Boys 13/UN100m Butterfly - Heats (Declared Winners)
Full Results
| Place | Name | YoB | Club | | Time | | R.T. | | | 50 |
| 1. | Danny Savage | (00) | Northampton | | 1:03.58 | | + 0.80 | | | 29.69 |
| 2. | Ben Hooper | (00) | Ealing | | 1:05.11 | | + 0.89 | | | 30.69 |
| 3. | Jack TO | (00) | Co Sheffield | | 1:05.42 | | + 0.76 | | | 31.44 |
| 4. | Santos Villalon | (01) | Millfield | | 1:06.75 | | + 0.76 | | | 30.75 |
| 5. | Ewan SMITH | (00) | Woking | | 1:07.72 | | + 0.79 | | | 30.49 |
| 6. | Hector PARDOE | (01) | Ellesmere Co | | 1:09.02 | | + 1.05 | | | 32.38 |
| 6. | Harry EADE | (00) | teamipswich | | 1:09.02 | | + 0.85 | | | 31.96 |
| 8. | Andrew Flanigan | (00) | Co Cardiff | | 1:09.55 | | + 0.78 | | | 32.46 |
| 9. | Mason Angove | (01) | TauntonDeane | | 1:13.36 | | + 0.67 | | | 33.45 |
| 10. | Jack Dolly | (02) | Co Coventry | | 1:15.40 | | + 0.78 | | | 34.97 |
