EVENT 505 Men 15 Yrs/Over 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 1 | Kian Saville | 23 | S10 | Daventry | 6:40.00 |
| 1 | 3 | Owen Johnson | 15 | S10 | Repton | 5:07.05 |
| 2 | 5 | Kai Gelsthorpe | 17 | S10 | Derby Excel | 4:53.00 |
| 3 | 7 | Finlay Stephenson | 15 | | Co Leicester | 4:51.10 |
| 4 | 9 | Jacob Briers | 15 | | Deepings | 4:47.30 |
| 5 | 8 | Evan Noorpuri | 16 | | Lincoln Vulc | 4:47.70 |
| 6 | 6 | William Taylor | 15 | | Louth | 4:52.10 |
| 7 | 4 | Cole Johnson | 15 | | Radford | 4:53.10 |
| 8 | 2 | Max Davies | 16 | S9 | Worksop | 5:10.10 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 11 | Jensen Hylton | 15 | | Co Lincoln P | 4:42.40 |
| 1 | 13 | Tyler Hollyman | 16 | | Wellingboro | 4:40.90 |
| 2 | 15 | Joseph Laurie | 15 | | Nova Cent'n | 4:37.31 |
| 3 | 17 | Dylan Jamieson | 15 | | Repton | 4:34.98 |
| 4 | 19 | Layne Keyworth | 15 | | Bassetlaw SS | 4:34.10 |
| 5 | 18 | Sam Macer | 15 | | Repton | 4:34.39 |
| 6 | 16 | Jamie Love | 15 | | Nova Cent'n | 4:37.00 |
| 7 | 14 | Ryan Norton | 16 | | Boston | 4:40.00 |
| 8 | 12 | David Bucur | 15 | | Worksop | 4:41.40 |
| 9 | 10 | Jake Adams | 16 | | Louth | 4:46.40 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 21 | Jack Bignell | 15 | | Northampton | 4:33.01 |
| 1 | 23 | Ethan Ford | 16 | | Co Leicester | 4:31.40 |
| 2 | 25 | Harrison Clarke | 15 | | Nova Cent'n | 4:29.40 |
| 3 | 27 | Reuben Fox | 17 | | CarltonForum | 4:28.30 |
| 4 | 29 | Finlay Gibson | 15 | | Co Leicester | 4:28.10 |
| 5 | 28 | Tyler Holland | 15 | | Co Leicester | 4:28.20 |
| 6 | 26 | Edun Rowe | 15 | | Northampton | 4:28.54 |
| 7 | 24 | Manav Mistry | 16 | | Northampton | 4:31.27 |
| 8 | 22 | Sam Gray | 16 | | Northampton | 4:32.90 |
| 9 | 20 | Joshua Clarke | 15 | | Grantham | 4:33.60 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 33 | Kallum Quirke | 17 | | NottmLeander | 4:23.60 |
| 1 | 39 | Joseph Mulligan | 17 | | Bramcote | 4:20.40 |
| 2 | 45 | Luke Stevens | 17 | | Co Leicester | 4:14.00 |
| 3 | 51 | Joseph Kingsland | 20 | | Nova Cent'n | 4:06.70 |
| 4 | 57 | Jack Fleming | 22 | | Lboro Uni | 3:59.20 |
| 5 | 54 | Samuel Tucker | 19 | | Lboro Uni | 4:02.34 |
| 6 | 48 | George Moore | 17 | | Co Leicester | 4:13.12 |
| 7 | 42 | Findlay Cordle | 16 | | Repton | 4:17.05 |
| 8 | 36 | Alfie Bisby | 16 | | South Lincs | 4:21.46 |
| 9 | 30 | Oliver Sorrell | 16 | | South Lincs | 4:27.10 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 34 | Benjamin Gibbons | 16 | | Northampton | 4:23.20 |
| 1 | 40 | Daniel Harris | 16 | | Co Leicester | 4:19.40 |
| 2 | 46 | Samuel Cooke | 17 | | Corby | 4:13.43 |
| 3 | 52 | Jake Hutchinson | 17 | | Co Leicester | 4:05.10 |
| 4 | 58 | Sean McCann | 18 | | Co Leicester | 3:58.74 |
| 5 | 55 | Adam Hall | 22 | | Lboro Uni | 4:00.40 |
| 6 | 49 | Luke Jeal | 20 | | Nova Cent'n | 4:10.50 |
| 7 | 43 | Daniel Walker | 16 | | Nova Cent'n | 4:15.30 |
| 8 | 37 | Oscar Goldsmith | 15 | | South Lincs | 4:20.70 |
| 9 | 31 | Elliott Barker | 16 | | Northampton | 4:26.45 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 35 | Owen Hathway | 17 | | Grantham | 4:22.80 |
| 1 | 41 | Sami Prysor | 16 | | Co Leicester | 4:18.20 |
| 2 | 47 | Jacob Lee | 17 | | Co Leicester | 4:13.40 |
| 3 | 53 | Thomas Sansome | 20 | | Lboro Uni | 4:03.50 |
| 4 | 59 | William Bell | 21 | | Lboro Uni | 3:50.80 |
| 5 | 56 | Alexander Harrand | 18 | | Derby Excel | 4:00.30 |
| 6 | 50 | Elliot Sibley | 18 | | Nova Cent'n | 4:07.70 |
| 7 | 44 | Alex Keeble | 19 | | Leic Sharks | 4:14.40 |
| 8 | 38 | Alex Sadler | 16 | | South Lincs | 4:20.69 |
| 9 | 32 | William Poyser | 18 | | Leic Sharks | 4:25.50 |