Police have been accused by a senior MP of "cosying up" to "pimping websites" that she claims allow trafficked women to be "raped multiple times a day".
Dame Diana Johnson said it was "disgraceful" that police forces and the National Crime Agency (NCA) were engaging with businesses such as Vivastreet.
Struggling crimefighting chiefs were today unable to tell a cross-party committee of MPs whether any prosecutions had stemmed from working alongside such sites to gather intelligence of traffickers.
