A BBC team has spent months getting under the bonnet of a rapidly growing migrant route. Almost overnight Vietnam has become the largest single source of migrants making the dangerous channel crossing to reach the UK. Speaking to one man who has been involved in the criminal network for decades, we uncover a world of forged documents, premium services and shattered dreams.

Lucy Hockings speaks to the BBC’s Paris Correspondent, Andrew Harding and our reporter in Bangkok, Thu Bui.

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Producers: Richard Moran and Mariana Hernández Carrillo

Sound engineer: Michael Regaard

Assistant editor: Sergi Forcada Freixas

Senior news editor: Sara Wadeson