| Bibno. | Participant | Category | Country | Distance |
|---|---|---|---|---|
| Ken Orledge | 45-49 |  | Calfman Triathlon Relay | |
| Kerry Ann Wilson | 55-59 | | Cowman Triathlon | |
| Kevin Gerrard | 50-54 | | Cowman Triathlon | |
| Kevin Pope | 40-44 | | Calfman Triathlon (World Qualifier) | |
| Kevin Sadler | 60-64 | | Calfman Triathlon (World Qualifier) | |
| Khadija Hussain | 25-29 | | Stampede Triathlon Relay | |
| Kristina Kiss | 30-34 | | Calfman Triathlon (World Qualifier) | |
| Krystyna Sykes | 50-54 | | Stampede Triathlon Relay | |
| Laura Colston | 40-44 | | Stampede Triathlon | |
| Laura Lever | 35-39 | | Stampede Triathlon | |
| Laura Van Hoof | 35-39 | | Cowman Triathlon Relay | |
| Lauren Hoar | 35-39 | | Calfman Triathlon Relay | |
| Lauren Maw | 30-34 | | Calfman Triathlon (World Qualifier) | |
| Laurence Edmunds | 25-29 | | Calfman Triathlon Relay | |
| Lawrie Procter | 60-64 | | Cowman Aquabike | |
| Leah Burke | 35-39 | | Calfman Triathlon (World Qualifier) | |
| Lee Shipp | 45-49 | | Calfman Triathlon (World Qualifier) | |
| Leighton Howard | 50-54 | | Calfman Triathlon (World Qualifier) | |
| Lewis Tompkins | 35-39 | | Stampede Triathlon | |
| Liam Mulkerrins | 40-44 | | Cowman Triathlon | |
| Lily Caunt | 30-34 | | Calfman Triathlon (World Qualifier) | |
| Linda Clarkson | 75-79 | | Calfman Triathlon (World Qualifier) | |
| Lisa Phipps | 45-49 | | Calfman Triathlon (World Qualifier) | |
| Liz Dunlop | 65-69 | | Calfman Triathlon (World Qualifier) | |
| Liz Hayes | 55-59 | | Cowman Triathlon Relay | |
| Liz Woolmington | 55-59 | | Calfman Triathlon (World Qualifier) | |
| Lorna Clarke | 45-49 | | Calfman Triathlon (World Qualifier) | |
| Lorraine Masterton | 55-59 | | Calfman Aquabike | |
| Louis Harrington-Smith | 40-44 | | Stampede Triathlon | |
| Luciano Merolla | 45-49 | | Cowman Triathlon | |
| Lucy Hyland | 30-34 | | Stampede Triathlon | |
| Lucy Turner | 25-29 | | Calfman Triathlon Relay | |
| Ludovic Moulard | 50-54 | | Cowman Triathlon | |
| Luke James | 35-39 | | Stampede Triathlon | |
| Luke Watts | 50-54 | | Calfman Triathlon (World Qualifier) | |
| Luke Wilkins | 30-34 | | Cowman Triathlon Relay | |
| Lupe Morera | 40-44 | | Calfman Triathlon (World Qualifier) | |
| Magda Skrzymowska | 20-24 | | Cowman Triathlon | |
| Marcin Wolny | 40-44 | | Calfman Triathlon (World Qualifier) | |
| Marcus Sherborne | 50-54 | | Calfman Triathlon (World Qualifier) | |
| Mark Allen | 45-49 | | Cowman Triathlon | |
| Mark Gill | 50-54 | | Stampede Triathlon | |
| Mark Lacy | 50-54 | | Cowman Triathlon | |
| Mark Milsom | 60-64 | | Cowman Aquabike | |
| Mark Pattrick | 25-29 | | Calfman Triathlon (World Qualifier) | |
| Mark Pocock | 50-54 | | Calfman Triathlon (World Qualifier) | |
| Mark Richardson | 50-54 | | Calfman Triathlon (World Qualifier) | |
| Mark Ryan | 50-54 | | Calfman Triathlon (World Qualifier) | |
| Mark Yeoman | 50-54 | | Calfman Aquabike | |
| Marta Kolbuk | 35-39 | | Calfman Triathlon (World Qualifier) |
