EVENT 705 Boys 11/14 Yrs 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | William Moore | 12 | Derby Excel | 5:37.41 |
| 4 | 3 | Mark Kiraly | 11 | Nova Cent'n | 5:36.60 |
| 5 | 2 | Noah Dewsnap | 12 | Bassetlaw SS | 5:37.23 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Aaron Sadler | 13 | South Lincs | 5:29.50 |
| 2 | 7 | Nikita Bals | 13 | Northampton | 5:25.50 |
| 3 | 9 | James Huckle | 12 | Lincoln Vulc | 5:23.10 |
| 4 | 11 | Jaidan Mapara | 13 | Leic Sharks | 5:17.00 |
| 5 | 10 | Isaac Ebanks | 13 | Derby Excel | 5:22.50 |
| 6 | 8 | Frank Bacon | 13 | Co Leicester | 5:23.90 |
| 7 | 6 | George Howard | 11 | Leic Sharks | 5:26.50 |
| 8 | 4 | Robbie Duff | 12 | Lincoln Vulc | 5:36.54 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 13 | Oliver Whittaker | 13 | Nova Cent'n | 5:13.40 |
| 2 | 15 | Charlie Bisby | 12 | South Lincs | 5:07.10 |
| 3 | 17 | Hayden Hudson | 13 | Chesterfield | 5:05.60 |
| 4 | 19 | George Cotton | 13 | Derby Excel | 5:05.44 |
| 5 | 18 | Flynn Chidlow | 13 | Ripley | 5:05.60 |
| 6 | 16 | Maxwell Burdett | 11 | Co Leicester | 5:06.80 |
| 7 | 14 | William Newham | 14 | Calv Bing | 5:12.50 |
| 8 | 12 | Ryan Hejraty | 13 | Co Leicester | 5:14.50 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 21 | James Cash | 13 | Deepings | 5:04.40 |
| 2 | 23 | Laurenzio Ciolan | 13 | Northampton | 5:03.10 |
| 3 | 25 | Calin Tomozei | 14 | Chesterfield | 5:02.60 |
| 4 | 27 | Finley Dare | 14 | Corby | 4:56.36 |
| 5 | 26 | Archie French | 14 | Lincoln Vulc | 4:59.30 |
| 6 | 24 | Daniel Hepplestone | 13 | Co Lincoln P | 5:03.00 |
| 7 | 22 | Finley Emery | 14 | Rushden | 5:03.46 |
| 8 | 20 | Oliver Shepherd | 14 | Deepings | 5:04.60 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 31 | Harry Lucas | 13 | Co Leicester | 4:54.30 |
| 2 | 37 | Morgan Farrar | 14 | Co Lincoln P | 4:49.20 |
| 3 | 43 | Harvey-Jay Allsopp | 14 | Nova Cent'n | 4:41.50 |
| 4 | 49 | Samuel Green | 13 | Bassetlaw SS | 4:35.81 |
| 5 | 46 | Jacob Pemberton | 14 | BelperMarlin | 4:37.51 |
| 6 | 40 | Oliver Ashman | 13 | Co Leicester | 4:44.40 |
| 7 | 34 | Seth Hems Gillson | 13 | Repton | 4:51.65 |
| 8 | 28 | Lucas Kimber | 14 | Derby Excel | 4:55.50 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 32 | Oliver Smith | 14 | Nova Cent'n | 4:54.00 |
| 2 | 38 | Eddie Baron | 14 | NottmLeander | 4:48.70 |
| 3 | 44 | Jack Hurry | 14 | Northampton | 4:41.31 |
| 4 | 50 | Reuben Hubinger | 14 | Repton | 4:29.23 |
| 5 | 47 | Austyn Manley | 13 | Nova Cent'n | 4:37.40 |
| 6 | 41 | William Oxley | 13 | Co Leicester | 4:43.30 |
| 7 | 35 | Corey Butterell-Quanbr | 13 | Bassetlaw SS | 4:51.41 |
| 8 | 29 | Freddie Burdett | 13 | Co Leicester | 4:55.30 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 33 | Raymond Dalby-Rose | 13 | Worksop | 4:52.55 |
| 2 | 39 | Brodie Butlin | 14 | Nova Cent'n | 4:48.20 |
| 3 | 45 | Zach Hopkinson | 14 | Grantham | 4:39.20 |
| 4 | 51 | Thomas Swales | 14 | Nova Cent'n | 4:18.50 |
| 5 | 48 | Oliver Davies | 14 | Co Leicester | 4:35.83 |
| 6 | 42 | Liam Lyons | 14 | BelperMarlin | 4:43.16 |
| 7 | 36 | Finlay Bird | 13 | Derby Excel | 4:50.49 |
| 8 | 30 | Jack Welbourne | 14 | Nova Cent'n | 4:55.00 |