EVENT 305 Open/Male 09 /Over 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Alfie BUTT | 10 | Louth | |
| 2 | 2 | Alfie HESLETINE | 10 | Retford | 2:00.00 |
| 3 | 3 | Owen ZHANG | 12 | Gainsborough | 1:57.43 |
| 4 | 4 | Hayden FIELDS | 17 | Lincoln TSA | 1:45.00 |
| 5 | 5 | Cameron JAMISON | 9 | Lincoln TSA | 1:35.35 |
| 6 | 6 | Freddie HIRST | 10 | Grantham | 1:33.95 |
| 7 | 7 | George LEONARD | 12 | Grantham | 1:33.67 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 9 | Oscar HE | 11 | Gainsborough | 1:32.80 |
| 2 | 10 | Leo BARNETT | 12 | Grantham | 1:32.47 |
| 3 | 11 | Benjamin TETLAW | 15 | Newark | 1:32.47 |
| 4 | 12 | Derrin BROCKLEBANK | 10 | Grantham | 1:32.45 |
| 5 | 13 | Albert HAILE | 12 | Louth | 1:31.16 |
| 6 | 14 | Elliot GLEAVE | 11 | Grantham | 1:29.10 |
| 7 | 15 | Henry WILLERTON | 11 | Skegness | 1:27.76 |
| 8 | 16 | Ryan BARGH | 12 | Co Lincoln P | 1:27.30 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Harry BEASTALL | 13 | Co Lincoln P | 1:26.48 |
| 2 | 18 | Logan BATES | 11 | Hucknall | 1:24.75 |
| 3 | 19 | Thomas HILLSON | 11 | Grantham | 1:24.38 |
| 4 | 20 | Freddie PRICE | 12 | Louth | 1:22.68 |
| 5 | 21 | Alfie HAIGH | 15 | Grantham | 1:18.21 |
| 6 | 22 | Rian SOUTHWOOD | 13 | Louth | 1:16.44 |
| 7 | 23 | Henry DAVIES | 13 | Hucknall | 1:16.23 |
| 8 | 24 | Oliver THOMPSON | 14 | Louth | 1:14.99 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 26 | Luke DAYBELL | 15 | Grantham | 1:10.09 |
| 2 | 28 | Chris WILLERTON | 40 | Skegness | 1:09.06 |
| 3 | 30 | Ben CARLYLE | 14 | Grantham | 1:05.68 |
| 4 | 32 | Layton ANNISON-SNOWDEN | 15 | Louth | 1:04.24 |
| 5 | 31 | Leon BAILEY | 18 | Louth | 1:05.21 |
| 6 | 29 | Matthew TOMPKINSON | 15 | Louth | 1:08.31 |
| 7 | 27 | Henry MASON-SMITH | 13 | Louth | 1:09.53 |
| 8 | 25 | Joshua HANKS | 14 | Louth | 1:14.32 |