EVENT 28 Boys Open 100m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Derrin BROCKLEBANK | 9 | Grantham | 2:01.30 |
| 4 | 2 | Finley WEST | 11 | Co Lincoln P | 2:00.68 |
| 5 | 3 | Callum LOYNES | 11 | Co Lincoln P | 2:00.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Woody CLARK | 9 | Grantham | 1:59.05 |
| 2 | 5 | Evan NIXON | 11 | Lincoln Vulc | 1:57.22 |
| 3 | 6 | Henry DOLAN | 9 | Grantham | 1:55.14 |
| 4 | 7 | Thomas KINNEAR | 12 | Grantham | 1:52.81 |
| 5 | 8 | Cole COOPER | 11 | Co Lincoln P | 1:52.03 |
| 6 | 9 | Thomas HILLSON | 9 | Grantham | 1:50.94 |
| 7 | 10 | Ryan BARGH | 10 | Co Lincoln P | 1:50.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Tristan EKE | 12 | Co Lincoln P | 1:49.99 |
| 2 | 12 | George LEONARD | 10 | Grantham | 1:49.11 |
| 3 | 13 | Yu Ching (Eugene) CHEU | 11 | Grantham | 1:47.62 |
| 4 | 14 | Joshua KIM | 10 | Grantham | 1:47.49 |
| 5 | 15 | Oscar CHEN-REES | 10 | Grantham | 1:45.52 |
| 6 | 16 | Michael BUNN | 12 | Lincoln Vulc | 1:44.82 |
| 7 | 17 | Bertie ROSE | 9 | Lincoln Vulc | 1:44.57 |
| 8 | 18 | Oscar WOOD | 10 | Lincoln Vulc | 1:42.09 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 19 | Zachary WILSON | 11 | Lincoln Vulc | 1:41.60 |
| 2 | 20 | Ethan DERBY | 12 | Lincoln Vulc | 1:40.96 |
| 3 | 21 | Bobby WALLIS | 10 | Co Lincoln P | 1:40.51 |
| 4 | 22 | Arlo HAMER | 10 | Co Lincoln P | 1:39.00 |
| 5 | 23 | Stanley THURLOW | 10 | Lincoln Vulc | 1:38.26 |
| 6 | 24 | Elliot GLEAVE | 10 | Grantham | 1:37.51 |
| 7 | 25 | Dan PALMER | 10 | Co Lincoln P | 1:34.71 |
| 8 | 26 | Alfie HAIGH | 14 | Grantham | 1:33.85 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 27 | C SINCLAIR-GRZESKO | 14 | Lincoln Vulc | 1:32.59 |
| 2 | 28 | Connor SMITH | 12 | Grantham | 1:32.31 |
| 3 | 29 | Isaac GREENSLADE | 13 | Lincoln Vulc | 1:31.89 |
| 4 | 30 | Samuel NICHOLS | 11 | Grantham | 1:29.54 |
| 5 | 31 | Joel SADLER | 12 | Grantham | 1:28.64 |
| 6 | 32 | Oliver CLARKE | 10 | Deepings | 1:28.41 |
| 7 | 33 | Oliver WILKINSON | 10 | Lincoln Vulc | 1:28.00 |
| 8 | 34 | Themba LUNGU | 13 | Lincoln Vulc | 1:26.00 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 35 | Jack BELL | 14 | Deepings | 1:24.48 |
| 2 | 36 | Oliver SHEPHERD | 13 | Deepings | 1:23.88 |
| 3 | 37 | Archie FRENCH | 13 | Lincoln Vulc | 1:22.73 |
| 4 | 38 | Riley HAMER | 12 | Co Lincoln P | 1:22.13 |
| 5 | 39 | Jack HICKS | 13 | Lincoln Vulc | 1:20.33 |
| 6 | 40 | Ryan SMITH | 13 | Grantham | 1:19.44 |
| 7 | 41 | Ben CARLYLE | 13 | Grantham | 1:19.44 |
| 8 | 42 | Lewis TARVER | 14 | Deepings | 1:19.00 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 43 | Oliver GARNER | 13 | Co Lincoln P | 1:18.75 |
| 2 | 44 | Harry VICKERS | 15 | Lincoln Vulc | 1:18.22 |
| 3 | 45 | Oliver JONES | 14 | Lincoln Vulc | 1:14.45 |
| 4 | 46 | Luke DAYBELL | 13 | Grantham | 1:13.99 |
| 5 | 47 | Freddie TRAGNI | 13 | Co Lincoln P | 1:13.90 |
| 6 | 48 | Harry NEWMAN | 17 | Deepings | 1:13.50 |
| 7 | 49 | Benjamin DERBY | 14 | Lincoln Vulc | 1:13.33 |
| 8 | 50 | Lucas NEWBOULT | 13 | Lincoln Vulc | 1:12.85 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 52 | Jack HUGHES | 15 | Lincoln Vulc | 1:10.00 |
| 2 | 54 | Christian O'MALLEY | 16 | Lincoln Vulc | 1:07.70 |
| 3 | 56 | Thomas HEPPLESTONE | 17 | Co Lincoln P | 1:05.95 |
| 4 | 58 | Stuart HAMER | 48 | Co Lincoln P | 1:03.90 |
| 5 | 57 | Jamie GREEN | 18 | Co Lincoln P | 1:04.00 |
| 6 | 55 | Harry KINGSTON | 18 | Co Lincoln P | 1:06.00 |
| 7 | 53 | Aidan FITZGIBBON | 15 | Co Lincoln P | 1:09.93 |
| 8 | 51 | Jacob BRIERS | 15 | Deepings | 1:10.09 |