EVENT 202 Open/Male 200m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | OLIVER WILKINSON | 13 | Co Lincoln P | |
| 3 | 2 | Arthur SAMMUT | 13 | Co Lincoln P | |
| 4 | 3 | Hoby CARR | 13 | Co Lincoln P | |
| 5 | 4 | Freddie HIRST | 11 | Grantham | |
| 6 | 5 | Finley WEST | 14 | Co Lincoln P | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | William VINTER | 14 | Co Lincoln P | |
| 2 | 7 | Nayan VYAS | 13 | South Lincs | 4:29.72 |
| 3 | 8 | Thomas VERE | 11 | South Lincs | 3:36.56 |
| 4 | 9 | George SHAW | 28 | Deepings | 3:15.00 |
| 5 | 10 | Oliver CLARKE | 12 | Deepings | 3:05.80 |
| 6 | 11 | Leo BARNETT | 13 | Grantham | 3:05.71 |
| 7 | 12 | Joshua KIM | 12 | Grantham | 3:04.60 |
| 8 | 13 | George LEONARD | 13 | Grantham | 3:01.21 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 15 | Toby EDMONDSON | 11 | Grantham | 2:54.20 |
| 2 | 17 | JAMES HUCKLE | 13 | Co Lincoln P | 2:41.54 |
| 3 | 19 | William VERE | 16 | South Lincs | 2:30.79 |
| 4 | 21 | Jacob BRIERS | 17 | Deepings | 2:19.28 |
| 5 | 20 | Oliver SHEPHERD | 16 | Deepings | 2:28.71 |
| 6 | 18 | Matthew TOMPKINSON | 16 | Louth | 2:31.32 |
| 7 | 16 | Thomas HILLSON | 12 | Grantham | 2:44.70 |
| 8 | 14 | Riley-Lee BURFORD | 17 | South Lincs | 2:57.78 |