Herbert Smith, the ‘Handcuff King’, and his girlfriend, Lottie Roberts, are circus performers who secretly buy and sell babies for profit in Edwardian Britain. But they’ll need more than a disappearing act to fight the families who come after them.

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Presenter: Rima Ahmed Reporter: Richard Tisdale Produced by Luke de Costa Researcher: Bethan Davies Social Media: Fede Marilotti Online Producer: Lee Macaulay Executive Producer: Luke Eldridge Commissioning Editors: Gareth Hydes and Alistair Miskin