EVENT 402 Open/Male 14 /Under 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Toby Smith | 11 | Blackpool Aq | 5:36.76 |
| 4 | 3 | Ethan Jennings | 12 | Preston | 5:33.10 |
| 5 | 2 | Starson Butterworth | 12 | Ramsbottom | 5:35.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Ralph Stockton | 12 | Crewe Flyers | 5:26.80 |
| 2 | 7 | Heath Mason | 12 | Bolton Metro | 5:20.10 |
| 3 | 9 | Alastair Buis | 13 | Carlisle Aq | 5:16.40 |
| 4 | 11 | Ethan Prior | 13 | Ormskirk | 5:15.10 |
| 5 | 10 | Oliver Meggs | 13 | Crewe Flyers | 5:15.40 |
| 6 | 8 | Ben Urmston | 13 | Wigan BEST | 5:16.70 |
| 7 | 6 | Harry Doherty | 12 | Stockport Mo | 5:21.50 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 13 | Andrew Wu | 13 | Trafford Met | 5:14.00 |
| 2 | 15 | Logan Evans | 12 | Blackpool Aq | 5:08.80 |
| 3 | 17 | William Stamper | 13 | Co Liverpool | 5:07.90 |
| 4 | 20 | Antony Ziemer | 12 | Ramsbottom | 5:04.23 |
| 5 | 18 | Alex Murray | 13 | Warrington W | 5:06.13 |
| 6 | 16 | William Thorley | 13 | Aquabears | 5:08.49 |
| 7 | 14 | Jenson Roberts | 11 | Satellite | 5:13.40 |
| 8 | 12 | Felix Nutter | 13 | Burnley BOBC | 5:14.20 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 22 | Sebastian Boughen | 13 | Preston | 5:00.80 |
| 2 | 24 | Thomas Ball | 12 | Co Liverpool | 4:58.00 |
| 3 | 26 | Ethan Craven | 12 | Warrington W | 4:55.14 |
| 4 | 28 | Abel Buso | 14 | Winsford | 4:53.27 |
| 5 | 27 | Albion Dobrushi | 12 | Co Liverpool | 4:54.86 |
| 6 | 25 | Samuel Lutas | 14 | Prescot | 4:57.55 |
| 7 | 23 | Jack Finkemeyer | 14 | Winsford | 4:58.80 |
| 8 | 21 | Sergio Morganella | 13 | Carlisle Aq | 5:00.80 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 30 | Casey Costain | 14 | Wirral Metro | 4:52.40 |
| 2 | 32 | Georgiy Tymchyshen | 14 | Co Manch Aq | 4:48.30 |
| 3 | 34 | Carter Kneale | 14 | Io Man | 4:46.70 |
| 4 | 36 | Harrison Burgess | 13 | Ramsbottom | 4:46.33 |
| 5 | 35 | Oliver Glaister | 14 | Workington | 4:46.60 |
| 6 | 33 | William Brearton | 14 | Wirral Metro | 4:48.10 |
| 7 | 31 | Daniel French | 14 | Wirral Metro | 4:52.30 |
| 8 | 29 | Farron Bigrigg | 14 | Cockermouth | 4:53.00 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 38 | Henry Hodkinson | 14 | Leyland Barr | 4:44.90 |
| 2 | 40 | Ethan Dwyer | 13 | Co Liverpool | 4:43.95 |
| 3 | 42 | George Pearce | 14 | Winsford | 4:41.20 |
| 4 | 44 | James Dixon | 14 | Co Liverpool | 4:39.76 |
| 5 | 43 | Jacob Thistlewood | 13 | Stockport Mo | 4:41.00 |
| 6 | 41 | Oscar Maddrell | 13 | Io Man | 4:42.93 |
| 7 | 39 | Ed Pearson | 14 | Io Man | 4:44.00 |
| 8 | 37 | Jasper De Glopper | 14 | Warrington W | 4:46.00 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 46 | Archie Honey | 14 | Blackpool Aq | 4:38.51 |
| 2 | 49 | Leo Craven | 13 | Warrington W | 4:35.10 |
| 3 | 51 | James Graham | 14 | Co Liverpool | 4:33.22 |
| 4 | 53 | Thomas Rickels | 14 | Co Liverpool | 4:25.41 |
| 5 | 52 | Benji Sutcliffe | 14 | Ramsbottom | 4:30.71 |
| 6 | 50 | Finlay Byrne | 14 | Southport | 4:33.86 |
| 7 | 48 | Gabriel Barnett | 14 | Blackpool Aq | 4:37.52 |
| 8 | 45 | Jacob Irving | 14 | Co Liverpool | 4:39.10 |