EVENT 103 Open/Male 09 /Over 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Michael Lin | 12 | Middlesboro | |
| 4 | 3 | Aidan Hamel-Smith | 10 | Middlesboro | 1:48.00 |
| 5 | 2 | Oliver Townsend | 11 | Middlesboro | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 5 | Grayson Alderson | 12 | RichmondDale | 1:40.00 |
| 3 | 7 | Harvey Watson | 11 | Middlesboro | 1:36.53 |
| 4 | 9 | Ethan Hall | 15 | Middlesboro | 1:26.61 |
| 5 | 8 | Jacob Money | 13 | Guisborough | 1:35.13 |
| 6 | 6 | Finley Street-Poulsen | 12 | RichmondDale | 1:38.83 |
| 7 | 4 | Owen Harrington | 14 | Loftus Dol | 1:42.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Joe Horner | 11 | Eston | 1:24.01 |
| 2 | 13 | Joe Dumphy-Brook | 10 | Middlesboro | 1:22.60 |
| 3 | 15 | Toby Risebrow | 12 | Loftus Dol | 1:18.70 |
| 4 | 17 | Austin McKenna | 12 | Middlesboro | 1:13.50 |
| 5 | 16 | Stanley Dawson | 13 | Middlesboro | 1:16.60 |
| 6 | 14 | William Colebrook | 15 | Eston | 1:20.85 |
| 7 | 12 | Cameron Codd | 15 | Eston | 1:23.84 |
| 8 | 10 | Sebastian Dalby | 12 | Middlesboro | 1:25.64 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 19 | Jack Waterson | 12 | Middlesboro | 1:12.50 |
| 2 | 21 | Edward Redshaw | 16 | Middlesboro | 1:03.90 |
| 3 | 23 | Owen Reed | 16 | Middlesboro | 1:02.46 |
| 4 | 25 | Oliver Smith | 16 | Middlesboro | 58.90 |
| 5 | 24 | Will Hewitt | 15 | Middlesboro | 1:01.00 |
| 6 | 22 | Ryan Mills | 16 | Middlesboro | 1:02.64 |
| 7 | 20 | P Stephenson-Mangan | 16 | Eston | 1:05.34 |
| 8 | 18 | Shay Downey | 13 | Middlesboro | 1:12.98 |