EVENT 35 Open/Male 200m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Sam RHOADES | 13 | Co Lincoln P | 3:45.00 |
| 4 | 2 | Hoby CARR | 13 | Co Lincoln P | 3:40.00 |
| 5 | 3 | Sebastian MADDISON | 13 | Co Lincoln P | 3:40.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Arlo HAMER | 12 | Co Lincoln P | 3:40.00 |
| 2 | 5 | Harry BEASTALL | 13 | Co Lincoln P | 3:40.00 |
| 3 | 6 | Arthur SAMMUT | 12 | Co Lincoln P | 3:30.00 |
| 4 | 7 | Harry MELDRUM | 13 | Co Lincoln P | 3:30.00 |
| 5 | 8 | Thomas KINNEAR | 13 | Grantham | 3:20.61 |
| 6 | 9 | Joshua KIM | 12 | Grantham | 3:14.62 |
| 7 | 10 | Riley HAMER | 14 | Co Lincoln P | 3:10.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 12 | George LEONARD | 12 | Grantham | 3:01.21 |
| 2 | 14 | Gareth MADDISON | 45 | Co Lincoln P | 2:55.00 |
| 3 | 16 | James HUCKLE | 13 | Lincoln Vulc | 2:43.22 |
| 4 | 18 | Ben CARLYLE | 15 | Grantham | 2:24.39 |
| 5 | 17 | Jack HICKS | 15 | Lincoln Vulc | 2:30.88 |
| 6 | 15 | Ethan HUNTER | 14 | Lincoln Vulc | 2:52.00 |
| 7 | 13 | Thomas HILLSON | 11 | Grantham | 2:56.43 |
| 8 | 11 | Leo BARNETT | 13 | Grantham | 3:05.71 |