Thomas Northwood has 4 recorded races from GB.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2025-04-13 | Schneider Electric Marathon de Paris 2025 — Schneider Electric Marathon de Paris | Marathon | 3:08:58 | 3290 |
| TCS London Marathon 2026 | Marathon | 3:45:34 | 14693 | |
| Tokyo Marathon 2026 | Marathon | 3:13:37 | 3865 |