| Bibno. | Participant | Category | Country | Distance |
|---|---|---|---|---|
| 103 | Ray Gordon | (M) Veteran40 |  | Triathlon |
| 43 | Rebecca Bates | - | | Triathlon |
| 141 | Rebecca Sammon | (F) Senior | | Triathlon |
| 30 | Reece Harrod | (M) Senior | | Triathlon |
| 152 | Richard Laybourne | (M) Senior | | Triathlon |
| 150 | Richard Miller | (M) Veteran50 | | Triathlon |
| 108 | Ricky Cowley | (M) Senior | | Triathlon |
| 72 | Rob Hannam | (M) Veteran40 | | Triathlon |
| 397 | Robert Burgess | (M) Veteran40 | | 10K |
| 134 | Robert James | (M) Veteran40 | | Triathlon |
| 201 | Robert Simpson-jones | (M) Senior | | 5K |
| 262 | Robert Streeter | (M) Veteran50 | | 5K |
| 45 | Roman Lagnado | (M) Senior | | Triathlon |
| 12 | Rosie Thorman | (F) Senior | | Triathlon |
| 314 | Roy Jennings | (M) Veteran40 | | 10K |
| 128 | Rui Santos | (M) Veteran40 | | Triathlon |
| 25 | Rupert Barth Von Wehrenalp | (M) Veteran40 | | Triathlon |
| 53 | Russell Jackson | (M) Senior | | Triathlon |
| 241 | Ruth Lee | (F) Veteran40 | | 5K |
| 382 | Ryan Crane | (M) Senior | | 10K |
| 79 | Ryan Jones | (M) Senior | | Triathlon |
| 427 | Sam Baly | (M) Senior | | 10K |
| 170 | Sam Bonner | (F) Senior | | Triathlon |
| 80 | Sam Forman | (M) Senior | | Triathlon |
| 423 | Sam Gooding | (M) Senior | | 10K |
| 175 | Sam Spinks | (M) Senior | | Triathlon |
| 428 | Samantha Carpenter | (F) Veteran40 | | 10K |
| 5 | Sarah Christie | (F) Senior | | Triathlon |
| 345 | Sarah Lawfull | (F) Veteran40 | | 10K |
| 362 | Sean Fitzpatrick | (M) Senior | | 10K |
| 160 | Seb Parrish | (M) Senior | | Triathlon |
| 24 | Sebastian Beierling | (M) Veteran40 | | Triathlon |
| 435 | Sharon Veness | (F) Veteran50 | | 10K |
| 315 | Shirley Reynolds | (F) Veteran50 | | 10K |
| 147 | Sho Araki | (M) Senior | | Triathlon |
| 327 | Sian Fletcher | (F) Senior | | 10K |
| 384 | Sian Thomas | (F) Senior | | 10K |
| 399 | Simon Cockram | (M) Senior | | 10K |
| 51 | Simon Coleman | (M) Senior | | Triathlon |
| 391 | Simon Dinsdale | (M) Veteran40 | | 10K |
| 417 | Simon Leuty | (M) Senior | | 10K |
| 337 | Sina Heidarzadeh | (M) Senior | | 10K |
| 358 | Sinead Hoyes | (F) Senior | | 10K |
| 379 | Sinead Varrie | (F) Veteran40 | | 10K |
| 252 | Sixtine Raffelsbauer | (F) U20 | | 5K |
| 39 | Sophie Bold | (F) Senior | | Triathlon |
| 86 | Sophie Everett | (F) Senior | | Triathlon |
| 203 | Sophie Giddings | (F) Senior | | 5K |
| 304 | Soumen Paul | (M) Senior | | 10K |
| 349 | Stephanie Wells | (F) Senior | | 10K |
