Seretse Khama was born in 1921 in Bechuanaland when it was still a British Protectorate. In 1966 he became Botswana's first president. In between he married a white Londoner, Ruth Williamson, was exiled by the British, and made to renounce his interest in succeeding as head of the Bangwato. It's an extraordinary and notable life, and he's been nominated by Professor Mike Bode, an astrophysicist and visiting professor to Botswana.

As well as archive of Seretse Khama, the programme includes contributions from Bishop Trevor Mwamba and Susan Williams, author of Colour Bar: The Triumph of Seretse Khama and His Nation.

The producer for BBC Studios Audio in Bristol is Miles Warde