EVENT 401 Boy 10 Yrs/Over 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Ollie Taylor | 11 | Co Leicester | 7:18.65 |
| 4 | 3 | Frank Bacon | 11 | Co Leicester | 6:24.65 |
| 5 | 2 | Ryan Hejraty | 11 | Co Leicester | 6:41.65 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 5 | Harry Lucas | 11 | Co Leicester | 6:00.35 |
| 3 | 7 | Oliver Davies | 12 | Leic Peng | 5:25.45 |
| 4 | 9 | William Oxley | 11 | Co Leicester | 5:15.89 |
| 5 | 8 | Matthew Longman | 14 | Loughborough | 5:20.00 |
| 6 | 6 | Ashton Simmonds | 11 | Co Leicester | 5:47.58 |
| 7 | 4 | James Yates | 12 | Co Leicester | 6:05.13 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Harrison Bywater | 14 | Leic Peng | 5:06.29 |
| 2 | 13 | Ethan Ford | 14 | Co Leicester | 4:54.74 |
| 3 | 15 | Jacob Milward | 14 | Radford | 4:47.93 |
| 4 | 17 | Matthew Dizon | 14 | Co Leicester | 4:43.81 |
| 5 | 16 | James Berry | 14 | Radford | 4:44.08 |
| 6 | 14 | Lewis Fitch | 14 | Co Leicester | 4:50.24 |
| 7 | 12 | Oliwier Pacholec | 15 | Loughborough | 5:00.53 |
| 8 | 10 | William Lacey | 13 | Co Leicester | 5:15.28 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 19 | Finn Reed | 14 | Loughborough | 4:42.50 |
| 2 | 21 | Findlay Cordle | 14 | Repton Swim | 4:36.00 |
| 3 | 23 | Archie Neaves | 16 | Ellesmere Co | 4:18.09 |
| 4 | 25 | Thomas Dixon | 16 | Leic Sharks | 4:11.13 |
| 5 | 24 | Matthew Shipley | 19 | Kimberley | 4:15.00 |
| 6 | 22 | George Moore | 15 | Co Leicester | 4:18.51 |
| 7 | 20 | Daniel Harris | 14 | Co Leicester | 4:36.40 |
| 8 | 18 | Jack Goldfinch | 15 | Loughborough | 4:43.56 |