EVENT 201 Men 14 Yrs/Over 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 2 | Scott Miller | 15 | Nova Cent'n | 5:26.80 |
| 3 | 4 | Luke Chambers | 14 | Nova Cent'n | 5:20.42 |
| 4 | 6 | Reuben Fox | 16 | Nova Cent'n | 5:17.74 |
| 5 | 5 | Finlay Gibson | 14 | Co Leicester | 5:19.86 |
| 6 | 3 | Jack Bignell | 14 | Northampton | 5:22.80 |
| 7 | 1 | Tommy Blacklaws | 14 | Leic Sharks | 5:30.70 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 8 | Finn Reed | 15 | Loughborough | 5:14.90 |
| 1 | 10 | Ethan Ford | 15 | Co Leicester | 5:14.00 |
| 2 | 12 | Sam Gray | 15 | Northampton | 5:12.40 |
| 3 | 14 | Kallum Quirke | 16 | Nova Cent'n | 5:11.60 |
| 4 | 16 | Owen Hathway | 16 | Grantham | 5:10.80 |
| 5 | 15 | Oscar Goldsmith | 14 | South Lincs | 5:10.90 |
| 6 | 13 | Harrison Clarke | 14 | Nova Cent'n | 5:11.70 |
| 7 | 11 | Harry Brancham | 16 | Bassetlaw SS | 5:13.76 |
| 8 | 9 | Niklas Saukko-Paavola | 14 | Nova Cent'n | 5:14.40 |
| 9 | 7 | Lewis Fitch | 15 | Co Leicester | 5:17.15 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 20 | Paul Page | 15 | Co Leicester | 5:07.10 |
| 1 | 26 | Sam Leveridge | 16 | Grantham | 5:03.40 |
| 2 | 32 | James Lake | 15 | Loughborough | 4:57.30 |
| 3 | 38 | Alex Keeble | 18 | Leic Sharks | 4:45.00 |
| 4 | 44 | Harvey Freeman | 18 | Northampton | 4:30.10 |
| 5 | 41 | Charles Kershaw | 20 | Loughboro Un | 4:33.52 |
| 6 | 35 | Findlay Cordle | 15 | Repton | 4:51.30 |
| 7 | 29 | Oliver Oxley | 16 | Co Leicester | 5:00.60 |
| 8 | 23 | Charlie James | 16 | Co Leicester | 5:05.30 |
| 9 | 17 | Joseph Mulligan | 16 | Bramcote | 5:08.70 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 21 | Finnley Danby | 16 | Boston | 5:06.30 |
| 1 | 27 | Alfie Bisby | 15 | South Lincs | 5:02.51 |
| 2 | 33 | Jasper Jones | 15 | Northampton | 4:54.94 |
| 3 | 39 | Elliot Sibley | 17 | Nova Cent'n | 4:44.50 |
| 4 | 45 | Jackson O'Rourke | 20 | Northampton | 4:30.02 |
| 5 | 42 | Joshua Vance | 19 | Northampton | 4:32.60 |
| 6 | 36 | Thomas Dixon | 17 | Leic Sharks | 4:51.30 |
| 7 | 30 | Daniel Walker | 15 | Nova Cent'n | 5:00.20 |
| 8 | 24 | Archie Heron | 16 | Derventio | 5:04.47 |
| 9 | 18 | Oliver Stone | 14 | Derventio | 5:07.90 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 22 | Archie Dandy | 14 | Co Leicester | 5:05.80 |
| 1 | 28 | Leo Allanson | 16 | Derventio | 5:01.90 |
| 2 | 34 | James Dobney | 18 | Grantham | 4:54.40 |
| 3 | 40 | Rico Bringeman | 17 | South Lincs | 4:36.80 |
| 4 | 46 | Finley Bunhejee | 17 | Derventio | 4:29.00 |
| 5 | 43 | Daniel Kennedy | 18 | Repton | 4:30.10 |
| 6 | 37 | Samual Nicholls | 18 | Repton | 4:50.60 |
| 7 | 31 | Callum Kettlewell | 18 | Bassetlaw SS | 4:58.00 |
| 8 | 25 | Samuel Cooke | 16 | Corby | 5:04.13 |
| 9 | 19 | G Sierra Villegas | 17 | Chesterfield | 5:07.70 |