Watch A United Kingdom (2016) HD Full Movie Free on SolarMovie. Watch A United Kingdom (2016) online free. The story of King Seretse Khama of Botswana and how his loving but controversial marriage to a Briti...The story of King Seretse Khama of Botswana and how his loving but controversial marriage to a British white woman, Ruth Williams, put his kingdom into political and diplomatic turmoil.