EVENT 601 Women 17 Yrs/Over 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 3 | 1 | Ella Took | 04 | Newcastle | 4:37.27 |
| 4 | 3 | Isabelle Wood | 05 | StirlingSwim | 4:36.81 |
| 5 | 2 | Katie Bamborough | 04 | Mt Kelly | 4:36.98 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 4 | Lucy Hitchin | 05 | Repton | 4:36.43 |
| 1 | 6 | Rosie Domican | 04 | Co Cardiff | 4:35.98 |
| 2 | 8 | Chloe Goodridge | 05 | Northampton | 4:35.73 |
| 3 | 10 | Holly Lamb | 05 | Basildon Ph | 4:34.86 |
| 4 | 12 | Leila Flower | 04 | Leatherhead | 4:34.50 |
| 5 | 11 | Ruby Lloyd | 05 | Swansea Aq | 4:34.69 |
| 6 | 9 | Olivia Sheehan | 05 | Wigan BEST | 4:34.87 |
| 7 | 7 | Amelia Childs | 04 | Sevenoaks | 4:35.80 |
| 8 | 5 | Federica Ghibellini | 04 | Mt Kelly | 4:36.36 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 14 | Jessica Arundale | 05 | Barnet Copt | 4:33.92 |
| 1 | 16 | Liberty Gordon | 04 | Rushmoor Ryl | 4:33.17 |
| 2 | 18 | Issey-May Reeves | 04 | Co Sheffield | 4:32.85 |
| 3 | 20 | Kailyn Hall | 04 | Aberdeen Per | 4:32.13 |
| 4 | 22 | Merissa Booth | 05 | Wycombe Dist | 4:31.75 |
| 5 | 21 | Amy West | 04 | Stockport Mo | 4:31.91 |
| 6 | 19 | Emma Bennett | 05 | RTW Monson | 4:32.68 |
| 7 | 17 | Rachel Hornby | 04 | Wigan BEST | 4:32.95 |
| 8 | 15 | Niamh Ward | 04 | Team Bath AS | 4:33.64 |
| 9 | 13 | Amber Downham | 05 | Plymouth Lea | 4:34.20 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 24 | Pearle Griffiths | 03 | Guildford Ct | 4:31.14 |
| 1 | 26 | Rachel Bradley | 03 | N & D PP SC | 4:30.71 |
| 2 | 28 | Harriet Oxley | 05 | Co Leicester | 4:30.51 |
| 3 | 30 | Georgia Robertson | 05 | Co Sheffield | 4:29.55 |
| 4 | 32 | Megan Speirs | 04 | Nova Cent'n | 4:28.96 |
| 5 | 31 | Mairi Craig | 04 | StirlingSwim | 4:29.35 |
| 6 | 29 | Jessica Dickinson | 05 | Swansea Uni | 4:29.79 |
| 7 | 27 | Lauren Bradley-Holt | 04 | Co Salford | 4:30.62 |
| 8 | 25 | Louise Ashford | 05 | Maidenhead | 4:31.01 |
| 9 | 23 | Mollie Fisher | 05 | Rotherham Mo | 4:31.35 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 34 | Sacha Thomas | 03 | Co Norwich | 4:28.86 |
| 1 | 36 | Henrietta D'Ammassa | 05 | Repton | 4:28.36 |
| 2 | 38 | Alicia Dingle | 02 | Loughboro Un | 4:27.97 |
| 3 | 40 | Livia Kingsland | 05 | Nova Cent'n | 4:27.92 |
| 4 | 42 | Lola Davison | 03 | N & D PP SC | 4:27.50 |
| 5 | 41 | Sophie Main | 04 | Mt Kelly | 4:27.60 |
| 6 | 39 | Nelly Kinch | 01 | Nova Cent'n | 4:27.96 |
| 7 | 37 | Megan Barnes | 03 | Mt Kelly | 4:28.07 |
| 8 | 35 | Harriet Salisbury | 04 | Co Peterboro | 4:28.86 |
| 9 | 33 | Emily Forwood | 04 | Mt Kelly | 4:28.88 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 45 | Eve Leleux | 03 | Wrekin SC | 4:26.82 |
| 1 | 49 | Natasha Simson | 05 | Warrender Ba | 4:23.98 |
| 2 | 53 | Lucy Hedley | 04 | Newcastle | 4:21.51 |
| 3 | 57 | Ella Dyson | 04 | Wycombe Dist | 4:18.96 |
| 4 | 61 | Leah Crisp | 01 | Bath NC | 4:14.48 |
| 5 | 59 | Aimee Hood | 04 | Co Birm'ham | 4:17.67 |
| 6 | 55 | Michaella Glenister | 02 | UniOfStirl | 4:21.04 |
| 7 | 51 | Betsy Wizard | 03 | Northampton | 4:22.59 |
| 8 | 47 | Nicole Ryan | 98 | Guildford Ct | 4:25.31 |
| 9 | 43 | Isabelle Jopson | 03 | Romford Town | 4:27.48 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 46 | Rachel Anderson | 02 | Loughboro Un | 4:25.88 |
| 1 | 50 | Laura Hodgson | 05 | Newcastle | 4:23.43 |
| 2 | 54 | Katie Thompson | 02 | Co Birm'ham | 4:21.08 |
| 3 | 58 | Beatrice Varley | 03 | Plymouth Lea | 4:18.23 |
| 4 | 62 | Mia Slevin | 03 | Derventio | 4:13.24 |
| 5 | 60 | Amber Keegan | 97 | Co Sheffield | 4:17.53 |
| 6 | 56 | Fleur Lewis | 03 | Barnet Copt | 4:20.69 |
| 7 | 52 | Anya Preece | 03 | Nova Cent'n | 4:22.15 |
| 8 | 48 | Aimee Monks | 05 | Royal Wolv | 4:25.19 |
| 9 | 44 | Amelia Brian | 05 | Beckenham | 4:27.06 |