EVENT 201 Female 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Annabel SHEPHERD | 11 | Deepings SC | 7:43.60 |
| 3 | 3 | Lottie Ava FLATTERS | 11 | Deepings SC | 7:11.76 |
| 4 | 2 | Lucy JENKINSON | 12 | Deepings SC | 7:32.20 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Rosie JONES | 13 | Deepings SC | 7:00.00 |
| 2 | 6 | Ava MACKFALL | 13 | Lincoln Vulcans SC | 6:53.88 |
| 3 | 8 | Cecilia BRUTTON | 12 | Solihull SC | 6:27.53 |
| 4 | 7 | Peyton BRIGHT | 12 | Lincoln Vulcans SC | 6:33.94 |
| 5 | 5 | Florence HENDERSON | 11 | Lincoln Vulcans SC | 6:55.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 10 | Charlotte TURNER | 13 | Lincoln Vulcans SC | 6:27.22 |
| 2 | 12 | Isla SCOTT | 13 | Lincoln Vulcans SC | 6:18.67 |
| 3 | 14 | Alexandra BULAT | 17 | City of Linc Pentaqua SC | 5:10.00 |
| 4 | 13 | Isla STOCKLEY | 11 | Bassetlaw Swim Squad | 6:13.16 |
| 5 | 11 | Bronte EASEY | 11 | Bassetlaw Swim Squad | 6:20.12 |
| 6 | 9 | Emily HUNT | 13 | Lincoln Vulcans SC | 6:27.36 |