Nigel Clive Cosby Trench, 7th Baron Ashtown, KCMG (27 October 1916 – 6 March 2010) was a British peer and diplomat.
Trench was born in St Albans,[1] the son of Clive Newcome Trench and Kathleen Maud Marion McIvor. He was educated at Eton and Corpus Christi College, Cambridge.
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).
In 1990, after his retirement, he inherited the Irish peerage of Baron Ashtown from his cousin Christopher Trench, 6th Baron Ashtown.