EVENT 101 Open/Male 09/Over 100m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 2 | Coen RUCK | 10 | Louth | 2:20.00 |
| 2 | 4 | Spencer CROSS | 9 | Melton M'bry | 2:05.00 |
| 3 | 6 | Gregory CROSS | 10 | Melton M'bry | 1:58.64 |
| 4 | 8 | Joseph WRIGHT | 10 | Gainsborough | 1:54.00 |
| 5 | 7 | Benjamin SHEARN | 10 | Grantham | 1:54.38 |
| 6 | 5 | Henry EVANS | 10 | Louth | 2:03.82 |
| 7 | 3 | Jayden GOWLING | 12 | Skegness | 2:18.63 |
| 8 | 1 | Cooper SPRING | 12 | Boston | 2:45.99 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 10 | Damir IVANOVS | 9 | Boston | 1:50.23 |
| 2 | 12 | Dylan MACKIE | 12 | March | 1:49.75 |
| 3 | 14 | Thomas KINNEAR | 12 | Grantham | 1:47.32 |
| 4 | 16 | Ali ASHRAF | 14 | Boston | 1:43.89 |
| 5 | 15 | James RICHARDSON | 12 | Louth | 1:45.00 |
| 6 | 13 | Benjamin TETLAW | 14 | Newark | 1:48.91 |
| 7 | 11 | Jamie BEACOM | 12 | March | 1:49.89 |
| 8 | 9 | Noah REDWOOD-MOORE | 11 | Melton M'bry | 1:50.61 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Markas PARAPIJONAVICIU | 10 | Grantham | 1:42.62 |
| 2 | 20 | Freddie HIRST | 9 | Grantham | 1:40.23 |
| 3 | 22 | Oliver TEE | 14 | Melton M'bry | 1:37.91 |
| 4 | 24 | Derrin BROCKLEBANK | 10 | Grantham | 1:34.18 |
| 5 | 23 | Albert HAILE | 12 | Louth | 1:37.89 |
| 6 | 21 | Jacob URE | 12 | March | 1:38.96 |
| 7 | 19 | Matt HALL | 13 | March | 1:42.29 |
| 8 | 17 | Zachary LAWRENCE | 11 | Louth | 1:42.89 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 26 | Elliot GLEAVE | 11 | Grantham | 1:33.21 |
| 2 | 28 | Henry DOLAN | 10 | Grantham | 1:30.88 |
| 3 | 30 | Mason RILEY | 13 | March | 1:26.86 |
| 4 | 32 | Alfie BLADES | 13 | Gainsborough | 1:25.92 |
| 5 | 31 | Fabian KOLASA | 13 | Grantham | 1:26.15 |
| 6 | 29 | Thomas HILLSON | 11 | Grantham | 1:28.59 |
| 7 | 27 | Toby EDMONDSON | 9 | Grantham | 1:32.96 |
| 8 | 25 | Eugene CHEUNG | 12 | Grantham | 1:33.75 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 34 | Daniel PEARSON | 35 | Boston | 1:25.26 |
| 2 | 36 | Freddie PRICE | 12 | Louth | 1:23.84 |
| 3 | 38 | Joel SADLER | 13 | Grantham | 1:21.16 |
| 4 | 40 | Jack HATCH | 14 | Gainsborough | 1:18.27 |
| 5 | 39 | Harry RICKARD | 13 | March | 1:20.85 |
| 6 | 37 | Ant HALL | 15 | March | 1:22.95 |
| 7 | 35 | Joshua GILL | 20 | Gainsborough | 1:24.19 |
| 8 | 33 | Loui MAYNE | 13 | Melton M'bry | 1:25.76 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 42 | Luke DAYBELL | 14 | Grantham | 1:13.05 |
| 2 | 44 | Leo GARRISON | 17 | Gainsborough | 1:12.65 |
| 3 | 46 | Daniel DEGNAN | 15 | Grantham | 1:07.74 |
| 4 | 48 | Ryan NORTON | 16 | Boston | 1:05.21 |
| 5 | 47 | Zach HOPKINSON | 15 | Grantham | 1:05.70 |
| 6 | 45 | Adam FOUND | 27 | Grantham | 1:09.36 |
| 7 | 43 | Ben CARLYLE | 14 | Grantham | 1:12.77 |
| 8 | 41 | James THOMAS | 14 | Gainsborough | 1:15.54 |