Having spoken to a few in the know re the law and how they would go about prosecuting a punter, its clear the law is unworkable in that area as the burden of proof is so high that its almost impossible to secure a conviction. Catching an agricultural worker living in poor conditions and being trafficked and exploited is easier and is to be applauded.
Mind you if they wanted to catch a punter it was piss easy last week in the city centre as there was a dude standing outside one block with a bottle of wine in his hand and shouting down the phone "I'm outside now, what number is it"