EVENT 207 Boys 12 Yrs/Over 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 2 | Kamran Parekh | 13 | DerbyPhoenix | |
| 2 | 4 | Oliver Burton | 12 | BelperMarlin | 1:50.85 |
| 3 | 6 | Reuben Canetti | 12 | Chesterfield | 1:46.31 |
| 4 | 8 | Finley Jenkins | 13 | BelperMarlin | 1:37.92 |
| 5 | 7 | Noah Lodge | 12 | Eckington | 1:43.30 |
| 6 | 5 | Dillan Mistry | 12 | Long Eaton | 1:48.90 |
| 7 | 3 | Archie Barrett | 12 | BelperMarlin | 2:11.57 |
| 8 | 1 | Finley McKeown | 12 | Ilkeston | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 10 | Samuel Cooper | 14 | Long Eaton | 1:33.96 |
| 2 | 12 | Archie Wilson | 14 | BelperMarlin | 1:32.25 |
| 3 | 14 | Alexander Thompson | 12 | Derby Excel | 1:30.90 |
| 4 | 16 | Elliot Bestwick | 22 | Ilkeston | 1:24.90 |
| 5 | 15 | Rory McKeown | 14 | Ilkeston | 1:29.43 |
| 6 | 13 | Michael Yuill | 13 | Lichfield | 1:31.40 |
| 7 | 11 | Isaac Ebanks | 13 | Derby Excel | 1:32.56 |
| 8 | 9 | Ayrton Porter | 12 | Repton | 1:35.50 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Samuel Shakespeare | 15 | BelperMarlin | 1:20.00 |
| 2 | 20 | Cole Burke | 13 | BelperMarlin | 1:14.80 |
| 3 | 22 | Jack Harris | 14 | Derby Excel | 1:10.32 |
| 4 | 24 | Jacob Pemberton | 14 | BelperMarlin | 1:08.00 |
| 5 | 23 | Harry Maskrey | 16 | BelperMarlin | 1:08.50 |
| 6 | 21 | Lucas Kimber | 14 | Derby Excel | 1:11.40 |
| 7 | 19 | Elliott Penney | 17 | Eckington | 1:15.00 |
| 8 | 17 | Arlo Hems Gillson | 12 | Repton | 1:20.60 |