EVENT 505 Boy Open 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 2 | Edward ROSE | 9 | Rotherham Mo | 1:51.00 |
| 2 | 4 | Finlay SMITH | 13 | Deepings | 1:44.30 |
| 3 | 6 | Harry DENWOOD | 11 | Rotherham Mo | 1:43.90 |
| 4 | 5 | Harry ASTON | 13 | Derventio | 1:43.93 |
| 5 | 3 | Reuben MEADOWS | 11 | Bassetlaw SS | 1:50.21 |
| 6 | 1 | Aden VAN HOOREBEEK | 10 | Eckington | 1:55.70 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 8 | William BURDOCK | 12 | Deepings | 1:38.90 |
| 2 | 10 | Harry HASLAM | 14 | Bircotes SC | 1:35.00 |
| 3 | 12 | Harrison CLARK | 12 | Bassetlaw SS | 1:28.21 |
| 4 | 11 | Joshua DAY | 13 | Eckington | 1:31.48 |
| 5 | 9 | C BUTTERELL-QUANBROUGH | 11 | Bassetlaw SS | 1:35.31 |
| 6 | 7 | Thomas COLLINS | 11 | Bassetlaw SS | 1:39.03 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 14 | Charlie WHEELER-KAYE | 12 | Bassetlaw SS | 1:20.86 |
| 2 | 16 | Noah VAN HOOREBEEK | 14 | Eckington | 1:20.51 |
| 3 | 18 | Oliver WILLIS | 14 | Bircotes SC | 1:20.00 |
| 4 | 17 | Zac OAKES | 17 | Newcastle St | 1:20.14 |
| 5 | 15 | Liam LYONS | 12 | Derventio | 1:20.63 |
| 6 | 13 | Oscar GAVELLE | 12 | Rotherham Mo | 1:23.07 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 20 | Ollie TRANMER | 13 | Rotherham Mo | 1:18.14 |
| 2 | 22 | Layne KEYWORTH | 13 | Bassetlaw SS | 1:16.40 |
| 3 | 24 | Bowan GOMERSALL | 12 | Rotherham Mo | 1:15.37 |
| 4 | 23 | Jake ASKIN | 17 | Bircotes SC | 1:15.59 |
| 5 | 21 | Samuel O'REILLY-SMITH | 14 | Newcastle St | 1:16.72 |
| 6 | 19 | Lucas KIMBER | 12 | Derventio | 1:18.67 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 26 | Matthew WALKER | 15 | Newcastle St | 1:13.70 |
| 2 | 28 | Seth HINITT | 15 | Bassetlaw SS | 1:12.89 |
| 3 | 30 | Oliver OSBORNE | 14 | Derventio | 1:12.27 |
| 4 | 29 | Guy TINWELL | 16 | Newcastle St | 1:12.81 |
| 5 | 27 | Ross GUNNING | 14 | Newcastle St | 1:13.44 |
| 6 | 25 | Lewis FOX | 15 | Rotherham Mo | 1:15.00 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 32 | Jack DENWOOD | 15 | Rotherham Mo | 1:11.58 |
| 2 | 34 | Niall MAGUIRE | 15 | Newcastle St | 1:11.14 |
| 3 | 36 | Jake HOTHAM | 15 | Matlock | 1:09.82 |
| 4 | 35 | Callum KETTLEWELL | 17 | Bassetlaw SS | 1:11.04 |
| 5 | 33 | Patrick WELSH | 16 | Derventio | 1:11.20 |
| 6 | 31 | Oliver DAVIS-TOOTILL | 13 | Rotherham Mo | 1:11.91 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 38 | Leo ALLANSON | 15 | Derventio | 1:08.23 |
| 2 | 40 | Zachariah DALE | 14 | Newcastle St | 1:05.20 |
| 3 | 42 | Malachy MCGUINNESS | 18 | Bassetlaw SS | 1:00.06 |
| 4 | 41 | Archie HERON | 15 | Derventio | 1:03.62 |
| 5 | 39 | Alexander HARRAND | 16 | Derventio | 1:05.94 |
| 6 | 37 | William DURRANS | 14 | Rotherham Mo | 1:08.40 |