As part of our British black history coverage we look back at the racism faced by London's first black policeman from his own colleagues. We also hear about the death in police custody of black ex-soldier Christopher Alder. Plus, the intriguing story of a Somali sailor based in the UK in the early 20th century; the heartbreak faced by the children of black American soldiers and white British mothers during World War Two; and the story of Clyde Best, Britain's pioneering black footballer. Presenter Max Pearson also hears from Dr Martin Glynn of Birmingham City University's Black Studies course. Photo: London's first black policeman PC Norwell Roberts beginning his training with colleagues at Hendon Police College, London, 5 April 1967. Credit: Hulton Archive/Getty Images

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