EVENT 209 Boys 100m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Alex NEVARD | 11 | Grantham | |
| 3 | 2 | M PARAPIJONAVICIUS | 10 | Grantham | |
| 4 | 3 | Ralph NEWTON | 9 | Grantham | |
| 5 | 4 | Daniel GODDARD | 8 | Grantham | |
| 6 | 5 | Austin CHEN-REES | 10 | Grantham | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | William PENNOCK | 9 | Grantham | 2:24.58 |
| 2 | 7 | Toby EDMONDSON | 9 | Grantham | 2:05.74 |
| 3 | 8 | Thomas KINNEAR | 13 | Grantham | 1:52.95 |
| 4 | 9 | Derrin BROCKLEBANK | 9 | Grantham | 1:49.23 |
| 5 | 10 | Benjamin GODDARD | 10 | Grantham | 1:47.67 |
| 6 | 11 | Barnaby DURANT | 10 | Grantham | 1:41.98 |
| 7 | 12 | George LEONARD | 11 | Grantham | 1:41.22 |
| 8 | 13 | Henry DOLAN | 10 | Grantham | 1:38.95 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 14 | Oscar CHEN REES | 11 | Grantham | 1:38.50 |
| 2 | 15 | Elliot GLEAVE | 10 | Grantham | 1:37.24 |
| 3 | 16 | Yu Ching CHEUNG | 12 | Grantham | 1:36.71 |
| 4 | 17 | Thomas HILLSON | 10 | Grantham | 1:34.83 |
| 5 | 18 | A BREARLEY-NEWSOME | 12 | Grantham | 1:31.79 |
| 6 | 19 | Samuel NICHOLS | 11 | Grantham | 1:29.54 |
| 7 | 20 | Theo BACON | 13 | Grantham | 1:29.00 |
| 8 | 21 | Joel SADLER | 12 | Grantham | 1:23.16 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 23 | Ben CARLYLE | 13 | Grantham | 1:19.44 |
| 2 | 26 | Jacob FISH | 14 | Grantham | 1:07.30 |
| 3 | 28 | Owen HATHWAY | 17 | Grantham | 1:05.70 |
| 4 | 30 | James DOBNEY | 19 | Grantham | 1:03.30 |
| 5 | 29 | Joshua CLARKE | 15 | Grantham | 1:04.61 |
| 6 | 27 | Zach HOPKINSON | 14 | Grantham | 1:05.95 |
| 7 | 25 | James NICHOLS | 14 | Grantham | 1:10.94 |
| 8 | 22 | Oscar DURANT | 12 | Grantham | 1:21.64 |