Boys 12/13 Yrs 100m Breaststroke - Heats (Declared Winners)
Full Results
| Place | Name | YoB | Club | | Time | | R.T. | FINA Pt | | 50 |
| 1. | Douglas Kelly | (03) | Scot West | | 1:09.93 | | + 0.69 | 502 | | 33.00 |
| 2. | Finley Jarvis | (03) | Dorset | | 1:12.24 | | + 0.73 | 456 | | 33.64 |
| 3. | Jamie Scutt | (03) | Sussex | | 1:13.18 | | + 0.75 | 438 | | 34.29 |
| 4. | Jamie Dark | (03) | Warwicks | | 1:14.77 | | + 0.63 | 411 | | 35.42 |
| 5. | Alex Rosser-Barnett | (03) | Shropshire | | 1:15.44 | | + 0.61 | 400 | | 35.49 |
| 6. | Jack Aldridge | (03) | Devon | | 1:15.78 | | + 0.96 | 395 | | 35.61 |
| 7. | Freddie Laws | (03) | Norfolk | | 1:15.84 | | + 0.70 | 394 | | 35.85 |
| 8. | Harvey Freeman | (04) | Northants | | 1:16.14 | | + 0.69 | 389 | | 35.73 |
| 9. | Jack Smith | (04) | Cumbria | | 1:16.50 | | + 0.78 | 384 | | 35.95 |
| 10. | Jaydon Wordley | (03) | Wiltshire | | 1:16.93 | | + 0.77 | 377 | | 36.33 |
| 11. | Bima Zulkarnaen | (04) | Staffs | | 1:20.83 | | + 0.96 | 325 | | 37.88 |
| 12. | William Robins | (03) | Bedfordshire | | 1:21.81 | | + 0.63 | 314 | | 38.44 |
| 13. | Jack Brown | (03) | Cambs | | 1:21.90 | | + 0.79 | 313 | | 38.35 |
| 14. | James Casewell | (03) | Worcs | | 1:21.94 | | + 0.68 | 312 | | 37.79 |
| 15. | Jago Mottart | (03) | Cornwall | | 1:25.91 | | + 0.79 | 271 | | 39.10 |
| | Matthew Broughton | (03) | Lincolnshire | | DQ | | | | | |
