EVENT 302 Women 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 2 | Anais Kirby | 13 | Co Leicester | 4:49.00 |
| 3 | 4 | Zara Holt | 13 | Tadcaster | 4:48.89 |
| 4 | 6 | Ellie Barth-Wehrenalp | 13 | Basildon Ph | 4:48.64 |
| 5 | 5 | Daisy-Sian Palmer | 13 | Atlantis | 4:48.77 |
| 6 | 3 | Lucy Raper | 12 | N & D PP SC | 4:48.99 |
| 7 | 1 | Janie Finch | 13 | Co Leicester | 4:49.23 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 8 | Darcey Arnold | 13 | Elmbridge | 4:48.28 |
| 1 | 10 | Olivia Norley | 13 | RTW Monson | 4:47.01 |
| 2 | 12 | Chloe Brotherton | 12 | South Tyne | 4:46.32 |
| 3 | 14 | Iris Hurst | 13 | Warrington W | 4:46.12 |
| 4 | 16 | Isabella Thanassoulas | 14 | Camden Swiss | 4:45.84 |
| 5 | 15 | Amelia Fenner | 13 | Basildon Ph | 4:45.97 |
| 6 | 13 | Phoebe Lawton | 13 | Co Coventry | 4:46.16 |
| 7 | 11 | Nadia Olszewska | 13 | Barnet Copt | 4:46.75 |
| 8 | 9 | Tamzin Scope | 13 | Co Coventry | 4:47.56 |
| 9 | 7 | Emily Collins | 13 | Guildford Ct | 4:48.49 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 18 | Valeria Pinera Levita | 14 | Co Leeds | 4:45.48 |
| 1 | 20 | Ella Silano | 13 | Haslemere | 4:45.17 |
| 2 | 22 | Jessica Corder | 14 | Co Salford | 4:45.12 |
| 3 | 24 | Matilda Smith | 14 | N & D PP SC | 4:44.64 |
| 4 | 26 | Erin Johnson | 14 | Nuneaton | 4:44.18 |
| 5 | 25 | Annabelle Cooper | 14 | Wycombe Dist | 4:44.45 |
| 6 | 23 | Evelyn Hallissey | 14 | Newcastle | 4:44.95 |
| 7 | 21 | Olivia Robins | 13 | Co Birm'ham | 4:45.16 |
| 8 | 19 | Rosie Grosvenor | 12 | Co Birm'ham | 4:45.24 |
| 9 | 17 | Lauren Dennett | 14 | Io Man | 4:45.49 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 28 | Mia Boaler | 14 | Nuneaton | 4:43.77 |
| 1 | 30 | Constance Logan | 15 | Mt Kelly | 4:43.34 |
| 2 | 32 | Katy Wun | 14 | Camden Swiss | 4:43.17 |
| 3 | 34 | Olivia Watts | 14 | Warrington W | 4:42.75 |
| 4 | 36 | Molly Gould | 16 | N & D PP SC | 4:42.68 |
| 5 | 35 | Chiara Reedha | 14 | Co Leicester | 4:42.72 |
| 6 | 33 | Jennifer Walker | 15 | Bassetlaw SS | 4:43.03 |
| 7 | 31 | Harriett Jones | 14 | Plymouth Lea | 4:43.33 |
| 8 | 29 | Isobel Hitchmough | 14 | Warrington W | 4:43.71 |
| 9 | 27 | Esmee Slinn | 14 | Co Leicester | 4:43.95 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 38 | Cara Tohill | 16 | Co Salford | 4:42.52 |
| 1 | 40 | Bo Buckley | 15 | TigersJersey | 4:42.38 |
| 2 | 42 | Annalise Mendoza | 15 | KingstonHull | 4:42.28 |
| 3 | 44 | Amelia Gerrard | 14 | Warrington W | 4:41.50 |
| 4 | 46 | Grace Jackson | 15 | Co Salford | 4:41.40 |
| 5 | 45 | Megan Cumner | 16 | Plymouth Lea | 4:41.41 |
| 6 | 43 | Mei Yuasa | 13 | Co Leeds | 4:41.79 |
| 7 | 41 | Jessica Lines | 14 | Co Leicester | 4:42.29 |
| 8 | 39 | Bianca Stavar Albarral | 14 | Lancing Col | 4:42.45 |
| 9 | 37 | Millie Cammock | 14 | N & D PP SC | 4:42.56 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 48 | Poppy Jeffery | 15 | Killerwhales | 4:41.12 |
| 1 | 50 | Frankie Hanson | 15 | TauntonDeane | 4:40.54 |
| 2 | 52 | Alicia Bethell | 15 | Wycombe Dist | 4:40.27 |
| 3 | 54 | Ella Smith | 14 | N & D PP SC | 4:39.90 |
| 4 | 56 | Evie Hands | 16 | Nuneaton | 4:39.77 |
| 5 | 55 | Ellie Freeze | 15 | Sutton Cheam | 4:39.86 |
| 6 | 53 | Millie Dixon | 16 | Mt Kelly | 4:40.08 |
| 7 | 51 | Jessica Thomas | 15 | N & D PP SC | 4:40.36 |
| 8 | 49 | Annie Sanders | 16 | Bromley | 4:40.61 |
| 9 | 47 | Rachel Webb | 16 | Bassetlaw SS | 4:41.30 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 58 | Chloe Cooke | 16 | Co Sheffield | 4:39.56 |
| 1 | 60 | Nicole Quiller | 16 | Mt Kelly | 4:39.31 |
| 2 | 62 | Jessica Gable | 16 | RTW Monson | 4:39.07 |
| 3 | 64 | Lilia Fornasier | 15 | RTW Monson | 4:38.78 |
| 4 | 66 | Sophie Traill | 16 | Stockport Mo | 4:37.55 |
| 5 | 65 | Emily Maxwell | 16 | N & D PP SC | 4:38.61 |
| 6 | 63 | Asta Maddox | 15 | Millfield | 4:38.97 |
| 7 | 61 | Amelie Shaw | 16 | Guildford Ct | 4:39.27 |
| 8 | 59 | Lucie Bannatyne | 16 | Co Leicester | 4:39.33 |
| 9 | 57 | Megan Rickels | 15 | Winsford | 4:39.75 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 69 | Sophie Dowding | 16 | teamipswich | 4:35.86 |
| 1 | 73 | Olivia Sheehan | 18 | Wigan BEST | 4:32.40 |
| 2 | 77 | Harriet Oxley | 18 | Repton | 4:31.50 |
| 3 | 81 | Jessica Arundale | 18 | Barnet Copt | 4:29.93 |
| 4 | 85 | Eve Leleux | 20 | Wrekin SC | 4:29.44 |
| 5 | 83 | Beth Hall | 18 | Mt Kelly | 4:29.67 |
| 6 | 79 | Georgia Robertson | 18 | Co Sheffield | 4:30.80 |
| 7 | 75 | Liberty Gordon | 19 | Rushmoor Ryl | 4:31.71 |
| 8 | 71 | Holly Lamb | 18 | Co Leicester | 4:33.03 |
| 9 | 67 | Alana Woodhall | 16 | TigersJersey | 4:36.97 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 70 | Louise Ashford | 18 | Maidenhead | 4:33.17 |
| 1 | 74 | Pearle Griffiths | 20 | SurreyUni SC | 4:31.98 |
| 2 | 78 | Gemma Dilks | 18 | Tiverton | 4:31.33 |
| 3 | 82 | Amber Downham | 18 | Plymouth Lea | 4:29.91 |
| 4 | 86 | Mollie Fisher | 18 | Rotherham Mo | 4:29.29 |
| 5 | 84 | Livia Kingsland | 18 | Nova Cent'n | 4:29.65 |
| 6 | 80 | Amber Witcombe | 18 | Soundwell | 4:30.72 |
| 7 | 76 | Poppy Baybutt | 18 | Co Milton K | 4:31.65 |
| 8 | 72 | Olivia Hunter | 19 | Co Leicester | 4:32.82 |
| 9 | 68 | Lexie O'Connor | 16 | Basildon Ph | 4:36.29 |