We talk about procuring, because there has to be a victim. WIth regard to child prostitution consent is no longer an acceptable defence. Currently with regard to adult prostitution, the legislation remains in force and the defence centres on the issue of consent. In some cases, the victims will refuse to betray their pimp. I could make an analogy with domestic violence. In some cases, these women display behaviour typical of victims because they remain attached to the person exploiting them.
So all that individual needs to do, despite all the evidence gathered during an investigation, is to have the woman testify that she is an adult and entitled to do what she wants with her body and that she is a consenting adult. The individual will never be convicted.