EVENT 401 Boys 11/13 Yrs 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Bailey Slater | 12 | Nova Cent'n | 5:08.40 |
| 4 | 2 | Max Davies | 12 | Nova Cent'n | 5:08.18 |
| 5 | 3 | Max Shaw | 12 | Northampton | 5:06.70 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 2 | 4 | Matthew Jackson | 12 | Nova Cent'n | 5:05.63 |
| 3 | 5 | Sean McCann | 12 | Co Leicester | 5:00.90 |
| 4 | 6 | Thomas Currie | 13 | Northampton | 4:58.40 |
| 5 | 7 | Angus McCallion | 13 | Nova Cent'n | 4:55.60 |
| 6 | 8 | Younis Peach | 13 | Northampton | 4:54.70 |
| 7 | 9 | Callum Kettlewell | 13 | Retford | 4:54.40 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 10 | Finley Bunhejee | 12 | Nova Cent'n | 4:53.60 |
| 2 | 11 | Daniel Parkes | 13 | Derventio | 4:52.82 |
| 3 | 12 | Samual Nicholls | 13 | Chesterfield | 4:52.74 |
| 4 | 13 | Connor Byron | 12 | Nova Cent'n | 4:52.60 |
| 5 | 14 | Daniel Kennedy | 13 | Co Leicester | 4:51.08 |
| 6 | 15 | Joseph Vickers | 12 | Boston | 4:49.96 |
| 7 | 16 | Alex Keeble | 13 | Leic Sharks | 4:49.28 |
| 8 | 17 | Matthew Woodhall | 13 | Nova Cent'n | 4:46.00 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 19 | Razvan Grumazescu | 13 | Northampton | 4:44.70 |
| 2 | 21 | Rico Bringeman | 12 | Boston | 4:44.16 |
| 3 | 23 | Charlie Kaletha | 13 | Braunstone | 4:39.35 |
| 4 | 25 | Jacob Whittle | 13 | Derventio | 4:22.40 |
| 5 | 24 | Nathan Allen | 13 | Co Leicester | 4:39.11 |
| 6 | 22 | Dawid Sroka | 13 | Nova Cent'n | 4:44.16 |
| 7 | 20 | Liam Dawson | 12 | Derventio | 4:44.30 |
| 8 | 18 | Austin Johns | 13 | Co Leicester | 4:45.40 |