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Tony May was only weeks old when he was abandoned as a baby on the Victoria Embankment in London in 1942. There was no clue to who he was or why he was left by the river Thames in the middle of World War Two. Raised by loving adopted parents who named him, Tony has never been able to discover the identity of his birth parents. Now in his 70s, Tony may finally be able to solve the mystery thanks to advances in DNA testing and painstaking detective work by genealogist Julia Bell. But this type of search is also not without its risks as there is no telling what secrets may be uncovered.

Will Tony be happy with the answers he finds? The popularity of home DNA testing has exploded in recent years as people around the world rush to find out more about their family history. Global test kit sales are predicted to hit 100 million by 2021, and as more people add to these huge online databases it is easier than ever to unearth information about the past. And we may not be prepared for the surprises and family secrets that await us.

Presenter: Claire Bates