Nelson Mandela's "long walk to freedom" has now been translated into musical theatre. French production "Madiba" revisits the apartheid era through music and drama. Actor Jean-Louis Garçon tells us about the challenges of playing one of the 20th century's iconic figures. This new show has had the all-important green light from the late leader's family: Ndaba Mandela, Nelson Mandela's grandson, shares his memories of Madiba and tells us how his grandfather's legacy lives on in South Africa.