>> we've got the whole network here, really, from the managers of the brothel here to the people facilitating transport. we've got the buyers. we've got the traffickers from thailand as well, and somebody who sorted out the proceeds and moneylaundering as well. >> in order to secure convictions in britain for all of those involved in lilly's case, it's essential she positively identifies her traffickers. for her own safety, lilly is now in the witness protection program in thailand. but in an incredible act of bravery, she agrees to return to the uk to help identify and convict her traffickers. >> it's a big day. it's a big chunk of evidence, the identification evidence. >> so as not to be acued of influencing lilly, the officers can't be present at the identification session.