Seretse and Ruth at London Film Premiere. Seretse Khama, chief-designate of the Bamangwato tribe of Africa, who is in five year exile, went with his English wife Ruth, to the premiere of a new Belgian film at the Continental Cinema in Tottenham Court Road, London, this evening. Picture shows : Seretse Khama and his wife arriving at the Continental cinema for the showing of the film 'Without Pity' 10 September 1950