EVENT 107 Open/Male 09 /Over 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Louis THOMPSON | 10 | Grantham | |
| 2 | 2 | Alex BARTLE | 9 | Boston | 2:22.55 |
| 3 | 3 | Jack REED | 9 | Boston | 2:09.20 |
| 4 | 4 | George BRUMBY | 9 | Gainsborough | 1:50.00 |
| 5 | 5 | Bentley ANTHONY | 12 | March | 1:48.50 |
| 6 | 6 | Henry DOLAN | 11 | Grantham | 1:39.25 |
| 7 | 7 | Jacob STAPLES | 13 | Lincoln Vulc | 1:38.52 |
| 8 | 8 | Damir IVANOVS | 10 | Boston | 1:38.09 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 9 | Spencer CROSS | 10 | Melton M'bry | 1:36.42 |
| 2 | 10 | William PENNOCK | 11 | Grantham | 1:36.12 |
| 3 | 11 | Charlie VENABLES | 12 | March | 1:35.90 |
| 4 | 12 | Benjamin GODDARD | 12 | Grantham | 1:35.37 |
| 5 | 13 | Gregory CROSS | 11 | Melton M'bry | 1:33.42 |
| 6 | 14 | Freddie HIRST | 10 | Grantham | 1:32.25 |
| 7 | 15 | Noah REDWOOD-MOORE | 12 | Melton M'bry | 1:31.68 |
| 8 | 16 | George WOODHEAD | 12 | Gainsborough | 1:31.39 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Dylan HAYLOCK | 11 | March | 1:30.60 |
| 2 | 18 | Derrin BROCKLEBANK | 11 | Grantham | 1:29.42 |
| 3 | 19 | Leo BARNETT | 13 | Grantham | 1:28.22 |
| 4 | 20 | Toby EDMONDSON | 10 | Grantham | 1:24.90 |
| 5 | 21 | Evan NIXON | 13 | Lincoln Vulc | 1:24.54 |
| 6 | 22 | Matthew HALL | 14 | March | 1:24.41 |
| 7 | 23 | Oscar HE | 12 | Gainsborough | 1:24.38 |
| 8 | 24 | Owen ZHANG | 13 | Gainsborough | 1:24.11 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 25 | Elliot GLEAVE | 12 | Grantham | 1:23.14 |
| 2 | 26 | George LEONARD | 12 | Grantham | 1:22.47 |
| 3 | 27 | Thomas HILLSON | 12 | Grantham | 1:19.88 |
| 4 | 28 | Callum LOYNES | 13 | Co Lincoln P | 1:19.28 |
| 5 | 29 | Markas PARAPIJONAVICIU | 11 | Grantham | 1:18.00 |
| 6 | 30 | Ethan DERBY | 14 | Lincoln Vulc | 1:15.31 |
| 7 | 31 | Antony HALL | 16 | March | 1:12.94 |
| 8 | 32 | Jacob URE | 13 | March | 1:11.76 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 34 | Oliver JONES | 16 | Lincoln Vulc | 1:11.57 |
| 2 | 36 | Harry VICKERS | 17 | Lincoln Vulc | 1:08.18 |
| 3 | 38 | Benjamin DERBY | 16 | Lincoln Vulc | 1:05.24 |
| 4 | 40 | Ben CARLYLE | 15 | Grantham | 1:03.20 |
| 5 | 39 | Daniel DEGNAN | 16 | Grantham | 1:04.74 |
| 6 | 37 | Evan NOORPURI | 18 | Lincoln Vulc | 1:05.53 |
| 7 | 35 | James THOMAS | 15 | Gainsborough | 1:11.51 |
| 8 | 33 | Harry RICKARD | 14 | March | 1:11.73 |