EVENT 117 Boys 16/17 Yrs 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 1 | William March | 02 | Bedfordshire | 1:01.62 |
| 2 | 3 | Robert Brittle | 02 | Cornwall | 1:00.58 |
| 3 | 5 | Louis Choron | 02 | Sussex | 59.71 |
| 4 | 7 | Alex Bryant | 02 | Dorset | 58.85 |
| 5 | 6 | Thomas Beamer | 02 | Leics | 59.05 |
| 6 | 4 | Tom Adams | 02 | Lincolnshire | 59.88 |
| 7 | 2 | Alexander Hindle | 02 | Warwicks | 1:01.01 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 0 | 9 | Marcus Scullion | 03 | Hampshire | 58.50 |
| 1 | 11 | Finn Nicholl | 02 | Staffs | 58.21 |
| 2 | 13 | Herbie Kinder | 02 | Cambs | 58.11 |
| 3 | 15 | Samuel Greenbank | 03 | Cumbria | 57.73 |
| 4 | 17 | Rhys Edwards | 02 | Swim Wales W | 55.97 |
| 5 | 16 | Patrick Heeks | 03 | Worcs | 57.63 |
| 6 | 14 | Cameron Lewis | 02 | Gloucs | 57.83 |
| 7 | 12 | Nathan Woodrow | 03 | Norfolk | 58.18 |
| 8 | 10 | Devesh Kapoor | 03 | SE Herts | 58.43 |
| 9 | 8 | Alexander Sharman | 02 | Wiltshire | 58.75 |