EVENT 33 Boys Open 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Ted MOORE | 10 | Grantham | 2:40.00 |
| 4 | 2 | Lucas GOODWIN | 12 | Lincoln Vulc | 2:18.19 |
| 5 | 3 | Kai HILAROWICZ | 10 | Lincoln Vulc | 2:15.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Fraser REID | 13 | Deepings | 2:15.00 |
| 2 | 5 | Woody CLARK | 9 | Grantham | 2:14.23 |
| 3 | 6 | Barnaby DURANT | 9 | Grantham | 2:12.90 |
| 4 | 7 | Ryan BARGH | 10 | Co Lincoln P | 2:12.00 |
| 5 | 8 | Jasper REID | 13 | Deepings | 2:10.00 |
| 6 | 9 | Thomas HILLSON | 9 | Grantham | 2:07.90 |
| 7 | 10 | Henry DOLAN | 9 | Grantham | 2:07.07 |
| 8 | 11 | Dan PALMER | 10 | Co Lincoln P | 2:00.60 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 12 | Thomas KINNEAR | 12 | Grantham | 2:00.00 |
| 2 | 13 | Callum LOYNES | 11 | Co Lincoln P | 2:00.00 |
| 3 | 14 | Bobby WALLIS | 10 | Co Lincoln P | 1:57.84 |
| 4 | 15 | Oscar WOOD | 10 | Lincoln Vulc | 1:56.40 |
| 5 | 16 | Tristan EKE | 12 | Co Lincoln P | 1:55.79 |
| 6 | 17 | Elliot GLEAVE | 10 | Grantham | 1:55.42 |
| 7 | 18 | C SINCLAIR-GRZESKO | 14 | Lincoln Vulc | 1:55.26 |
| 8 | 19 | Finley WEST | 11 | Co Lincoln P | 1:54.47 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 20 | George LEONARD | 10 | Grantham | 1:53.29 |
| 2 | 21 | Arthur BREARLEY-NEWSOM | 12 | Grantham | 1:47.76 |
| 3 | 22 | Aiden HUNTLEY | 11 | Co Lincoln P | 1:47.49 |
| 4 | 23 | Alfie HAIGH | 14 | Grantham | 1:46.78 |
| 5 | 24 | Jacob HEGG | 13 | Lincoln Vulc | 1:45.40 |
| 6 | 25 | Oliver WILKINSON | 10 | Lincoln Vulc | 1:45.25 |
| 7 | 26 | Ben CARLYLE | 13 | Grantham | 1:44.72 |
| 8 | 27 | Ryan SMITH | 13 | Grantham | 1:44.72 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 28 | Noah SKINNER | 12 | Deepings | 1:44.08 |
| 2 | 29 | Fabian KOLASA | 12 | Grantham | 1:43.68 |
| 3 | 30 | Joel SADLER | 12 | Grantham | 1:40.09 |
| 4 | 31 | Theo BACON | 12 | Grantham | 1:39.96 |
| 5 | 32 | Oliver CLARKE | 10 | Deepings | 1:39.75 |
| 6 | 33 | Samuel NICHOLS | 11 | Grantham | 1:37.61 |
| 7 | 34 | Riley HAMER | 12 | Co Lincoln P | 1:36.45 |
| 8 | 35 | Cole COOPER | 11 | Co Lincoln P | 1:35.60 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 36 | Isaac GREENSLADE | 13 | Lincoln Vulc | 1:34.59 |
| 2 | 37 | Harry VICKERS | 15 | Lincoln Vulc | 1:30.25 |
| 3 | 38 | Oliver GARNER | 13 | Co Lincoln P | 1:30.20 |
| 4 | 39 | Joshua CLARKE | 15 | Grantham | 1:29.08 |
| 5 | 40 | Lewis TARVER | 14 | Deepings | 1:28.06 |
| 6 | 41 | Lucas NEWBOULT | 13 | Lincoln Vulc | 1:26.93 |
| 7 | 42 | Archie FRENCH | 13 | Lincoln Vulc | 1:23.41 |
| 8 | 43 | Joshua CRAVEN | 16 | Co Lincoln P | 1:23.21 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 45 | Freddie TRAGNI | 13 | Co Lincoln P | 1:20.38 |
| 2 | 47 | Jacob BRIERS | 15 | Deepings | 1:15.53 |
| 3 | 49 | Jack ZERAVICA | 15 | Grantham | 1:14.37 |
| 4 | 51 | Stuart HAMER | 48 | Co Lincoln P | 1:09.21 |
| 5 | 50 | Jamie GREEN | 18 | Co Lincoln P | 1:13.19 |
| 6 | 48 | Jack HUGHES | 15 | Lincoln Vulc | 1:15.50 |
| 7 | 46 | Aidan FITZGIBBON | 15 | Co Lincoln P | 1:16.25 |
| 8 | 44 | Daniel DEGNAN | 14 | Grantham | 1:21.36 |