EVENT 211 Female 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 2 | Harper ASPINALL | 12 | Wirral Metro | 5:41.10 |
| 1 | 4 | Ava HALLIWELL | 13 | Wirral Metro | 5:39.34 |
| 2 | 6 | Lexie GODDARD | 14 | Donc Dartes | 5:36.40 |
| 3 | 8 | Isabel OWEN-HOLT | 15 | Wigan BEST | 5:34.70 |
| 4 | 10 | Jessica EGGITT | 15 | Donc Dartes | 5:30.20 |
| 5 | 9 | Alba KNELLER | 13 | RichmondDale | 5:32.16 |
| 6 | 7 | Florence DIXON | 13 | Co Leeds | 5:35.90 |
| 7 | 5 | Ella JORDAN | 14 | Co Leeds | 5:38.70 |
| 8 | 3 | M AZANA-BALL | 13 | Co Leeds | 5:39.42 |
| 9 | 1 | Erin BENTLEY | 13 | Co Leeds | 5:48.10 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 12 | Holly HARRISON | 14 | Co Leeds | 5:29.92 |
| 1 | 14 | Vivien WILKINSON | 13 | Wirral Metro | 5:29.70 |
| 2 | 16 | Lauren BERRY | 14 | Wirral Metro | 5:27.80 |
| 3 | 18 | Mia TRAVIS-JONES | 14 | Co Leeds | 5:26.77 |
| 4 | 20 | Kiera BINNS | 15 | Donc Dartes | 5:25.10 |
| 5 | 19 | Samantha TAYLOR | 13 | York City | 5:25.85 |
| 6 | 17 | Elkie FOSTER | 13 | Co Leeds | 5:27.41 |
| 7 | 15 | Robyn HOWARD | 14 | Co Leeds | 5:29.20 |
| 8 | 13 | Olivia KNOX | 13 | Wigan BEST | 5:29.80 |
| 9 | 11 | Keira JOHNSON | 14 | Wigan BEST | 5:30.16 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 23 | S HUTCHINSON THOMPSON | 16 | Co Salford | 5:24.40 |
| 1 | 27 | Hannah BRUCE | 15 | South Lincs | 5:20.80 |
| 2 | 31 | Mei YUASA | 14 | Co Leeds | 5:14.05 |
| 3 | 35 | Lily HORTON | 16 | Wirral Metro | 5:12.35 |
| 4 | 39 | Evie CUTTER | 15 | Wigan BEST | 5:08.90 |
| 5 | 37 | Isabel HANDLEY | 15 | Co Leeds | 5:10.46 |
| 6 | 33 | Maisy SMITH | 19 | KingstonHull | 5:13.20 |
| 7 | 29 | Molly NORTON | 14 | Co Leeds | 5:18.27 |
| 8 | 25 | Gina WARRIOR | 18 | Co Bradford | 5:21.40 |
| 9 | 21 | Isabelle HALL | 13 | Co Leeds | 5:24.71 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 24 | Hannah FINNEY | 15 | Cosacss | 5:21.70 |
| 1 | 28 | Poppy NUTTMAN | 14 | Spenborough | 5:20.00 |
| 2 | 32 | Elizabeth WARNER | 14 | Co Leeds | 5:13.80 |
| 3 | 36 | Sophia GLEDHILL | 17 | Co Bradford | 5:10.80 |
| 4 | 40 | Eve HORTON | 18 | Wigan BEST | 5:06.60 |
| 5 | 38 | Matilda ASHCROFT | 16 | Co Leeds | 5:09.90 |
| 6 | 34 | Olivia ANSTEY | 16 | Louth | 5:12.90 |
| 7 | 30 | Francesca HALLAM-STOTT | 17 | Grantham | 5:16.40 |
| 8 | 26 | Megan CAIRNS | 19 | AJ Newcastle | 5:21.07 |
| 9 | 22 | Elizabeth DIXON | 15 | Co Leeds | 5:24.45 |