EVENT 308 Boy 07 Yrs/Over 200m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | JACK REYNOLDS | 11 | Grantham | |
| 2 | 2 | GEORGE SHAW | 24 | Deepings | |
| 3 | 3 | ASHTON HUNTER | 9 | Deepings | |
| 4 | 4 | JACK CRADOCK | 13 | Deepings | 4:01.00 |
| 5 | 5 | WILLIAM BURDOCK | 12 | Deepings | 3:53.62 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | ADRIAN ELERTS | 11 | Grantham | 3:44.13 |
| 2 | 7 | JACK BELL | 12 | Deepings | 3:23.12 |
| 3 | 8 | ZACH HOPKINSON | 12 | Grantham | 3:11.26 |
| 4 | 9 | DANIEL DEGNAN | 13 | Grantham | 3:06.20 |
| 5 | 10 | JAMES NICHOLS | 12 | Grantham | 3:02.60 |
| 6 | 11 | JACOB FISH | 12 | Grantham | 2:46.26 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 13 | ELIJAH HALLIDAY | 14 | Grantham | 2:33.19 |
| 2 | 15 | SAMUEL LEVERIDGE | 15 | Grantham | 2:21.85 |
| 3 | 17 | JAMES DOBNEY | 17 | Grantham | 2:17.79 |
| 4 | 16 | HARRY CARDELL | 17 | Deepings | 2:20.63 |
| 5 | 14 | OWEN HATHWAY | 15 | Grantham | 2:32.77 |
| 6 | 12 | JACOB BRIERS | 13 | Deepings | 2:44.49 |