EVENT 124 Girls 12/13 Yrs 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 2 | Rachel Andrews | 04 | Bedfordshire | 1:18.08 |
| 2 | 4 | Alisha Greenshields | 04 | Warwicks | 1:14.37 |
| 3 | 6 | Bethany Eagle-Brown | 03 | Lincolnshire | 1:11.54 |
| 4 | 8 | Sophie Huggon | 03 | Cumbria | 1:11.04 |
| 5 | 7 | Helena Mole | 03 | Staffs | 1:11.12 |
| 6 | 5 | Emma Nettleton | 04 | Cornwall | 1:12.20 |
| 7 | 3 | Caitlyn Fry | 04 | Wiltshire | 1:16.20 |
| 8 | 1 | Hannah Swift | 04 | Shropshire | 1:20.44 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club/Country | Time |
| 1 | 10 | Ellie Walker | 04 | Norfolk | 1:10.60 |
| 2 | 12 | Charlotte Emery | 03 | Devon | 1:09.30 |
| 3 | 14 | Parmis Vaezi | 03 | Scot West | 1:08.22 |
| 4 | 16 | Ella Chown | 03 | Dorset | 1:05.60 |
| 5 | 15 | Jade Goode | 03 | Cambs | 1:06.30 |
| 6 | 13 | Betsy Wizard | 03 | Northants | 1:09.17 |
| 7 | 11 | Niamh Ryan | 03 | Sussex | 1:09.81 |
| 8 | 9 | Megan Annis | 03 | Worcs | 1:10.74 |