EVENT 401 Boys 11/13 Yrs 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 3 | 1 | Toby Love | 12 | Nova Cent'n | 5:15.58 |
| 4 | 2 | Cormac Maher | 12 | Falcon Nttm | 5:26.55 |
| 5 | 3 | Nicholas Skinner | 12 | Derventio | 5:15.36 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 4 | Kyran Cubitt | 11 | Nova Cent'n | 5:16.79 |
| 2 | 5 | Declan Luff | 12 | Leic Sharks | 5:14.10 |
| 3 | 6 | Sebastian Lee | 12 | Co Derby | 5:12.54 |
| 4 | 7 | Thomas Bruce | 12 | Boston | 5:12.38 |
| 5 | 8 | Samuel Cooke | 12 | Corby | 5:05.30 |
| 6 | 9 | Sam Potts | 12 | Nova Cent'n | 5:05.52 |
| 7 | 10 | Zak Frisby | 11 | Radford | DQ: 4.4 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 11 | Oliver Oxley | 12 | Co Leicester | 5:19.40 |
| 2 | 12 | Kallum Quirke | 12 | Nova Cent'n | 5:02.78 |
| 3 | 13 | Lewes Shorthose | 12 | Nova Cent'n | 5:02.13 |
| 4 | 14 | George Whittle | 12 | Derventio | 5:06.18 |
| 5 | 15 | Malachy Watt | 12 | Derventio | 5:06.49 |
| 6 | 16 | Sammy Rahimzadeh | 13 | Nova Cent'n | 4:59.11 |
| 7 | 17 | Finley Ellis | 13 | NottmLeander | 4:56.59 |
| 8 | 18 | Cillan McGuinness | 13 | Bassetlaw SS | 4:57.94 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 19 | Matthew Jackson | 13 | Nova Cent'n | 4:58.71 |
| 2 | 20 | Patrick Welsh | 13 | Derventio | 5:00.49 |
| 3 | 21 | William Poyser | 13 | Leic Sharks | 5:02.31 |
| 4 | 22 | Thomas Dixon | 13 | Braunstone | 4:56.74 |
| 5 | 23 | Elliot Sibley | 13 | Nova Cent'n | 5:05.53 |
| 6 | 24 | Bailey Slater | 13 | Nova Cent'n | 5:00.32 |
| 7 | 25 | Adam Read | 13 | Nova Cent'n | 5:05.97 |
| 8 | 26 | Max Davies | 13 | Nova Cent'n | 4:51.59 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 28 | Max Shaw | 13 | Northampton | 4:55.25 |
| 2 | 30 | Connor Byron | 13 | Nova Cent'n | 4:39.65 |
| 3 | 32 | Rico Bringeman | 13 | Boston | 4:37.83 |
| 4 | 34 | Liam Dawson | 13 | Nova Cent'n | 4:31.31 |
| 5 | 33 | Maitiu Clarke | 12 | Co Lincoln P | 4:41.47 |
| 6 | 31 | Connor Thorpe | 13 | Derventio | 4:42.40 |
| 7 | 29 | Sean McCann | 13 | Co Leicester | 4:48.48 |
| 8 | 27 | Ashley Lucas | 13 | Northampton | 4:47.95 |