EVENT 103 Girls 12/13 Yrs 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 2 | Ciara Wookey | 13 | Essex | 1:20.10 |
| 1 | 4 | Rosie Windslow | 13 | Sussex | 1:19.28 |
| 2 | 6 | TIA KEIGHTLEY | 13 | Leics | 1:18.70 |
| 3 | 8 | Clara Von Opel | 13 | Middlesex | 1:18.20 |
| 4 | 10 | Millie Ravenscroft | 12 | Cheshire | 1:17.85 |
| 5 | 9 | Merewyn Jones | 13 | Notts | 1:18.00 |
| 6 | 7 | KAITLYN HANSON-PUFFER | 13 | Surrey | 1:18.50 |
| 7 | 5 | Hannah Moors | 13 | Hampshire | 1:19.16 |
| 8 | 3 | Emma Parker | 13 | Scot East | 1:19.90 |
| 9 | 1 | Tess Wesley | 13 | Suffolk | 1:23.25 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 12 | Amy Brown | 13 | Dorset | 1:16.60 |
| 1 | 14 | Olivia Davies | 13 | Swim Wales E | 1:15.94 |
| 2 | 16 | Illizane Pinfold | 13 | Ox & N Bucks | 1:15.15 |
| 3 | 18 | Abigail Miles | 13 | Yorkshire | 1:13.40 |
| 4 | 20 | Jemimah Berkeley | 13 | Kent | 1:10.60 |
| 5 | 19 | Olivia Herron | 13 | Lancashire | 1:11.84 |
| 6 | 17 | Georgia Gussey | 13 | Somerset | 1:15.10 |
| 7 | 15 | Katie Shanahan | 13 | Scot West | 1:15.70 |
| 8 | 13 | EMILY MORGAN-HUGHES | 13 | Devon | 1:16.60 |
| 9 | 11 | Seren Williams | 13 | N & Durham | 1:16.70 |