It was a horrifying death for the 39 Vietnamese nationals found in the back of a trailer in an industrial park in Essex, in October last year. The story shone a light on the subterranean world of people smuggling and human trafficking, reports Cat McShane, specifically the thriving route between Vietnam and the UK.

Ba is slight for 18. His body shrinks into a neat package as he recalls his experiences. We're sitting in a brightly lit kitchen, a Jack Russell dog darting between us under the table. Ba's foster mum fusses in the background, making lunch and occasionally interjecting to clarify or add some detail to his account of his journey here from Vietnam. She wants to make sure his story is understood.

Read more at BBC News.