Boys 13/UN100m Butterfly - Heats (Declared Winners)
Full Results
| Place | Name | AaD | Club | | Time | | R.T. | FINA Pt | | 50 |
| 1. | Luke Hollingsworth | 14 | Amersham | | 1:03.60 | | + 0.79 | 480 | | 30.24 |
| 2. | William Klinkenburg | 14 | TauntonDeane | | 1:05.44 | | + 0.72 | 441 | | 30.01 |
| 3. | Edward Lee | 14 | Plymouth Lea | | 1:05.51 | | + 0.71 | 439 | | 30.70 |
| 4. | Eddisson Munoz | 14 | Co Leeds | | 1:07.28 | | + 0.69 | 406 | | 30.60 |
| 5. | Ryan Warriner | 13 | Co Liverpool | | 1:07.41 | | + 0.80 | 403 | | 32.05 |
| 6. | Matthew Price | 13 | Boldmere | | 1:07.60 | | + 0.74 | 400 | | 31.23 |
| 7. | James Stacey | 13 | Guildford Ct | | 1:09.44 | | + 0.76 | 369 | | 31.80 |
| 8. | Joshua Lawson | 14 | Millfield | | 1:09.81 | | + 0.74 | 363 | | 31.90 |
| 9. | Jack To | 13 | Co Sheffield | | 1:10.87 | | + 0.65 | 347 | | 32.91 |
| 10. | Luke Turley | 13 | Hatfield | | 1:12.87 | | + 0.88 | 319 | | 34.52 |
