EVENT 112 Womens Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 1 | Delphine Little | 13 | Co Oxford | 5:24.06 |
| 1 | 3 | Rachel Bradley | 13 | Middlesboro | 5:23.82 |
| 2 | 5 | Isobel Bryant | 13 | Guildford Ct | 5:22.55 |
| 3 | 7 | Sophie Pickering | 16 | teamipswich | 5:21.76 |
| 4 | 9 | Carys O'Reilly | 13 | Co Leicester | 5:21.37 |
| 5 | 8 | Sapphira Gabbani | 13 | Co Sheffield | 5:21.41 |
| 6 | 6 | Ellie Perris | 16 | Pioneer 79 | 5:22.49 |
| 7 | 4 | Eleanor Bainbridge | 13 | Ellesmere Co | 5:22.56 |
| 8 | 2 | Issey-May Reeves | 12 | Co Sheffield | 5:23.85 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 11 | Anna Livermore | 16 | SwimTrafford | 5:20.50 |
| 1 | 13 | Lauren Woods | 14 | Lincoln Vulc | 5:20.38 |
| 2 | 15 | Emily Milton | 14 | Romford Town | 5:20.24 |
| 3 | 17 | Elizabeth Hawkard | 14 | KingstonHull | 5:20.03 |
| 4 | 19 | Aliyah-Mai Webb | 16 | Exeter City | 5:19.63 |
| 5 | 18 | Lauren McConnachie | 14 | Co Coventry | 5:19.65 |
| 6 | 16 | Frances Newe | 13 | Dulwich Dolp | 5:20.22 |
| 7 | 14 | Alice Barton | 13 | Aquae Sulis | 5:20.36 |
| 8 | 12 | Ella Thatcher-Plant | 14 | Wrekin Coll | 5:20.49 |
| 9 | 10 | Ninah Strydom | 16 | Sevenoaks | 5:21.09 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 21 | Rusha Mondal | 16 | Co Manch Aq | 5:19.23 |
| 1 | 23 | Sophie Eley | 16 | Derventio | 5:19.06 |
| 2 | 25 | Madeleine Burton | 14 | RTW Monson | 5:19.00 |
| 3 | 27 | Megan Whittaker | 16 | Leander | 5:18.93 |
| 4 | 29 | Megan Pye | 14 | UEA Norwich | 5:18.86 |
| 5 | 28 | Milly Boulding | 12 | Bo Kirklees | 5:18.87 |
| 6 | 26 | Ella Cowan | 13 | Co Leeds | 5:18.97 |
| 7 | 24 | Amelia Monaghan | 14 | Co Peterboro | 5:19.02 |
| 8 | 22 | Ellie Wheeler | 14 | Basildon Ph | 5:19.07 |
| 9 | 20 | Alisha Stephenson | 14 | Co Birm'ham | 5:19.61 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 31 | Tilly Arrand | 15 | Donc Dartes | 5:18.14 |
| 1 | 33 | Rebecca Fisher | 15 | Co Leeds | 5:17.88 |
| 2 | 35 | Amy Mills | 15 | Bourmth Coll | 5:17.80 |
| 3 | 37 | Kate Windle | 16 | Guildford Ct | 5:17.59 |
| 4 | 39 | Ella Kenway | 16 | Guildford Ct | 5:17.34 |
| 5 | 38 | Isobel Hume | 14 | Northampton | 5:17.57 |
| 6 | 36 | Rose Compton | 13 | Sevenoaks | 5:17.71 |
| 7 | 34 | Jasmine McCrea | 15 | Poole | 5:17.81 |
| 8 | 32 | Ellenor Rixon | 16 | Guildford Ct | 5:18.12 |
| 9 | 30 | Amy Mead | 14 | Nova Cent'n | 5:18.42 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 41 | Rebecca Winn | 16 | Co Coventry | 5:16.49 |
| 1 | 43 | Isabel Spinley | 16 | Deepings | 5:16.34 |
| 2 | 45 | Jessica Banks | 16 | Wolv'hampton | 5:16.19 |
| 3 | 47 | Christa Wilson | 13 | Bo Stockton | 5:16.02 |
| 4 | 49 | Freya Hopkins | 14 | Crawley | 5:15.76 |
| 5 | 48 | Betsy Wizard | 13 | Northampton | 5:15.83 |
| 6 | 46 | Charlotte Wynne-Jones | 13 | Bicester | 5:16.09 |
| 7 | 44 | Paris Grenier | 13 | Co Leeds | 5:16.31 |
| 8 | 42 | Olivia Herron | 12 | Co Salford | 5:16.38 |
| 9 | 40 | Charlotte Ashwin | 15 | Mid Beds | 5:17.21 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 51 | Freya Shaw | 15 | Teddington | 5:15.62 |
| 1 | 53 | Amy West | 12 | Stockport Mo | 5:15.36 |
| 2 | 55 | Lucy Drinkall | 15 | Staines | 5:15.24 |
| 3 | 57 | Emily Eveling | 14 | Exeter City | 5:14.71 |
| 4 | 59 | Chelsea McKay | 15 | Co Leicester | 5:14.52 |
| 5 | 58 | Spencer Williams | 16 | Brompton | 5:14.65 |
| 6 | 56 | Olivia Norman | 14 | Colchester | 5:14.94 |
| 7 | 54 | Dolly Trigg | 18 | teamipswich | 5:15.24 |
| 8 | 52 | Eleanor Morris | 17 | Crawley | 5:15.38 |
| 9 | 50 | Megan Wallis | 15 | Guildford Ct | 5:15.67 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 61 | Freya Colbert | 12 | Grantham | 5:14.37 |
| 1 | 63 | Lucy Nicholson | 16 | York City | 5:14.21 |
| 2 | 65 | Anna Smail | 14 | Ellesmere Co | 5:13.91 |
| 3 | 67 | Abigail Shuttleworth | 17 | Co Bradford | 5:13.83 |
| 4 | 69 | Hannah Knight | 17 | Ellesmere Co | 5:13.47 |
| 5 | 68 | Jade Kennerell | 15 | Nova Cent'n | 5:13.81 |
| 6 | 66 | Mia Slevin | 13 | Derventio | 5:13.84 |
| 7 | 64 | Megan Molloy | 14 | Enfield Sq | 5:14.10 |
| 8 | 62 | Viktoria Gnandt | 15 | Co Leeds | 5:14.27 |
| 9 | 60 | Charlotte Rigg | 14 | Co Birm'ham | 5:14.41 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 72 | Jacqueline Knight | 17 | Portsmouth N | 5:13.25 |
| 1 | 76 | Lauren Harrison | 15 | Co Peterboro | 5:13.04 |
| 2 | 80 | Summer Kennedy | 15 | Derventio | 5:12.08 |
| 3 | 84 | Aisling Ruff | 18 | Co Peterboro | 5:10.04 |
| 4 | 88 | Hannah Jones | 17 | Stockport Mo | 5:07.97 |
| 5 | 86 | Danielle Gilbert | 18 | Derwentside | 5:09.60 |
| 6 | 82 | Ella Windle | 18 | Guildford Ct | 5:10.29 |
| 7 | 78 | Katie Hodgson | 17 | Guildford Ct | 5:12.44 |
| 8 | 74 | Laura Cook | 14 | Newcastle | 5:13.15 |
| 9 | 70 | Morgen Watson | 17 | Co Birm'ham | 5:13.39 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 73 | Daria Poma Kostik | 15 | Maidenhead | 5:13.22 |
| 1 | 77 | Laura Brookes | 15 | Donc Dartes | 5:12.57 |
| 2 | 81 | Eleanor Hatton | 17 | Royal Wolv | 5:11.62 |
| 3 | 85 | Isobel Meikle | 17 | Co Manch Aq | 5:10.02 |
| 4 | 89 | Bailey Andison | 19 | OSA Canada | 4:50.07 |
| 5 | 87 | Meghann Leaver | 17 | Pioneer 79 | 5:09.26 |
| 6 | 83 | Jodi Bunker | 17 | Co Sund'land | 5:10.18 |
| 7 | 79 | Elizabeth Booker | 15 | Co Bristol | 5:12.32 |
| 8 | 75 | Poppy Richardson | 15 | Co Peterboro | 5:13.09 |
| 9 | 71 | Thalia Poaros | 15 | Mt Kelly | 5:13.37 |