EVENT 401 Mens 14 Yrs/Over 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 3 | 1 | William Whitehead | 14 | S8 | Derventio | 6:53.60 |
| 4 | 3 | Connor Boyfield | 21 | S9 | Boston | 5:28.28 |
| 5 | 2 | Kian Saville | 19 | S10 | Daventry | 6:28.31 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 5 | Alexander Harrand | 14 | | Long Eaton | 4:49.10 |
| 2 | 7 | Robert Taylor | 14 | | Corby | 4:48.80 |
| 3 | 9 | Adam Read | 14 | | Nova Cent'n | 4:48.00 |
| 4 | 11 | James Dobney | 15 | | Grantham | 4:39.60 |
| 5 | 10 | William Poyser | 14 | | Leic Sharks | 4:39.86 |
| 6 | 8 | Sammy Rahimzadeh | 14 | | Nova Cent'n | 4:48.70 |
| 7 | 6 | Lewis Meade | 14 | | Nova Cent'n | 4:49.00 |
| 8 | 4 | Matthew Jackson | 14 | | Nova Cent'n | 4:49.58 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 0 | 13 | Elliot Sibley | 14 | | Nova Cent'n | 4:37.87 |
| 1 | 15 | Connor Byron | 14 | | NottmLeander | 4:36.40 |
| 2 | 17 | Max Davies | 14 | | Nova Cent'n | 4:34.61 |
| 3 | 19 | Ashley Lucas | 14 | | Northampton | 4:32.04 |
| 4 | 21 | Sean McCann | 14 | | Co Leicester | 4:30.82 |
| 5 | 20 | Atticus Strickland | 16 | | South Lincs | 4:31.80 |
| 6 | 18 | Charlie Miller | 14 | | Skegness | 4:32.90 |
| 7 | 16 | Joseph Vickers | 14 | | Boston | 4:35.90 |
| 8 | 14 | Samuel Smith | 14 | | Northampton | 4:37.58 |
| 9 | 12 | Henry Crust | 14 | | Co Lincoln P | 4:38.10 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 0 | 23 | Razvan Grumazescu | 15 | | Northampton | 4:30.43 |
| 1 | 25 | Callum Kettlewell | 15 | | Bassetlaw SS | 4:29.00 |
| 2 | 27 | Sandy Jarvis | 17 | | Loughborough | 4:28.20 |
| 3 | 29 | Tom Trueman | 15 | | Nova Cent'n | 4:25.77 |
| 4 | 31 | Cillian McGuinness | 14 | | Bassetlaw SS | 4:25.29 |
| 5 | 30 | Rhys James | 19 | | Daventry | 4:25.70 |
| 6 | 28 | Rico Bringeman | 14 | | Boston | 4:26.80 |
| 7 | 26 | Connor Thorpe | 14 | | Derventio | 4:28.38 |
| 8 | 24 | Alex Keeble | 15 | | Leic Sharks | 4:30.04 |
| 9 | 22 | Samual Nicholls | 15 | | Chesterfield | 4:30.50 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 0 | 33 | Luke Blanchard | 18 | | South Lincs | 4:23.50 |
| 1 | 35 | Toma Tokiwa-Smith | 16 | | Co Derby | 4:22.80 |
| 2 | 37 | Kieran Flint | 21 | | Leic Sharks | 4:22.80 |
| 3 | 39 | Matthew Smith | 17 | | Northampton | 4:21.42 |
| 4 | 41 | Thomas Currie | 15 | | Northampton | 4:20.44 |
| 5 | 40 | Harvey Freeman | 15 | | Northampton | 4:21.22 |
| 6 | 38 | Luke Jeal | 16 | | Leic Sharks | 4:22.68 |
| 7 | 36 | George Lowe | 16 | | Co Leicester | 4:22.80 |
| 8 | 34 | William Beasley | 16 | | Co Leicester | 4:23.20 |
| 9 | 32 | Patrick Mahney | 16 | | Northampton | 4:25.13 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 0 | 43 | Finlay Chapman | 18 | | Braunstone | 4:19.20 |
| 1 | 45 | Adam Banks | 16 | | Derventio | 4:18.60 |
| 2 | 47 | Jack Price | 17 | | Chesterfield | 4:18.10 |
| 3 | 49 | Joshua Vance | 16 | | Northampton | 4:15.52 |
| 4 | 51 | Aron Preece | 20 | | Nova Cent'n | 4:13.59 |
| 5 | 50 | Jack Gartside | 16 | | Northampton | 4:14.87 |
| 6 | 48 | Liam Dawson | 14 | | Nova Cent'n | 4:18.07 |
| 7 | 46 | Daniel Kennedy | 15 | | Co Leicester | 4:18.41 |
| 8 | 44 | Samuel Littler | 16 | | Derventio | 4:18.74 |
| 9 | 42 | Thomas Stevens | 19 | | Daventry | 4:20.02 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 0 | 54 | Isaac Von Fintel | 18 | | Co Derby | 4:11.50 |
| 1 | 58 | Jevon Penny | 16 | | Northampton | 4:08.30 |
| 2 | 62 | Joseph Sadler | 16 | | Nova Cent'n | 4:06.80 |
| 3 | 66 | Archie Plowman | 18 | | Northampton | 4:02.54 |
| 4 | 70 | Max Murphy | 19 | | Loughboro Un | 3:57.30 |
| 5 | 68 | Edward Mildred | 16 | | Northampton | 3:59.16 |
| 6 | 64 | Liam Snook | 21 | | Northampton | 4:05.20 |
| 7 | 60 | Ryan Huddart | 18 | | Derventio | 4:08.05 |
| 8 | 56 | Joshua Skinner | 16 | | Nova Cent'n | 4:11.30 |
| 9 | 52 | Andrew Hall | 16 | | Nova Cent'n | 4:12.60 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 0 | 55 | Joey Tippin | 16 | | Co Leicester | 4:11.50 |
| 1 | 59 | Samuel Blackett | 21 | | Northampton | 4:08.26 |
| 2 | 63 | Jacob Whittle | 15 | | Derventio | 4:06.44 |
| 3 | 67 | Charlie Poole | 18 | | Co Leicester | 3:59.31 |
| 4 | 71 | William Bell | 17 | | Co Leicester | 3:54.87 |
| 5 | 69 | Ryan Reader | 21 | | Derventio | 3:58.70 |
| 6 | 65 | Jack Buswell | 18 | | Northampton | 4:04.93 |
| 7 | 61 | Jackson O'Rourke | 17 | | Northampton | 4:07.46 |
| 8 | 57 | Alexander Bregazzi | 21 | | Loughboro Un | 4:09.00 |
| 9 | 53 | Joseph Kingsland | 16 | | Nova Cent'n | 4:12.14 |