EVENT 113 Girls 16/17 Yrs 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 2 | Jasmine Iley | 17 | Essex | 1:06.10 |
| 1 | 4 | Holly White | 16 | Lancashire | 1:05.13 |
| 2 | 6 | Eve Goddard-Smith | 17 | Swim Wales W | 1:03.33 |
| 3 | 8 | Emily Ford | 16 | Ox & N Bucks | 1:03.08 |
| 4 | 10 | Lauren Brantley | 16 | Middlesex | 1:02.92 |
| 5 | 9 | Mia Leech | 16 | Cambs | 1:03.02 |
| 6 | 7 | Amie Philpot | 16 | Suffolk | 1:03.26 |
| 7 | 5 | Isobel Hume | 16 | Northants | 1:05.10 |
| 8 | 3 | Tilly Hansen-Hamilton | 16 | Surrey | 1:05.40 |
| 9 | 1 | Charlotte Robb | 17 | Leics | 1:08.80 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 12 | Serena Iheagwaram | 16 | Scot West | 1:02.68 |
| 1 | 14 | Daisy Anderson | 17 | Kent | 1:02.22 |
| 2 | 16 | Kaylee Dekker | 16 | Devon | 1:00.84 |
| 3 | 18 | Ciara Schlosshan | 17 | Yorkshire | 1:00.16 |
| 4 | 20 | Emily Large | 17 | N & Durham | 58.97 |
| 5 | 19 | Keanna Macinnes | 17 | Scot East | 59.55 |
| 6 | 17 | Jasmine McCrea | 17 | Dorset | 1:00.64 |
| 7 | 15 | Megan Allison | 16 | Swim Wales E | 1:02.01 |
| 8 | 13 | Eleanor Cowan | 16 | Berks&SBucks | 1:02.62 |
| 9 | 11 | Jessica Podger | 17 | Somerset | 1:02.69 |