Below is a full list of every UK Muay Thai and Kickboxing fighter to have fought in ONE Championship. Some have only fought on the ONE Friday Fights events at Lumpinee Stadium which started in January 2023.
Note: UK Muay Thai fighters are defined by the nationality they represented on the official ONE Championship website. UK-based fighters who represented their home country are not included. E.g Alex Bublea (Romania), Panicos Yusuf (Cyprus) and Sevket Cerkez (Turkey).
| Name | Debut | Event | Opponent |
|---|---|---|---|
| Andrew Miller | November 9, 2018 | ONE: Heart of a Lion | Alaverdi Ramazanov |
| George Mann | November 9, 2018 | ONE: Heart of a Lion | Jo Nattawut |
| Liam Harrison | December 7, 2018 | ONE: Destiny of Champions | Petchmorakot Petchyindee |
| Jonathan Haggerty | January 19, 2019 | ONE: Eternal Glory | Joseph Lasiri |
| Charlie Peters | February 16, 2019 | ONE: Clash of Legends | Chamuakthong FighterMuayThai |
| Liam Nolan | March 8, 2019 | ONE: Reign of Valor | Enriko Kehl |
| Juan Cervantes | September 6, 2019 | ONE: Immortal Triumph | Santino Verbeek |
| Amber Kitchen | September 6, 2019 | ONE: Immortal Triumph | Viktoria Lipianska |
| Michael Pham | September 6, 2019 | ONE: Immortal Triumph | Mohamad Fakri Bin Yusoff |
| Chris Shaw | January 31, 2020 | ONE: Fire & Fury | Rodlek PK Saenchai |
| Andy Howson | February 7, 2020 | ONE: Warriors Code | Josh Tonna |
| Iman Barlow | March 11, 2022 | ONE: Lights Out | Daniela Lopez |
| Jacob Smith | May 20, 2022 | ONE 157 | Rodtang Jitmuangnon |
| Josh Hill | January 20, 2023 | ONE Friday Fights 1 | Keivan Soleimani |
| Judy Humber | February 10, 2023 | ONE Friday Fights 4 | Malena Garcia |
| Hannah Brady | February 17, 2023 | ONE Friday Fights 5 | Claire Rankine |
| Claire Rankine | February 17, 2023 | ONE Friday Fights 5 | Hannah Brady |
| Iony Lawrence | February 17, 2023 | ONE Friday Fights 5 | Ploymuangjan SmileMuayThai |
| Lisa Brierley | March 3, 2023 | ONE Friday Fights 7 | Rungnapa Por Muangpetch |
| Nico Carrillo | April 21, 2023 | ONE Friday Fights 13 | Furkan Karabag |
| Dani Fall | May 19, 2023 | ONE Friday Fights 17 | Celest Hansen |
| Nathan Bendon | June 23, 2023 | ONE Friday Fights 22 | Seksan or Kwanmuang |
| Stephen Irvine | June 30, 2023 | ONE Friday Fights 23 | Pettong Kiatsongrit |
| George Jarvis | September 29, 2023 | ONE Friday Fights 35 | Chanajon PK Saenchai |
| Ellis Barboza | December 8, 2023 | ONE Fight Night 17 | Thongpoon PK Saenchai |
| Freddie Haggerty | January 26, 2024 | ONE Friday Fights 49 | Dankalong Sor Dechapan |
| George Mouzakitis | March 8, 2024 | ONE Friday Fights 54 | Ferzan Cicek |
| Gregor Thom | May 17, 2024 | ONE Friday Fights 63 | Taku Kondo |
| Otis Waghorn | June 14, 2024 | ONE Friday Fight 67 | Kongklai Sor Sommai |
| Alfie Ponting | August 2, 2024 | ONE Friday Fights 73 | Sonrak Fairtex |
| Amy Pirnie | August 3, 2024 | ONE Fight Night 24 | Yu Yau Pui |
| Joe Welch | December 6, 2024 | ONE Friday Fights 90 | Meeka Michael |
| Rudy Da Silva | December 6, 2024 | ONE Friday Fights 90 | Kaisei Sato |
| Ubaid Hussain | December 6, 2024 | ONE Friday Fights 90 | Petsinchai |
| Marie McManamon | March 8, 2025 | ONE Fight Night 29 | Allycia Rodrigues |
| Lyndon Knowles | April 5, 2025 | ONE Fight Night 30 | Roman Kryklia |
| Jacob Thompson | May 23, 2025 | ONE Friday Fights 109 | Apiwat Sor Somnuk |
| Donny Smith | June 20, 2025 | ONE Friday Fights 113 | Maciej Karpinski |
| Logan Chan | August 1, 2025 | ONE Friday Fights 118 | Chama Superbon TC |
| Erik Luis | October 3, 2025 | ONE Friday Fights 127 | Mammad Amraliyev |
| Fergus Smith | October 17, 2025 | ONE Friday Fights 129 | Zahran Al-Wesabi |
| Alfie Lynch | October 24, 2025 | ONE Friday Fights 130 | Shoma Okumura |