Keir Mather

Keir Mather
Official portrait, 2024
Parliamentary Under-Secretary of State for Aviation, Maritime and Decarbonisation
Assumed office
8 September 2025
Prime MinisterKeir Starmer
Preceded byMike Kane
Assistant Government Whip
In office
10 July 2024 – 7 September 2025
Prime MinisterKeir Starmer
Opposition Whip
In office
26 March 2024 – 30 May 2024
LeaderKeir Starmer
Member of Parliament
for Selby
Selby and Ainsty (2023–2024)
Assumed office
20 July 2023
Preceded byNigel Adams
Majority10,195 (20.7%)
Personal details
BornKeir Alexander Mather
(1998-01-29) 29 January 1998
PartyLabour
Education
Signature
Websitewww.keirmather.org
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Keir Alexander Mather (/kɪər ˈmðər/; born 29 January 1998) is a British Labour politician who has been Member of Parliament (MP) for Selby, formerly Selby and Ainsty, since 2023. He has served as a Parliamentary Under-Secretary of State for Transport since September 2025, making him the youngest minister since William Ewart Gladstone in 1834.