EVENT 301 Girl Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Addison CROPPER | 9 | Co Leeds | 7:40.00 |
| 4 | 3 | Mia THOMSON | 10 | Co Leeds | 7:15.00 |
| 5 | 2 | Emilia HARRISON | 10 | Satellite | 7:30.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Amelie COTTERILL | 10 | Co Leeds | 7:05.00 |
| 2 | 7 | Freya ELLIS | 10 | Co Leeds | 6:46.40 |
| 3 | 9 | Layla HOLMES | 13 | Chapeltown | 6:30.00 |
| 4 | 11 | Amit MALTZ | 12 | Co Leeds | 6:21.70 |
| 5 | 10 | Daniella SIMPSON | 15 | Satellite | 6:28.80 |
| 6 | 8 | Lilly ROYLE | 11 | Satellite | 6:34.80 |
| 7 | 6 | Elizabeth BOND | 10 | Co Leeds | 6:59.25 |
| 8 | 4 | Amelia MATSON | 10 | Co Leeds | 7:06.36 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 13 | Eleanor BRIDGMAN | 14 | Co Wakefield | 6:15.00 |
| 1 | 15 | Isabelle KING | 13 | Co Leeds | 6:13.28 |
| 2 | 17 | Florence DIXON | 11 | Co Leeds | 5:56.90 |
| 3 | 19 | Letian WU | 13 | Trafford Met | 5:54.76 |
| 4 | 21 | Elisha RHODES | 15 | Middlesboro | 5:51.40 |
| 5 | 20 | Sally KNIGHT | 13 | Satellite | 5:53.80 |
| 6 | 18 | Aimee KEEFE | 13 | Co Wakefield | 5:56.80 |
| 7 | 16 | Purdy ROBERTS | 14 | Bo Barnsley | 5:58.80 |
| 8 | 14 | Evie WESTON | 13 | Sedgefield | 6:15.00 |
| 9 | 12 | Ava BRADLEY | 12 | Co Leeds | 6:20.10 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 23 | Ruby ELLIS | 14 | Co Leeds | 5:45.67 |
| 1 | 25 | Grace EDWARDS | 14 | Satellite | 5:37.10 |
| 2 | 27 | Mei YUASA | 12 | Co Leeds | 5:35.66 |
| 3 | 29 | Rose KEEFE | 14 | Co Wakefield | 5:31.60 |
| 4 | 32 | Megan CAIRNS | 17 | Middlesboro | 5:22.60 |
| 5 | 31 | Lois CHILD | 12 | Harrogate | 5:24.10 |
| 6 | 28 | Anna FENWICK | 14 | Satellite | 5:34.70 |
| 7 | 26 | Aira WILKINSON | 13 | Co Leeds | 5:37.10 |
| 8 | 24 | Amelia WRIGHT | 12 | Harrogate | 5:43.70 |
| 9 | 22 | Robyn HOWARD | 12 | Co Leeds | 5:47.10 |