Simon Davies has 5 recorded races from GB.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2025-04-13 | Schneider Electric Marathon de Paris 2025 — Schneider Electric Marathon de Paris | Marathon | 4:49:13 | 44570 |
| TCS London Marathon 2026 | Marathon | 4:21:37 | 27450 | |
| TCS London Marathon 2025 | Marathon | 3:11:08 | 4648 | |
| TCS London Marathon 2024 | Marathon | 3:00:13 | 3681 | |
| TCS London Marathon 2023 | Marathon | 3:02:57 | 3363 |