EVENT 301 Girl Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 1 | Lily VEEVERS | 10 | Co Leeds | 7:40.40 |
| 1 | 3 | Elizabeth BOND | 9 | Co Leeds | 7:30.00 |
| 2 | 5 | Elizabeth WARNER | 11 | Co Leeds | 7:08.40 |
| 3 | 7 | Stephanie DALY | 12 | Cleethorpes | 7:00.00 |
| 4 | 9 | Summer SMITH | 10 | Co Sheffield | 6:58.19 |
| 5 | 8 | Isabelle HALL | 10 | Co Leeds | 7:00.00 |
| 6 | 6 | Rosie HAIGH | 9 | Co Sheffield | 7:00.00 |
| 7 | 4 | Anabella CHAMBERS | 12 | Co Leeds | 7:10.90 |
| 8 | 2 | Elkie FOSTER | 10 | Co Leeds | 7:39.83 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 11 | Robyn HOWARD | 11 | Co Leeds | 6:53.30 |
| 1 | 13 | Isla DAVERAN | 10 | Co Sheffield | 6:50.00 |
| 2 | 15 | M AZANA-BALL | 10 | Co Leeds | 6:45.00 |
| 3 | 17 | Florence DIXON | 10 | Co Leeds | 6:41.30 |
| 4 | 19 | Abigail BEIGHTON | 11 | Co Sheffield | 6:35.00 |
| 5 | 18 | Daisy SIMPSON | 13 | Co Sheffield | 6:35.00 |
| 6 | 16 | Evie WOODS | 12 | Co Leeds | 6:44.70 |
| 7 | 14 | Evelyn KIK | 10 | Co Sheffield | 6:45.00 |
| 8 | 12 | Ella JORDAN | 11 | Co Leeds | 6:51.10 |
| 9 | 10 | Gracie ROGERS | 10 | Co Sheffield | 6:55.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 21 | Molly NORTON | 11 | Co Leeds | 6:26.18 |
| 1 | 23 | Jessica WOODS | 11 | Co Leeds | 6:04.70 |
| 2 | 25 | Ruby DIMENT | 14 | Darlington | 5:48.24 |
| 3 | 27 | Eleanor VALENTINE-BULL | 15 | Bo Barnsley | 5:40.60 |
| 4 | 29 | Evie GLOSSOP | 16 | Co Sheffield | 5:31.60 |
| 5 | 28 | Elizabeth DIXON | 12 | Co Leeds | 5:33.20 |
| 6 | 26 | Chloe MALONEY | 12 | Co Leeds | 5:43.50 |
| 7 | 24 | Eva KNIGHT | 13 | Spenborough | 5:55.40 |
| 8 | 22 | Tylan FLETCHER | 12 | Co Leeds | 6:22.50 |
| 9 | 20 | Purdy ROBERTS | 13 | Bo Barnsley | 6:30.00 |