| | Heat Number - 1 | | | |
| Lane | Comp.No. | __________Name__________ | AaD | Club/Country | Time |
| 3 | 1 | Lauren CRAWFORD | 8 | Co Cambridge | 1:30.00 |
| 4 | 2 | Ginny ROSE | 10 | Co Cambridge | 1:05.88 |
| 5 | 3 | Eve WILLIAMS | 10 | Co Cambridge | 1:05.00 |
| | Heat Number - 2 | | | |
| Lane | Comp.No. | __________Name__________ | AaD | Club/Country | Time |
| 1 | 4 | Emily WINDSOR | 12 | Co Cambridge | 1:03.78 |
| 2 | 5 | Florence JONES | 10 | Co Cambridge | 1:00.00 |
| 3 | 6 | Kate HILL | 12 | Co Cambridge | 57.42 |
| 4 | 7 | Amy DRYSDALE | 10 | Co Cambridge | 55.00 |
| 5 | 8 | Tamsin DRYSDALE | 12 | Co Cambridge | 55.00 |
| 6 | 9 | Zoe HILL | 10 | Co Cambridge | 52.68 |
| 7 | 10 | Louise SCOTT | 12 | Co Cambridge | 52.35 |
| 8 | 11 | Ryanne BAILEY | 10 | Co Cambridge | 52.02 |
| | Heat Number - 3 | | | |
| Lane | Comp.No. | __________Name__________ | AaD | Club/Country | Time |
| 1 | 12 | Zoe KORNIOTIS | 15 | Co Cambridge | 51.77 |
| 2 | 13 | Hannah SABEY | 11 | Co Cambridge | 51.12 |
| 3 | 14 | Alexandra HOLT | 11 | Co Cambridge | 50.59 |
| 4 | 15 | Laura WEISE | 16 | Co Cambridge | 50.00 |
| 5 | 16 | Hannah JONES | 12 | Co Cambridge | 50.00 |
| 6 | 17 | Rebecca MORGAN | 12 | Co Cambridge | 48.32 |
| 7 | 18 | Sam AUKER | 12 | Co Cambridge | 47.81 |
| 8 | 19 | Sarah PEDDER | 11 | Co Cambridge | 45.62 |
| | Heat Number - 4 | | | |
| Lane | Comp.No. | __________Name__________ | AaD | Club/Country | Time |
| 1 | 20 | Katie-jane ISBISTER | 12 | Co Cambridge | 45.52 |
| 2 | 21 | Nicola JEFFERIES | 10 | Co Cambridge | 44.25 |
| 3 | 22 | Ana D'ESCRIVAN-NOTT | 13 | Co Cambridge | 44.00 |
| 4 | 23 | Georgia CRAWFORD | 11 | Co Cambridge | 43.13 |
| 5 | 24 | Fay WESTWOOD | 15 | Co Cambridge | 42.14 |
| 6 | 25 | On ching LO | 13 | Co Cambridge | 42.04 |
| 7 | 26 | Sophie LANKFORD | 12 | Co Cambridge | 41.51 |
| 8 | 27 | Emma STRUTHERS | 13 | Co Cambridge | 39.58 |
| | Heat Number - 5 | | | |
| Lane | Comp.No. | __________Name__________ | AaD | Club/Country | Time |
| 1 | 29 | Holly REES | 14 | Co Cambridge | 39.12 |
| 2 | 31 | Victoria WAY | 15 | Co Cambridge | 37.82 |
| 3 | 33 | Mara JOHNSON | 15 | Co Cambridge | 36.00 |
| 4 | 35 | Sophie LANHAM | 14 | Co Cambridge | 35.45 |
| 5 | 34 | Bryony ROWSEL | 14 | Co Cambridge | 35.50 |
| 6 | 32 | Millie ROSE | 12 | Co Cambridge | 36.26 |
| 7 | 30 | Zoe OTHIENO | 14 | Co Cambridge | 38.68 |
| 8 | 28 | Sarah BRENNAN | 14 | Co Cambridge | 39.48 |
| | Heat Number - 6 | | | |
| Lane | Comp.No. | __________Name__________ | AaD | Club/Country | Time |
| 1 | 37 | Catherine MUMFORD | 16 | Co Cambridge | 34.64 |
| 2 | 39 | Charlotte BEGG | 13 | Co Cambridge | 34.49 |
| 3 | 41 | Isabella THOMSON | 15 | Co Cambridge | 32.03 |
| 4 | 43 | Soraya SASSANI | 15 | Co Cambridge | 30.30 |
| 5 | 42 | Katherine HEDLEY | 21 | Co Cambridge | 31.22 |
| 6 | 40 | Ruth BROWN | 37 | Co Cambridge | 33.53 |
| 7 | 38 | Ellie WINTER | 12 | Co Cambridge | 34.50 |
| 8 | 36 | Georgina ROUGHSEDGE | 14 | Co Cambridge | 35.10 |