EVENT 101 Mixed 09 Yrs/Over 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 2 | Leila Marandi | 10 | Retford | 6:58.70 |
| 2 | 4 | Lily Pashley | 13 | Retford | 6:06.19 |
| 3 | 6 | Isobelle Rafferty | 13 | Retford | 5:43.40 |
| 4 | 5 | Bronte Easey | 12 | Retford | 5:58.70 |
| 5 | 3 | Alfie Grounsell | 11 | Retford | 6:24.70 |
| 6 | 1 | Jayden Cross | 11 | Retford | 7:00.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 8 | Imogen Howitt | 12 | Retford | 5:37.61 |
| 2 | 10 | C Butterell-Quanbrough | 14 | Retford | 5:21.10 |
| 3 | 12 | Samuel Green | 14 | Retford | 4:55.03 |
| 4 | 11 | Thomas Collins | 14 | Retford | 5:02.84 |
| 5 | 9 | Noah Dewsnap | 13 | Retford | 5:32.70 |
| 6 | 7 | Iona Watson | 15 | Retford | 5:43.15 |