EVENT 101 Girls 16/17 Yrs 100m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 2 | Ciara Usher | 16 | Northants | 58.47 |
| 1 | 4 | Aiyana Lawson | 17 | Ox & N Bucks | 58.10 |
| 2 | 6 | Katie Robertson | 17 | Scot West | 57.50 |
| 3 | 8 | Maisie Macartney | 17 | Kent | 57.28 |
| 4 | 10 | Emily Peck | 17 | Lancashire | 57.25 |
| 5 | 9 | Anna Podurgiel | 16 | Middlesex | 57.25 |
| 6 | 7 | Ellie Walker | 17 | Yorkshire | 57.48 |
| 7 | 5 | Roisin Ramsay | 17 | Scot East | 58.10 |
| 8 | 3 | Mackenzie Whyatt | 16 | Cambs | 58.15 |
| 9 | 1 | Lucy Sharp | 17 | Leics | 1:01.98 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 12 | Elena Morgan | 16 | Swim Wales E | 57.23 |
| 1 | 14 | Amy Davies | 16 | Surrey | 57.17 |
| 2 | 16 | Jessica Podger | 17 | Somerset | 56.79 |
| 3 | 18 | Jasmine McCrea | 17 | Dorset | 56.57 |
| 4 | 20 | Athena Clayson | 17 | Devon | 55.93 |
| 5 | 19 | Emily Large | 17 | N & Durham | 56.42 |
| 6 | 17 | Jemima Hall | 17 | Berks&SBucks | 56.64 |
| 7 | 15 | Medi Harris | 16 | Swim Wales W | 57.16 |
| 8 | 13 | Mia Maspers | 16 | Suffolk | 57.21 |
| 9 | 11 | Macy Lawrence | 16 | Essex | 57.23 |