EVENT 306 Boy/Girl 09 Yrs/Over 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Thoedore Pearson | 9 | Retford | 9:40.00 |
| 3 | 3 | Matthew Tate-Hill | 12 | Retford | 8:48.00 |
| 4 | 2 | Alfie Grounsell | 9 | Retford | 9:40.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Jake Holliday | 11 | Retford | 7:45.00 |
| 2 | 7 | Lily Pashley | 11 | Retford | 6:44.65 |
| 3 | 9 | Mia Richards | 13 | Retford | 6:07.40 |
| 4 | 8 | Ava Pashley | 13 | Retford | 6:35.35 |
| 5 | 6 | Noah Dewsnap | 11 | Retford | 7:44.00 |
| 6 | 4 | Isla Richards | 10 | Retford | 7:50.70 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Isobelle Rafferty | 11 | Retford | 5:43.40 |
| 2 | 13 | Emily Webb | 13 | Retford | 5:26.00 |
| 3 | 15 | Owen Rafferty | 14 | Retford | 5:05.10 |
| 4 | 14 | Imogen Howitt | 10 | Retford | 5:20.90 |
| 5 | 12 | Iona Watson | 13 | Retford | 5:27.90 |
| 6 | 10 | Isla Stockley | 10 | Retford | 5:59.00 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Harry Brancham | 16 | Retford | 4:50.44 |
| 2 | 19 | Malachy McGuinness | 19 | Retford | 4:34.50 |
| 3 | 21 | Cillian McGuinness | 17 | Retford | 4:14.46 |
| 4 | 20 | Amelia Stevenson | 17 | Retford | 4:29.89 |
| 5 | 18 | Seth Hinitt | 16 | Retford | 4:38.70 |
| 6 | 16 | Neve Ping | 14 | Retford | 4:50.50 |