(I assume I would have heard if it had changed yet so,) more than one person providing sexual services from a single premises is still illegal. You can't get around it, it applies even if they're never both there at once, so what XW5 said. You have to find out where it's tolerated.
Even two workers each renting their own room in bedsit-style accommodation may be considered a brothel if they share facilities such as a bathroom.