Alastair Jackson has 6 recorded races from GB.
| Date | Race | Distance | Time | Overall |
|---|---|---|---|---|
| 2026-04-12 | Schneider Electric Marathon de Paris 2026 — Marathon de Paris | Marathon | 4:56:07 | 47762 |
| TCS London Marathon 2026 | Marathon | 3:53:25 | 17525 | |
| TCS London Marathon 2026 | Marathon | 5:09:03 | 42466 | |
| BMW Berlin Marathon 2025 | Marathon | 3:59:03 | 13244 | |
| TCS London Marathon 2024 | Marathon | 3:52:02 | 17474 |