Nigel Clive Cosby Trench, 7th Baron Ashtown, KCMG (27 October 1916 – 6 March 2010) was a British peer and diplomat.
After rising to the rank of Major in the King's Royal Rifle Corps during the Second World War, Trench spent some thirty years in the British foreign service, with postings which included Tokyo and Washington, D.C., before serving as British Ambassador to the Republic of Korea (1969–71) and then to Portugal (1974–76).
Trench was appointed a Commander of the Order of St. Michael and St. George in the 1966 Birthday Honours.
[3] He married Marcelle Catherine Clotterbooke Patijn van Kloetinge in 1939, with whom he had one son, Roderick Trench, 8th Baron Ashtown.
Lord Ashtown then married Dorothea Mary Elizabeth Minchin (d. 20 December 2019), former wife of Hans Heinrich XVII, 4th Prince of Pless, in 1997.