William Manley has 3 recorded races from GB.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2025-04-13 | Schneider Electric Marathon de Paris 2025 — Schneider Electric Marathon de Paris | Marathon | 3:30:35 | 9513 |
| TCS London Marathon 2026 | Marathon | 4:38:06 | 33126 | |
| TCS London Marathon 2025 | Marathon | 5:19:56 | 41682 |