National Crime Agency (NCA) officers arrested Feng Xu as part of a major investigation into modern slavery and human trafficking and found evidence that Xu had used multiple false identities to source hundreds of different properties for several criminal networks.
31 different false or fraudulent Chinese or Portuguese passports were recovered, along with numerous ID documents and one computer database held by Xu listed 446 different addresses which he had been involved in renting.
The properties would then be set up as brothels where women would be exploited. Others were turned into cannabis farms.