EVENT 401 Open/Male 10 /Over 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Thomas Hinde | 10 | RichmondDale | 7:41.65 |
| 4 | 3 | Thomas Andrews | 11 | Saltburn Mar | 6:53.46 |
| 5 | 2 | Harvey Watson | 11 | Middlesboro | 7:01.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 5 | Max DING | 11 | Derwent&Gate | 6:30.00 |
| 3 | 7 | William Moore | 10 | Eston | 6:12.78 |
| 4 | 9 | Joe Horner | 11 | Eston | 5:48.04 |
| 5 | 8 | Josh Reddivari | 11 | Middlesboro | 5:57.61 |
| 6 | 6 | William Sapstead | 11 | Middlesboro | 6:23.00 |
| 7 | 4 | Evan JENKINSON | 12 | Derwent&Gate | 6:35.90 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Shay Downey | 13 | Middlesboro | 5:22.70 |
| 2 | 13 | Jake Reddivari | 11 | Middlesboro | 5:08.08 |
| 3 | 15 | Adam Shipley | 11 | Middlesboro | 5:00.40 |
| 4 | 17 | Ethan Reddivari | 13 | Middlesboro | 4:59.50 |
| 5 | 16 | Jack Waterson | 12 | Middlesboro | 5:00.00 |
| 6 | 14 | Stanley Dawson | 13 | Middlesboro | 5:01.01 |
| 7 | 12 | Orin Connolly | 12 | Middlesboro | 5:13.08 |
| 8 | 10 | Joe Dumphy-Brook | 10 | Middlesboro | 5:23.17 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 19 | Austin McKenna | 12 | Middlesboro | 4:51.40 |
| 2 | 21 | Jacob Redding | 13 | Middlesboro | 4:45.92 |
| 3 | 23 | Joshua Young | 16 | Middlesboro | 4:38.63 |
| 4 | 25 | Finn Ripley | 17 | Middlesboro | 4:11.25 |
| 5 | 24 | Edward Redshaw | 16 | Middlesboro | 4:22.00 |
| 6 | 22 | Benjamin Wright | 14 | Middlesboro | 4:45.13 |
| 7 | 20 | P Stephenson-Mangan | 16 | Eston | 4:50.33 |
| 8 | 18 | Max Burns | 14 | Guisborough | 4:58.45 |