EVENT 108 Open/Male 16/17 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | William Diable | 16 | Shropshire | 1:03.04 |
| 2 | 3 | Nathan Close | 17 | Bedfordshire | 1:02.56 |
| 3 | 5 | Ethan Gough | 17 | Wiltshire | 1:01.75 |
| 4 | 7 | Ryan Wall | 16 | Cambs | 59.99 |
| 5 | 6 | Menuka Jayakody | 17 | Norfolk | 1:00.62 |
| 6 | 4 | Joseph Parnell | 16 | Lincolnshire | 1:02.25 |
| 7 | 2 | Joshua Leigh | 17 | Cornwall | 1:02.88 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 9 | Adam Frazer | 17 | Northants | 59.79 |
| 1 | 11 | Edgar Stepliuk | 17 | Ox & N Bucks | 59.25 |
| 2 | 13 | Finlay John | 17 | SW Wales | 58.47 |
| 3 | 15 | Lucas Brown | 17 | Scot North | 57.49 |
| 4 | 17 | Charlie Meek | 17 | Dorset | 56.71 |
| 5 | 16 | Jacob Mills | 16 | Leics | 57.27 |
| 6 | 14 | Zachariah Dale | 16 | Staffs | 58.45 |
| 7 | 12 | Davey Unwin | 17 | Cheshire | 58.52 |
| 8 | 10 | Ethan Allpress | 17 | Cumbria | 59.50 |
| 9 | 8 | Daniel Fielder | 17 | Gloucs | 59.84 |