 A brief return to London as Under-Secretary of State at the (newly merged) Foreign and Commonwealth Office in 1969 was followed by the role of Ambassador and Deputy Permanent United Kingdom Representative to the United Nations.Warner married for the first time in New York City in 1971, Simone Georgina de Ferranti (Née Nangle), who gave him a stepdaughter and two sons of his own, one of whom is TV chef Valentine Warner.At the end of that year he was named as Ambassador to Japan and learned Japanese at the University of Sheffield.