So from looking at Twitter, it seems the Hayward Gallery have these
twitter.com/search?q=Hayward%20gallery&src=typed_query
Another poster reports possible change at Sadlers Wells, tbc
I was at the Wellcome and ground floor loos are now cubicles for all, then wash hands next to a bloke. There are still proper loos on another floor apparently, I just asked, I didn’t check.