During WWII, the sailors of the British merchant navy played a vital role in keeping the UK fed and armed. They carried essential supplies across the treacherous Atlantic - and many paid with their lives. What's less well known is that many of those sailors were Chinese - volunteers who came to Britain to help the war effort and settled predominantly in the port city of Liverpool. But after the war, many of those Chinese sailors who returned home suddenly disappeared without a trace. For years families believed they'd decided to abandon them, but the reality was far worse.

Dr Lucienne Loh, from the University of Liverpool, has been uncovering what happened to those sailors who endured war for Britain and how Britain turned its back on them. In previously secret Government documents, she discovered a shocking truth...

Produced by Mariana Des Forges and edited by Dougal Patmore.

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