EVENT 408 Girls Open 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | EVA WRIGHT | 12 | Chesterfield | |
| 3 | 3 | ISLA COLLUMBELL | 12 | DerbyPhoenix | |
| 4 | 5 | MAISIE BUCLAW | 10 | Retford | |
| 5 | 4 | CHARLOTTE BROWNLESS | 11 | Lincoln TSA | |
| 6 | 2 | ROISIN POWER | 11 | DerbyPhoenix | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 7 | SEREN MASON | 9 | Hucknall | 7:25.00 |
| 2 | 9 | ABIGAIL JINKS | 10 | Co Sheffield | 6:58.01 |
| 3 | 11 | MARIANA GARCIA | 9 | Co Sheffield | 6:48.01 |
| 4 | 13 | FELICITY WINDER | 10 | Co Sheffield | 6:38.01 |
| 5 | 12 | MOLLY HUGHES | 12 | Co Sheffield | 6:48.01 |
| 6 | 10 | IMOGEN MARSHALL | 9 | Co Sheffield | 6:48.01 |
| 7 | 8 | CHARLOTTE KAY | 11 | Chesterfield | 7:06.02 |
| 8 | 6 | ERIN WILLIAMS | 13 | Eckington | 7:30.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 15 | ORLA WOODWARD | 11 | Buxton | 6:35.00 |
| 2 | 17 | GRACIE ROGERS | 11 | Co Sheffield | 6:30.01 |
| 3 | 19 | MOLLY BUCKLEY | 11 | Co Sheffield | 6:15.21 |
| 4 | 21 | ESMEE DOWNES | 13 | Derby Excel | 6:13.38 |
| 5 | 20 | RUBY PODMORE | 10 | Co Sheffield | 6:14.40 |
| 6 | 18 | CHRISTABELLA TURNER | 14 | Eckington | 6:30.00 |
| 7 | 16 | MIA WALLACE | 11 | Chesterfield | 6:30.43 |
| 8 | 14 | ROSIE HAIGH | 11 | Co Sheffield | 6:36.50 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 23 | ESMAE IRONS | 11 | Sherwood | 6:00.00 |
| 2 | 25 | EVELYN JONES | 12 | Co Sheffield | 5:47.83 |
| 3 | 27 | LILY-GRACE BELFIELD | 12 | Chesterfield | 5:41.62 |
| 4 | 29 | ANNABEL BAGSHAW | 13 | Buxton | 5:37.01 |
| 5 | 28 | LUCY REDMOND | 13 | Chesterfield | 5:40.43 |
| 6 | 26 | AMY CHOULARTON | 12 | Co Manch Aq | 5:42.78 |
| 7 | 24 | MILLIE FLAXMAN | 13 | Co Sheffield | 5:48.40 |
| 8 | 22 | EZMAE ALLEN | 10 | Co Sheffield | 6:13.30 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 31 | JESSICA WHITE | 11 | NottmLeander | 5:32.60 |
| 2 | 33 | SOPHIE BELL | 12 | Co Sheffield | 5:28.23 |
| 3 | 35 | DAISY SIMPSON | 15 | Co Sheffield | 5:25.01 |
| 4 | 37 | ABIGAIL HODGES | 12 | Chesterfield | 5:20.02 |
| 5 | 36 | SOPHIA LEWIS | 15 | Derby Excel | 5:23.20 |
| 6 | 34 | ZOE PARSONS | 14 | Lincoln TSA | 5:26.81 |
| 7 | 32 | ELLA RATLIFF | 14 | Derby Excel | 5:28.40 |
| 8 | 30 | ORLA GIBBON | 12 | Co Sheffield | 5:35.60 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 39 | ANWEN WILLIAMS | 13 | Buxton | 5:11.69 |
| 2 | 41 | AMELIA DENHAM | 14 | Chesterfield | 4:50.17 |
| 3 | 43 | OLIVIA BELL | 14 | Co Sheffield | 4:47.50 |
| 4 | 45 | KT TAYLOR | 17 | Chesterfield | 4:40.00 |
| 5 | 44 | HELEN SHARRATT | 17 | DerbyPhoenix | 4:45.00 |
| 6 | 42 | SOPHIE MILLIDGE | 16 | Swadlincote | 4:49.53 |
| 7 | 40 | KYRA WINTER | 12 | Chesterfield | 5:00.46 |
| 8 | 38 | DAISY HAIGH | 15 | Co Sheffield | 5:15.40 |