This has come up on other threads and the thinking that it is going to be too difficult is more the consequence of the sucess of the TRAs in not only confusing sex with gender, but also asserting falsely that those who self identify cant be excluded.
What needs to happen is a total cultural change, or rather undoing the damage done by the aggressive TRA campaign to colonise not just women's spaces eg toilets but single sex provision ie women's support services.
This is going to hard to do because so many people and the media re-inforce the idea that women dont, or shouldn't mind, if they are forced to be with a biolocigal male in places where formally they would never have dared enter.
So the cultural change, or going back to what was / is the division of spaces, services and support based on biological sex is going to be hard to do.
It also means institutions need to be much clearer that toilets or whatever are provided on the basis of same sex.
And given how far down the road (and money spent) on creating "gender neutral" facilities many will be loathe to do it. (Gender neutral being one of those weasel word phrases meaning if you are kind and up to date you would feel forced to accept that that is how the world has "moved on".)
And more importantly institutions and providers need to be made aware that even under existing law they can apply the EA single sex exemptions.
Long before TRAs pushed their agenda, too many places, such as the NHS, under the guise of cost cutting, gave up the provision of single sex services.
Because underneath all of this is the misogynistic lack of respect for women. The MRAs have piggy backed on the TRA sucess, so too many women whether as users of providers feel unable to speak up for their / our rights.
We need groups in every region, town or city, acting as monitors to see that those providing services or facilities.
Only in (re)creating a social norm that biological males do not belong in women's spaces, services will it be easier to "enforce" ie because it will become abnormal for a man to be seen trying to enter a women's facility.
Not forgetting that if the wording of the EA is changed to make it clear that references to sex mean biological sex, this would be an additional basis on which to challenge.
And unfortunately we need the national media to take this up to help (re)create this as the norm
But as so many papers and news channels are completely Stonewalled and wanting to be kind, this is going to be hard.