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.
Ba's lived here for nearly a year. He was placed with his foster parents after being found wandering, confused and scared, around a train station in the North of England, with just the clothes he was wearing. "You feel safe now though, don't you?" his foster mum asks, needing affirmation that the mental and physical scars Ba wears will heal with enough care.
His story is one both extraordinary, and typical of the growing number of Vietnamese men and women recognised as being potential victims of trafficking in the UK. For several years, Vietnamese have been one of the top three nationalities featured in modern slavery cases referred to the National Crime Agency, with 702 cases in 2018.
The Salvation Army, which supports all adult victims of modern slavery in the UK, says the number of Vietnamese nationals referred to them over the last five years has more than doubled. It's estimated 18,000 people make the journey from Vietnam to Europe each year.
Ba believes it was a Chinese gang that trafficked him to the UK. He was kidnapped off the streets of Ho Chi Minh City, where he was a street child, an orphan who slept in the bend of a sewage pipe. He sold lottery tickets for money, although older men sometimes beat him and grabbed his takings.
A 2017 Unicef report described Ho Chi Minh City as "a source location, place of transition and destination of child trafficking". And a 2018 report by anti-trafficking charities said numerous trafficked Vietnamese children had reported being abducted while living on the streets.
That's what happened to Ba. "An older man told me that if I came with him, he could help me earn a lot of money. But when I said no, he put a bag over my head. I couldn't believe what was happening," he says. He was then bundled into a small van, bound as well as blindfolded, his shouts stifled.
Somewhere along the way, Ba's captors changed, and now he couldn't understand the language they spoke. When they finally came to a standstill and the bag was removed, Ba found himself in a large, empty, windowless warehouse in China, and was told to wait. "I knew they were preparing to send me somewhere to work," he says.
During the months that Ba was held there, a guard regularly beat him. "I don't know why," Ba says with a shrug, "there was no reason." When he was caught trying to escape, his punishment was far worse than kicks and punches - the guard poured scalding water over his chest and arms.
"It was agony. I was shouting at him to stop but he didn't listen," he says. Ba became unconscious with the pain. "I just lay still for days. I couldn't walk. It was painful for a very long time."
His foster mum adds that his scarred skin is tight all over his body, and a permanent reminder of what happened to him.
"How did I keep going? I kept telling myself to keep eating, keep working and to wait for the opportunity to run away," he says.
He finally escaped by smashing an upstairs window, and jumping to the ground. Then he ran for as long as he could!