| Honorific-Prefix: | His Excellency |
| Derek Leask | |
| Order: | 25th High Commissioner from New Zealand to the United Kingdom |
| Term Start: | March 2008 |
| Term End: | February 2013 |
| Predecessor: | Jonathan Hunt |
| Successor: | Alexander Lockwood Smith |
| Birth Place: | Wellington, New Zealand |
| Alma Mater: | Victoria University of Wellington, University of Canterbury |
Derek Leask (born 1948) is a New Zealand diplomat. From March 2008 to February 2013, he was the High Commissioner from New Zealand to the United Kingdom, and concurrently accredited as Ambassador to Ireland and High Commissioner to Nigeria. Leask is a career diplomat, who joined the Ministry of Foreign Affairs in 1969. Before becoming Commissioner, he was Deputy Secretary at the Ministry of Foreign Affairs and Trade in Wellington. He served as Ambassador to the European Union in Brussels from 1994 to 1999, and was earlier posted to Suva, Ottawa and London, between 1985 and 1989.[1]
Leask was born in Wellington, and has degrees from Victoria University of Wellington (BCA), and the University of Canterbury (MComm, Hons-Economics).[2]
Minister of Foreign Affairs Winston Peters announced Leask would be the next High Commissioner in London on 22 November 2007, succeeding Jonathan Hunt.[1] As High Commissioner, Leask attended the service for Edmund Hillary at St George's Chapel in Windsor Castle on 2 April 2008.[2]
Starting in 2012, Leask was connected to the leaking of documents from Ministry of Foreign Affairs and Trade. An inquiry led by Paula Rebstock was later found to be "flawed" in its dealings with Leask by an Ombudsman's report by Ron Paterson, which recommended Leask be paid legal costs and compensation.[3]