EVENT 404 Open/Male 09 /Over 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Freddie PRICE | 12 | Louth | |
| 3 | 2 | Hayden FIELDS | 17 | Lincoln TSA | 1:35.00 |
| 4 | 3 | Henry DOLAN | 11 | Grantham | 1:34.39 |
| 5 | 4 | Leo BARNETT | 12 | Grantham | 1:32.07 |
| 6 | 5 | Albert HAILE | 12 | Louth | 1:32.04 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 7 | Logan BATES | 11 | Hucknall | 1:24.94 |
| 2 | 9 | Henry DAVIES | 13 | Hucknall | 1:20.06 |
| 3 | 12 | Ben CARLYLE | 14 | Grantham | 1:09.50 |
| 4 | 14 | Layton ANNISON-SNOWDEN | 15 | Louth | 1:07.12 |
| 5 | 13 | Chris WILLERTON | 40 | Skegness | 1:08.98 |
| 6 | 10 | Rian SOUTHWOOD | 13 | Louth | 1:15.60 |
| 7 | 8 | Thomas HILLSON | 11 | Grantham | 1:20.43 |
| 8 | 6 | Yu Ching (Eugene) CHEU | 13 | Grantham | 1:29.65 |