EVENT 201 Open/Male 09 Yrs/Over 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Elliot GLEAVE | 13 | Grantham | |
| 4 | 2 | William PENNOCK | 12 | Grantham | 6:55.26 |
| 5 | 3 | Freddie HIRST | 12 | Grantham | 6:45.58 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Louis WRIGHT | 13 | Grantham | 6:42.42 |
| 2 | 5 | Thomas KINNEAR | 15 | Grantham | 6:35.48 |
| 3 | 6 | Derrin BROCKLEBANK | 12 | Grantham | 6:15.66 |
| 4 | 7 | Joshua KIM | 14 | Grantham | 6:13.31 |
| 5 | 8 | Jimmin BAO | 13 | Grantham | 5:58.52 |
| 6 | 9 | Yu Ching (Eugene) CHEU | 15 | Grantham | 5:55.58 |
| 7 | 10 | Toby EDMONDSON | 12 | Grantham | 5:51.17 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 12 | Thomas HILLSON | 13 | Grantham | 5:38.12 |
| 2 | 14 | George LEONARD | 14 | Grantham | 5:33.70 |
| 3 | 16 | Ben CARLYLE | 16 | Grantham | 4:55.40 |
| 4 | 18 | James DOBNEY | 22 | Grantham | 4:44.57 |
| 5 | 17 | Zach HOPKINSON | 17 | Grantham | 4:45.94 |
| 6 | 15 | Francesco MONACO | 14 | Grantham | 5:04.99 |
| 7 | 13 | Markas PARAPIJONAVICIU | 13 | Grantham | 5:34.54 |
| 8 | 11 | Henry DOLAN | 13 | Grantham | 5:48.63 |