Boys 16/UN 100m Butterfly - Heats (Declared Winners)
Full Results
| Place | Name | YoB | Club | | Time | | R.T. | | | 50 |
| 1. | Santos VILLALON | (01) | Millfield | | 56.87 | | | | | 27.57 |
| 2. | Sam DAILLEY | (01) | Plymouth Lea | | 56.96 | | | | | 26.42 |
| 3. | Harrison BROWN | (01) | Stockport Mo | | 1:00.69 | | | | | 29.18 |
| 4. | Ben ROWETT | (01) | Guildford Ct | | 1:00.89 | | | | | 28.92 |
| 5. | Thomas CLARE | (01) | teamipswich | | 1:01.04 | | | | | 28.86 |
| 6. | Ben CHOO-YIN | (02) | Co Cardiff | | 1:01.33 | | | | | 28.50 |
| 7. | Timur GULYIYEN | (01) | Wycombe Dist | | 1:01.72 | | | | | 28.96 |
| 8. | Maximillian BOLCATO | (02) | Co Oxford | | 1:03.25 | | | | | 29.34 |
| 9. | Jensen HULBERT | (01) | Co Derby | | 1:05.71 | | | | | 30.96 |
| 10. | Josh PRESS | (03) | Co Milton K | | 1:08.04 | | | | | 31.67 |
