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Historian David Olusoga explores the enduring relationship between Britain and people whose origins lie in Africa. From the African Romans who guarded Hadrian's Wall in the 3rd century AD to the black trumpeter of the Tudor courts, David uncovers a history that is as surprising as it is revealing.

In the second part of his four-part series, historian David Olusoga explores the business of slavery and remembers the black sailors who fought for Britain at Trafalgar. He also celebrates a Georgian boxing superstar and the men and women who crossed continents in pursuit of freedom.

In part three of this groundbreaking series, historian David Olusoga explores the Victorian moral crusade against slavery.

Historian David Olusoga concludes his series by exploring the events which helped shape black British identity in the 20th century.