EVENT 204 Open/Male 09/Over 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 2 | Daniel GODDARD | 9 | Grantham | 2:49.18 |
| 2 | 4 | Cameron JAMISON | 9 | Lincoln TSA | 2:15.00 |
| 3 | 6 | Ryan BARGH | 11 | Co Lincoln P | 1:57.30 |
| 4 | 8 | George LEONARD | 11 | Grantham | 1:50.40 |
| 5 | 7 | Elliot GLEAVE | 11 | Grantham | 1:54.34 |
| 6 | 5 | Louis WRIGHT | 10 | Grantham | 2:00.00 |
| 7 | 3 | Henry STEELE | 10 | South Lincs | 2:22.60 |
| 8 | 1 | Chance BURFORD | 9 | Boston | 3:00.88 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 10 | Kai HILAROWICZ | 10 | Co Lincoln P | 1:49.18 |
| 2 | 12 | Matthew ROBERTS | 12 | Co Lincoln P | 1:44.76 |
| 3 | 14 | Callum LOYNES | 11 | Co Lincoln P | 1:43.42 |
| 4 | 16 | John BOOR | 18 | South Lincs | 1:40.06 |
| 5 | 15 | Alfie HAIGH | 14 | Grantham | 1:40.17 |
| 6 | 13 | Bobby WALLIS | 11 | Co Lincoln P | 1:44.31 |
| 7 | 11 | Derrin BROCKLEBANK | 10 | Grantham | 1:46.27 |
| 8 | 9 | Benjamin GODDARD | 11 | Grantham | 1:49.50 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Henry DOLAN | 10 | Grantham | 1:38.48 |
| 2 | 20 | Morgan GRIFFIN | 13 | South Lincs | 1:37.70 |
| 3 | 22 | Reuben OWEN | 13 | South Lincs | 1:35.75 |
| 4 | 24 | Oliver CLARKE | 11 | Deepings | 1:28.87 |
| 5 | 23 | Oliver WILKINSON | 11 | Lincoln Vulc | 1:30.38 |
| 6 | 21 | Corey HESELTINE | 12 | Retford | 1:36.98 |
| 7 | 19 | Elliot MCWHIRTER | 14 | Lincoln TSA | 1:37.71 |
| 8 | 17 | Emilijus BINKIS | 12 | South Lincs | 1:39.38 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 26 | Noah SKINNER | 13 | Deepings | 1:27.20 |
| 2 | 28 | Anas LACHHEB | 14 | South Lincs | 1:24.25 |
| 3 | 30 | Freddie TRAGNI | 14 | Co Lincoln P | 1:18.45 |
| 4 | 32 | Morgan FARRAR | 14 | Co Lincoln P | 1:13.32 |
| 5 | 31 | Jacob BRIERS | 15 | Deepings | 1:15.53 |
| 6 | 29 | Charlie WARD | 13 | South Lincs | 1:23.89 |
| 7 | 27 | James CASH | 13 | Deepings | 1:26.60 |
| 8 | 25 | Joel SADLER | 13 | Grantham | 1:28.70 |