EVENT 104 Boys 12/13 Yrs 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Leo Solly | 13 | Cornwall | 1:33.34 |
| 2 | 3 | Rocco Wilson | 12 | Cumbria | 1:26.67 |
| 3 | 5 | Thomas Johnson | 13 | Gloucs | 1:21.51 |
| 4 | 7 | Finlay Underwood | 13 | Northants | 1:20.40 |
| 5 | 6 | George Souter | 13 | Sussex | 1:20.79 |
| 6 | 4 | Charlie Owen | 13 | Wiltshire | 1:24.17 |
| 7 | 2 | Harry Stovin | 13 | Shropshire | 1:28.23 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 9 | Thomas Bidgood | 13 | Cheshire | 1:18.66 |
| 1 | 11 | Daniel De Filippo | 13 | Bedfordshire | 1:17.27 |
| 2 | 13 | Harry Meakin | 12 | Staffs | 1:16.47 |
| 3 | 15 | Jaden Leo | 13 | Derbyshire | 1:15.81 |
| 4 | 17 | Wilfred Leigh | 13 | Dorset | 1:13.82 |
| 5 | 16 | Lazaros Giarenis | 13 | Norfolk | 1:15.43 |
| 6 | 14 | Jenson Pickett | 13 | Warwicks | 1:16.46 |
| 7 | 12 | Max Walters | 13 | SE Herts | 1:16.90 |
| 8 | 10 | Zach Hopkinson | 13 | Lincolnshire | 1:17.37 |
| 9 | 8 | Lucas Lovell | 13 | Hampshire | 1:19.05 |