EVENT 103 Open/Male 09 /Over 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 2 | Ethan LUCY | 9 | South Lincs | 1:54.08 |
| 3 | 4 | Henry DOLAN | 10 | Grantham | 1:47.70 |
| 4 | 6 | Freddie HIRST | 9 | Grantham | 1:40.61 |
| 5 | 5 | Emilijus BINKIS | 12 | South Lincs | 1:45.27 |
| 6 | 3 | Derrin BROCKLEBANK | 10 | Grantham | 1:47.84 |
| 7 | 1 | Chance BURFORD | 9 | Boston | 2:01.18 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 8 | Toby EDMONDSON | 9 | Grantham | 1:40.00 |
| 2 | 10 | Ryan BARGH | 11 | Co Lincoln P | 1:34.04 |
| 3 | 12 | Stanley THURLOW | 11 | Lincoln Vulc | 1:32.00 |
| 4 | 14 | Bobby WALLIS | 11 | Co Lincoln P | 1:27.30 |
| 5 | 13 | Elliot GLEAVE | 11 | Grantham | 1:31.16 |
| 6 | 11 | Finley WEST | 12 | Co Lincoln P | 1:32.05 |
| 7 | 9 | Patrick ADEJUWON | 12 | South Lincs | 1:38.44 |
| 8 | 7 | George LEONARD | 11 | Grantham | 1:40.60 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 16 | Thomas HILLSON | 10 | Grantham | 1:24.38 |
| 2 | 18 | Noah SKINNER | 13 | Deepings | 1:18.28 |
| 3 | 20 | Oliver JONES | 15 | Lincoln Vulc | 1:12.21 |
| 4 | 22 | Evan NOORPURI | 16 | Lincoln Vulc | 1:06.02 |
| 5 | 21 | Jack HICKS | 14 | Lincoln Vulc | 1:10.25 |
| 6 | 19 | James CASH | 13 | Deepings | 1:12.38 |
| 7 | 17 | Oliver WILKINSON | 11 | Lincoln Vulc | 1:18.93 |
| 8 | 15 | Corey HESELTINE | 12 | Retford | 1:25.90 |