Simon Lambert has 4 recorded races from GB.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2026-04-12 | Schneider Electric Marathon de Paris 2026 — Marathon de Paris | Marathon | 4:46:28 | 44899 |
| TCS London Marathon 2024 | Marathon | 2:49:28 | 1702 | |
| TCS London Marathon 2023 | Marathon | 2:49:10 | 1378 | |
| TCS London Marathon 2022 | Marathon | 2:50:54 | 911 |