them here if Ok as I have an ilness that means I wont be able to do it tomorrow. Perhaps if useful someone will pick it up and or ignore as appropriate!!
One poster on the comments (a transwoman I understand) referred to there being a penalty for false declaration of self ID of up to 2 years in prison for perjury: Its one of those things that gets trotted out as supossed reasurance. but it got me thinking, that on what basis exactly could someone be accused of not having transitioned and how would it be proved that they had not? Iam googling but yet to find the answers. So by gender stereotypes one presumes and I would like to know exaclty how it could/ would be enforced or assessed, as like with the EA stuff, it is of no use if it cannot be enforced.
Also, there is mis-information going around saying that the EA only allows sex segragation in a few exceptional circumstances and elsewhere there is a blanket right to female spaces - it doesn't. It allows single sex spaces anywhere where an argument can be made that sex segregation is a proportionate means of acheiveing a legtimate aim.
And I believe 'case by case' means situation by situation, not necessarily person by person.
Anyway, also my huge thaks to all you great women fighting for all of this. 
i will carry on googling for an answer to the false delcaration stuff.