EVENT 303 Boys 200m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Oscar CHEN REES | 11 | Grantham | |
| 2 | 2 | Woody CLARK | 9 | Grantham | |
| 3 | 3 | Henry DOLAN | 10 | Grantham | |
| 4 | 4 | Freddie HIRST | 9 | Grantham | |
| 5 | 5 | Thomas KINNEAR | 13 | Grantham | 4:09.32 |
| 6 | 6 | Barnaby DURANT | 10 | Grantham | 3:47.45 |
| 7 | 7 | Joshua KIM | 11 | Grantham | 3:41.50 |
| 8 | 8 | Yu Ching CHEUNG | 12 | Grantham | 3:36.39 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 9 | Elliot GLEAVE | 10 | Grantham | 3:35.71 |
| 2 | 10 | George LEONARD | 11 | Grantham | 3:30.99 |
| 3 | 11 | Thomas HILLSON | 10 | Grantham | 3:25.20 |
| 4 | 12 | Alfie HAIGH | 14 | Grantham | 3:24.02 |
| 5 | 13 | Joel SADLER | 12 | Grantham | 3:14.49 |
| 6 | 14 | Theo BACON | 13 | Grantham | 3:10.40 |
| 7 | 15 | Samuel NICHOLS | 11 | Grantham | 3:09.62 |
| 8 | 16 | Fabian KOLASA | 12 | Grantham | 3:07.71 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Ben CARLYLE | 13 | Grantham | 2:56.76 |
| 2 | 20 | James NICHOLS | 14 | Grantham | 2:36.51 |
| 3 | 22 | Zach HOPKINSON | 14 | Grantham | 2:27.22 |
| 4 | 24 | Owen HATHWAY | 17 | Grantham | 2:22.39 |
| 5 | 23 | Jacob FISH | 14 | Grantham | 2:23.60 |
| 6 | 21 | Daniel DEGNAN | 15 | Grantham | 2:32.83 |
| 7 | 19 | Luke DAYBELL | 14 | Grantham | 2:37.32 |
| 8 | 17 | Oscar DURANT | 12 | Grantham | 3:04.18 |