Something I forgot to say in my last post.....
the reality is that few trafficked women are touted through hotels nowadays anyway (at least in the UK).
The ones who are taken on tours around the country tend to use short term lets from AirBNB or (more often) Booking.com, while the longer term "popup" brothels tend to rent flats or houses for 3/4 months from dodgy rental agencies who don't ask for references - often run by immigrants.