EVENT 104 Boys 12 Yrs/Over 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Finley McKeown | 12 | Ilkeston | |
| 2 | 3 | Oliver Burton | 12 | BelperMarlin | 2:11.42 |
| 3 | 5 | Elliott Claxton | 12 | BelperMarlin | 2:06.62 |
| 4 | 7 | Ben Simpkins | 12 | Repton | 2:02.76 |
| 5 | 6 | Austin Bishop | 12 | Chesterfield | 2:06.49 |
| 6 | 4 | Preston-Jace Darkins | 12 | Ilkeston | 2:08.44 |
| 7 | 2 | Jack Barrett | 12 | BelperMarlin | 2:12.85 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 9 | Ethan Foord | 14 | Ilkeston | 1:53.75 |
| 2 | 11 | Benjamin Trueman | 12 | Lichfield | 1:51.15 |
| 3 | 13 | Aden Van Hoorebeek | 12 | Chesterfield | 1:49.03 |
| 4 | 15 | Samuel Cooper | 14 | Long Eaton | 1:45.82 |
| 5 | 14 | Tristan Dean | 14 | Derby Excel | 1:48.20 |
| 6 | 12 | Douglas Meakin | 13 | Long Eaton | 1:50.06 |
| 7 | 10 | Oscar Williscroft | 13 | Long Eaton | 1:51.90 |
| 8 | 8 | Alex Wilson | 12 | Ashbourne | 1:54.36 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Kai Hughes | 14 | Long Eaton | 1:43.34 |
| 2 | 19 | Reuben Canetti | 12 | Chesterfield | 1:43.23 |
| 3 | 21 | Noah Lodge | 12 | Eckington | 1:42.82 |
| 4 | 23 | Owen Richards-Jones | 12 | Ashbourne | 1:39.37 |
| 5 | 22 | Toby Kirkham | 12 | Bakewell SC | 1:42.24 |
| 6 | 20 | Dylan Taylor | 12 | Long Eaton | 1:43.11 |
| 7 | 18 | James Stevens | 14 | Ilkeston | 1:43.30 |
| 8 | 16 | Archie Barrett | 12 | BelperMarlin | 1:44.00 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 25 | Daniel Foster | 12 | Derby Excel | 1:38.41 |
| 2 | 27 | Finley Jenkins | 13 | BelperMarlin | 1:36.14 |
| 3 | 29 | Elliot Bestwick | 22 | Ilkeston | 1:35.05 |
| 4 | 31 | Isaac Ebanks | 13 | Derby Excel | 1:33.98 |
| 5 | 30 | Rory McKeown | 14 | Ilkeston | 1:34.30 |
| 6 | 28 | Joel Vickers-Wright | 13 | Chesterfield | 1:35.63 |
| 7 | 26 | Harry Taylor | 12 | Long Eaton | 1:36.63 |
| 8 | 24 | Archie Wilson | 14 | BelperMarlin | 1:38.75 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 33 | Jacob Smyth | 15 | Eckington | 1:30.00 |
| 2 | 35 | Lucas Kimber | 14 | Derby Excel | 1:27.30 |
| 3 | 37 | Benjamin Cami | 15 | Long Eaton | 1:26.74 |
| 4 | 39 | Zach Lambert | 13 | Derby Excel | 1:25.90 |
| 5 | 38 | Torsten Ellis | 18 | DerbyPhoenix | 1:26.04 |
| 6 | 36 | Toby Drayson | 12 | BelperMarlin | 1:27.00 |
| 7 | 34 | Benjamin Taylor | 14 | Long Eaton | 1:27.34 |
| 8 | 32 | Ayrton Porter | 12 | Repton | 1:33.90 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 41 | Joseph Maskrey | 15 | BelperMarlin | 1:24.98 |
| 2 | 43 | Ollie Tranmer | 14 | Eckington | 1:23.09 |
| 3 | 45 | Cole Burke | 13 | BelperMarlin | 1:21.90 |
| 4 | 47 | Zachary Drayson | 14 | BelperMarlin | 1:13.70 |
| 5 | 46 | Alfie Lynch | 15 | DerbyPhoenix | 1:17.81 |
| 6 | 44 | George Cotton | 12 | Derby Excel | 1:22.30 |
| 7 | 42 | Evan Johnson | 14 | BelperMarlin | 1:24.90 |
| 8 | 40 | Joshua Day | 14 | Eckington | 1:24.99 |