Yes, Spartacus there could be attendants in uniforms I think.
In one Ladies',abroad, I saw real powder puffs. (Boxes of loose face powder used to have very soft 'puffs' in the 'Power Room'.) There was a luxurious carpet too.
The relevance is that these really were little havens for women for privacy, peace and chat.
Some large department shops may still have a large mirrored room separated from actual lines of ladies' cubicles.
What about the London shops like Harrods, Dickens and Jones and so forth? Do they still have these? It might be worth writing go them in advance of them feeling they must give way to the pressure to make their 'Ladies' available to men. We could say please don't - please supply some safe gender neutral ones separately, for trans people to use safely, but keep the traditional womens' havens as they are.