| Pos | Name | Age | Club | Time |
|---|---|---|---|---|
| 1 | Thomson, Kyle | 14 | Eastkilbride | 46.20 |
| 2 | O'Hare, Thomas | 12 | Eastkilbride | 46.29 |
| 3 | Bell, Logan | 12 | Swim-IT | 46.82 |
| 4 | Furniss, Ewan | 13 | Musselburgh | 48.22 |
| 5 | Donvito, Giulio | 12 | Dunedin ST | 48.27 |
| 6 | Stewart, Murray | 11 | Balfron Barr | 49.74 |
| 7 | Van Rietvelde, Rhys | 11 | Musselburgh | 50.85 |
| -- | Cassells, Nathan | 12 | Eastkilbride | X41.75 |