EVENT 137 Boys 10/14 Yrs 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Jack Adsetts | 11 | Chesterfield | 6:48.83 |
| 3 | 3 | James Lee | 11 | Co Derby | 6:13.98 |
| 4 | 5 | Ayrton Porter | 12 | Repton | 6:12.46 |
| 5 | 4 | Leo Hawkins | 12 | BelperMarlin | 6:03.12 |
| 6 | 2 | Cody Bassett | 12 | Buxton | 6:12.59 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 7 | Fraser Pyefinch | 11 | Long Eaton | 5:53.83 |
| 1 | 9 | Hector Cox | 11 | Repton | 5:50.45 |
| 2 | 11 | Harvie Wright | 13 | Swadlincote | 5:49.40 |
| 3 | 13 | Reuben Doherty | 13 | Ilkeston | 5:43.26 |
| 4 | 15 | Toby Drayson | 12 | BelperMarlin | 5:29.15 |
| 5 | 14 | Ryan Bullock | 14 | Long Eaton | 5:37.53 |
| 6 | 12 | William Moore | 12 | Co Derby | 5:37.41 |
| 7 | 10 | Tyler Shaw | 12 | Co Derby | 5:52.56 |
| 8 | 8 | Thomas Adams | 13 | Dronfield | 5:50.86 |
| 9 | 6 | Thomas Pope | 12 | Long Eaton | 5:55.52 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 17 | Oliver Smith | 11 | Repton | 5:21.50 |
| 1 | 19 | Hayden Hudson | 13 | Chesterfield | 5:12.14 |
| 2 | 21 | Flynn Chidlow | 13 | Ripley | 5:10.14 |
| 3 | 23 | Henry Jones | 14 | Eckington | 5:05.15 |
| 4 | 25 | Calin Tomozei | 14 | Chesterfield | 5:06.39 |
| 5 | 24 | Oliver Hadfield | 14 | Chesterfield | 5:11.52 |
| 6 | 22 | Thomas Townsend | 14 | Repton | 4:56.35 |
| 7 | 20 | George Cotton | 13 | Co Derby | 5:13.79 |
| 8 | 18 | Isaac Ebanks | 13 | Co Derby | 5:25.17 |
| 9 | 16 | Ted Pyefinch | 14 | Long Eaton | 5:33.59 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 27 | Seth Hems Gillson | 13 | Repton | 4:51.65 |
| 1 | 29 | Joe Helps | 14 | Repton | 4:51.62 |
| 2 | 31 | Zachary Drayson | 14 | BelperMarlin | 4:50.40 |
| 3 | 33 | Eden Saint | 13 | BelperMarlin | 4:44.43 |
| 4 | 35 | Reuben Hubinger | 14 | Repton | 4:34.12 |
| 5 | 34 | Alex Bates | 13 | Chesterfield | 4:46.52 |
| 6 | 32 | Liam Lyons | 14 | BelperMarlin | 4:47.21 |
| 7 | 30 | Jacob Pemberton | 14 | Ripley | 4:47.04 |
| 8 | 28 | Lucas Kimber | 14 | Ripley | 4:58.22 |
| 9 | 26 | Finlay Bird | 13 | Long Eaton | 4:50.49 |