EVENT 103 Open/Male 09 /Over 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Louis WRIGHT | 12 | Grantham | |
| 2 | 2 | Adam AWAD | 9 | Boston | 2:30.88 |
| 3 | 3 | Charlie NAYLOR | 9 | Sherwood | 1:55.24 |
| 4 | 4 | Cyril BAO | 10 | Grantham | 1:48.50 |
| 5 | 5 | Timas LAURINAVICIUS | 12 | Newark | 1:48.00 |
| 6 | 6 | Benjamin SHEARN | 12 | Grantham | 1:44.95 |
| 7 | 7 | Haiden IP | 13 | Newark | 1:34.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 8 | Derrin BROCKLEBANK | 12 | Grantham | 1:30.71 |
| 2 | 9 | Freddie HIRST | 11 | Grantham | 1:26.63 |
| 3 | 10 | Thomas KINNEAR | 14 | Grantham | 1:24.12 |
| 4 | 11 | James FORGIONE | 12 | Newark | 1:22.00 |
| 5 | 12 | Joshua KIM | 13 | Grantham | 1:17.25 |
| 6 | 13 | Jimmin BAO | 13 | Grantham | 1:16.59 |
| 7 | 14 | Toby EDMONDSON | 11 | Grantham | 1:15.55 |
| 8 | 15 | Yu Ching (Eugene) CHEU | 14 | Grantham | 1:14.87 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Markas PARAPIJONAVICIU | 12 | Grantham | 1:12.90 |
| 2 | 19 | Leo BARNETT | 14 | Grantham | 1:11.07 |
| 3 | 21 | Luke DAYBELL | 16 | Grantham | 1:02.86 |
| 4 | 23 | Ryan NORTON | 18 | Boston | 1:01.95 |
| 5 | 22 | Robbie DUFF | 15 | Lincoln Vulc | 1:02.80 |
| 6 | 20 | Thomas HILLSON | 13 | Grantham | 1:09.51 |
| 7 | 18 | Ethan HUNTER | 15 | Lincoln Vulc | 1:11.73 |
| 8 | 16 | Logan BATES | 13 | Sherwood | 1:13.90 |