There have been multiple investigations into sex-trafficking of women from eastern europe in the UK, and it is a big problem. As another user has already said, these women are brought into the UK often against their will or tricked into it by false presences of a legal job offer. Once they arrive, they are forced to work as a prostitute, prevented from contacting home, threatened with violence by their 'employers' and in many cases actually living in confinement.

I don't like the sound of this service one bit.