Annabelleh, the flats dont have to be shared by another girl at the same time. The fact that the accommodation has been used by another prossie deems it a brothel if another uses the same flat. It might not be quite as noticeable if it is not used daily by different girls but the law still deems it a brothel.
I applaud you for your forward thinking and trying to make a business out of this but you really must be FULLY aware of the law, warts and all. This is how so many females have come a cropper when they give up whoring themselves but try to stay in the industry by helping running working apartments.
I have never stated that I only have one flat to rent out and none of the flats I have advertised for have ever been shared with another escort, I work with some estate agents who are open to girls renting out empty flats which is why I advertised some rooms and flats, none of the flats I'm advertising will be shared by another girl at the same time as that is obviously against the law.