EVENT 211 Girl Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Mei YUASA | 12 | Co Leeds | 5:46.13 |
| 2 | 3 | Olivia WATTS | 13 | Warrington W | 5:40.70 |
| 3 | 5 | Charlotte SHAW | 14 | Co Leeds | 5:37.53 |
| 4 | 7 | Isobel HITCHMOUGH | 13 | Warrington W | 5:35.60 |
| 5 | 6 | Isabel LLOYD | 14 | Wigan BEST | 5:37.45 |
| 6 | 4 | Isabelle CHILD | 14 | Donc Dartes | 5:37.67 |
| 7 | 2 | Aira WILKINSON | 13 | Co Leeds | 5:42.28 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 9 | Isabel HANDLEY | 13 | Co Leeds | 5:32.50 |
| 1 | 11 | Greta HIGHFIELD | 14 | Donc Dartes | 5:28.92 |
| 2 | 13 | Matilda POTTER | 14 | Co Leeds | 5:28.73 |
| 3 | 15 | Beatrice FINCH | 16 | South Lincs | 5:27.50 |
| 4 | 17 | Emilia CIESZCZYK | 15 | Northampton | 5:26.55 |
| 5 | 16 | Abby MITCHELL | 16 | Leic Sharks | 5:26.70 |
| 6 | 14 | Payton CHESTERS | 14 | Warrington W | 5:28.60 |
| 7 | 12 | Lydia KEELEY | 17 | Stockport Mo | 5:28.90 |
| 8 | 10 | Jasmine BOUAZIZ | 13 | Warrington W | 5:31.10 |
| 9 | 8 | Matilda ASHCROFT | 14 | Co Leeds | 5:33.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 20 | Evie HARRIS | 14 | Co Leeds | 5:23.19 |
| 1 | 24 | Kasja RICKELTON | 16 | Co Leeds | 5:21.03 |
| 2 | 28 | Emily OLIVER | 16 | Bo Kirklees | 5:18.90 |
| 3 | 32 | Evangeline STACEY | 15 | Co Leeds | 5:16.98 |
| 4 | 36 | Madison JOHNSON | 17 | Donc Dartes | 5:06.10 |
| 5 | 34 | Daisy PURCHASE | 16 | Rotherham Mo | 5:10.90 |
| 6 | 30 | Darcey CROSSLEY | 14 | Co Leeds | 5:17.86 |
| 7 | 26 | Eve HORTON | 16 | Wigan BEST | 5:20.40 |
| 8 | 22 | Lauren LILLEY | 14 | Co Leeds | 5:21.97 |
| 9 | 18 | Sophie RAMSHAW | 13 | Co Leeds | 5:23.60 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 21 | Charlotte MORETON | 14 | Co Leeds | 5:22.31 |
| 1 | 25 | Evie CUTTER | 13 | Wigan BEST | 5:20.51 |
| 2 | 29 | Lauren JONES | 17 | Warrington W | 5:18.40 |
| 3 | 33 | Emily BROOK | 18 | Bo Kirklees | 5:16.10 |
| 4 | 37 | Olivia MOLDEN | 18 | Warrington W | 5:05.48 |
| 5 | 35 | Yasmine SHEFFIELD | 18 | Leic Sharks | 5:10.50 |
| 6 | 31 | Jessica REILLY | 16 | Harrogate | 5:17.30 |
| 7 | 27 | Chloe RIDGE | 15 | Wigan BEST | 5:19.70 |
| 8 | 23 | Sophie MARTIN | 15 | Chesterfield | 5:21.90 |
| 9 | 19 | Kerry HENNIE | 14 | Warrington W | 5:23.50 |