Ngô Đình Nhu
Diệm appointed Luyện as ambassador to the United Kingdom. Diệm and another brother, Ngô Đình Nhu, were executed on 2 November 1963 during a military coup. Another brother, Ngô Đình Cẩn, was captured a few days later and eventually sentenced to death and executed. Luyện was able to escape assassination because he was in London at the time.