EVENT 401 Mixed 13 Yrs/Over 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Faith BENSON | 15 | Bo Barnsley | 7:07.41 |
| 4 | 3 | Sophie COLE | 13 | Lincoln Vulc | 6:18.28 |
| 5 | 2 | Karolina PARKINSON | 14 | Lincoln Vulc | 6:19.81 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 5 | Ava MACKFALL | 14 | Lincoln Vulc | 5:49.25 |
| 1 | 7 | Peyton BRIGHT | 13 | Lincoln Vulc | 5:35.82 |
| 2 | 9 | Riley SYKES | 14 | Bo Barnsley | 5:33.00 |
| 3 | 11 | Anna SIMMONS | 16 | Lincoln Vulc | 5:31.04 |
| 4 | 13 | Owen TEMPEST | 13 | Co Leeds | 5:24.70 |
| 5 | 12 | Evie Mae WALLACE | 13 | Co Leeds | 5:25.50 |
| 6 | 10 | Iris FRENCH | 13 | Lincoln Vulc | 5:32.78 |
| 7 | 8 | Lily VEEVERS | 13 | Co Leeds | 5:34.81 |
| 8 | 6 | Maisie ASMAN | 14 | Lincoln Vulc | 5:40.70 |
| 9 | 4 | Robbie DUFF | 13 | Lincoln Vulc | 6:05.38 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 15 | Eleanor BIRINY | 13 | Lincoln Vulc | 5:22.63 |
| 1 | 17 | Hollie MAWSON | 15 | Co Bradford | 5:11.50 |
| 2 | 19 | Callum FOZARD | 13 | Co Leeds | 5:09.00 |
| 3 | 21 | Kai MAYERS | 14 | Co Bradford | 5:06.35 |
| 4 | 23 | Ciara O'CARROLL | 15 | Co Bradford | 5:02.20 |
| 5 | 22 | Gracie-May COLE | 16 | Lincoln Vulc | 5:04.00 |
| 6 | 20 | Joshua CRAVEN | 15 | Co Bradford | 5:07.05 |
| 7 | 18 | Tylan FLETCHER | 15 | Co Leeds | 5:11.30 |
| 8 | 16 | Pippa SMITH | 14 | Co Bradford | 5:14.50 |
| 9 | 14 | Isla SCOTT | 13 | Lincoln Vulc | 5:23.34 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 25 | Millie HERBERT | 14 | Bo Barnsley | 5:01.50 |
| 1 | 27 | Alfie CRAGGS | 13 | Co Leeds | 4:57.80 |
| 2 | 29 | Lauren WATKINS | 15 | Prescot | 4:56.30 |
| 3 | 31 | Jack HICKS | 14 | Lincoln Vulc | 4:51.68 |
| 4 | 33 | Oliver ATHA | 13 | Co Leeds | 4:49.70 |
| 5 | 32 | Annabelle HARRISON | 14 | Bo Barnsley | 4:51.40 |
| 6 | 30 | Oliver BARRETT | 13 | Co Leeds | 4:53.70 |
| 7 | 28 | Ben ARTIS | 13 | Co Bradford | 4:57.50 |
| 8 | 26 | Megan LAMB | 14 | Lincoln Vulc | 5:00.46 |
| 9 | 24 | Ella JORDAN | 14 | Co Leeds | 5:02.00 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 35 | Millie WALKER | 15 | Co Leeds | 4:49.20 |
| 1 | 37 | Jeffrey LANGE | 13 | Co Leeds | 4:47.90 |
| 2 | 39 | Poppy NUTTMAN | 14 | Spenborough | 4:44.30 |
| 3 | 41 | Matthew MENZER | 16 | Co Wakefield | 4:41.99 |
| 4 | 43 | William DUNN | 13 | Co Leeds | 4:38.60 |
| 5 | 42 | Noah DARNELL | 13 | Co Leeds | 4:39.30 |
| 6 | 40 | Dexter WOODWARD | 15 | Co Bradford | 4:44.10 |
| 7 | 38 | Ava CONNELL | 15 | Co Leeds | 4:47.30 |
| 8 | 36 | Harry VICKERS | 16 | Lincoln Vulc | 4:48.17 |
| 9 | 34 | Darcey BLACKER | 15 | Co Leeds | 4:49.31 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 45 | Archie FRENCH | 15 | Lincoln Vulc | 4:38.18 |
| 1 | 47 | James THOMSON | 14 | Co Leeds | 4:36.90 |
| 2 | 49 | Sophia GLEDHILL | 17 | Co Bradford | 4:31.87 |
| 3 | 51 | Holly MARSHALL | 18 | Lincoln Vulc | 4:21.60 |
| 4 | 53 | Dawid NAGLIK | 16 | Co Bradford | 4:09.80 |
| 5 | 52 | Cameron RHODES | 19 | Rotherham Mo | 4:15.10 |
| 6 | 50 | Charlie HINSON | 16 | Co Leeds | 4:25.20 |
| 7 | 48 | Samuel ROBERTS | 16 | Co Bradford | 4:36.41 |
| 8 | 46 | George CARRY | 16 | Co Leeds | 4:37.17 |
| 9 | 44 | Alfie YOUNG | 15 | Co Leeds | 4:38.20 |