| Honorific-Prefix: | His Excellency |
| Office: | Her Majesty's Ambassador to Spain |
| Term Start: | October 2013 |
| Term End: | August 2019 |
| Predecessor: | Giles Paxman |
| Successor: | Hugh Elliott |
| Primeminister: | David Cameron Theresa May Boris Johnson |
| Birth Date: | 18 September 1967 |
| Birth Place: | United Kingdom |
| Children: | 3 |
| Alma Mater: | Magdalen College, Oxford Yale University |
| Birthname: | Simon John Manley |
| Nationality: | British |
Simon John Manley CMG (born 18 September 1967) is a British diplomat, now the UK Permanent Representative to the WTO and UN in Geneva and previously Ambassador to Spain from October 2013 to August 2019.[1]
Manley was educated at Montpelier Primary School, Latymer Upper School, Magdalen College Oxford and Yale University.[2]
Manley joined the Foreign & Commonwealth Office (FCO) in 1990. Before his posting to Madrid, he served as Director Europe at the FCO (2011-2013), responsible for policy toward the EU. He has been posted to the UK's Mission to the United Nations in New York City (1993-1998), where he worked on Yugoslavia and UN reform, and has twice been seconded to the European Union: to the European Commission (2003) and to the Council of the EU (1998-2002).
In March 2020 Manley was appointed Director-General for COVID-19 at the Foreign & Commonwealth Office, leading and coordinating HMG's coronavirus rollout.[3]
In June 2023 the World Trade Organisation's Trade and Gender Informal Working Group published its 2023-2024 plan. Manley and Clara Manuela da Luz Delgado Jesus were new, joining El Salvador's Ana Patricia Benedetti Zelaya, as co-chairs of the Working Group. They replaced Athaliah Lesiba Molokomme and Einar Gunnarsson.[4]