EVENT 306 Mixed 09 Yrs/Over 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Isla Richards | 12 | Retford | 7:31.81 |
| 3 | 3 | Harriet Meadows | 11 | Retford | 6:25.00 |
| 4 | 2 | Daisy-Grace Wildish | 9 | Retford | 6:26.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Oscar Durham | 11 | Retford | 6:10.70 |
| 2 | 7 | Maisie Buclaw | 12 | Retford | 5:53.95 |
| 3 | 9 | William Newman-Carter | 11 | Retford | 5:43.51 |
| 4 | 8 | Reid Hutchins | 10 | Retford | 5:45.35 |
| 5 | 6 | Leila Marandi | 10 | Retford | 6:10.13 |
| 6 | 4 | Jayden Cross | 11 | Retford | 6:24.90 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Isla-Rose Wildish | 10 | Retford | 5:36.13 |
| 2 | 13 | Lily Pashley | 13 | Retford | 5:22.03 |
| 3 | 15 | Starla Hope | 14 | Retford | 5:14.84 |
| 4 | 14 | Morgan Hope | 12 | Retford | 5:21.29 |
| 5 | 12 | Alfie Grounsell | 11 | Retford | 5:27.20 |
| 6 | 10 | Summer Woodcock | 10 | Retford | 5:41.72 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Isobelle Rafferty | 13 | Retford | 5:02.00 |
| 2 | 19 | Evie Lilley | 15 | Retford | 4:43.57 |
| 3 | 21 | Layne Keyworth | 16 | Retford | 4:13.26 |
| 4 | 20 | Jennifer Walker | 16 | Retford | 4:33.39 |
| 5 | 18 | Iona Watson | 15 | Retford | 4:52.88 |
| 6 | 16 | Imogen Howitt | 12 | Retford | 5:03.20 |