We have slavery in the UK too, the migrants are smuggled in by criminal gangs from europe or where ever they can get them from and they're forced to work in backstreet sweatshops, me thinks prostitution will be involved as well.
The poor bastards don't have a bleeding chance of a decent life, the police and our government knows it's happening but they do **** all to stop it, if the authorities happen to discover a building housing these sweatshop migrants then the newspapers give them grief for a few days and then it disappears into the night again.
I would say it's happening all over europe, no country is free of this scourge.