EVENT 205 Female 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 2 | Lauren Morley | 15 | Kettering | 5:33.38 |
| 2 | 4 | Chloe Gent | 14 | Co Leicester | 5:30.73 |
| 3 | 6 | Poppy Westmorland | 15 | Nova Cent'n | 5:27.83 |
| 4 | 8 | Megan Brown | 15 | Grantham | 5:27.37 |
| 5 | 7 | Gracie-May Cole | 16 | Lincoln Vulc | 5:27.75 |
| 6 | 5 | Phillippa Cutmore | 12 | Corby | 5:30.13 |
| 7 | 3 | Daisy Tatlow-Turner | 14 | Chesterfield | 5:32.17 |
| 8 | 1 | Philippa Bodey | 13 | Co Leicester | 5:33.50 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 10 | Emily Talkes | 12 | Lincoln Vulc | 5:26.67 |
| 2 | 12 | C Callaghan-Wetton | 15 | Nova Cent'n | 5:26.17 |
| 3 | 14 | Phebe Adams | 15 | Northampton | 5:24.60 |
| 4 | 16 | Sadie Llewellyn | 15 | Repton | 5:22.30 |
| 5 | 15 | I Parsons-Loades | 13 | Repton | 5:22.45 |
| 6 | 13 | Orla Eyton-Jones | 18 | Corby | 5:25.20 |
| 7 | 11 | Zoe Ellis | 15 | Leic Sharks | 5:26.63 |
| 8 | 9 | Lillie Hamilton | 16 | Louth | 5:26.73 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Sana Le Falher | 17 | Repton | 5:15.50 |
| 2 | 20 | Kate Andrews | 16 | Co Leicester | 5:14.19 |
| 3 | 22 | Francesca Hallam-Stott | 17 | Grantham | 5:13.60 |
| 4 | 24 | Emilia Cieszczyk | 17 | Northampton | 5:08.28 |
| 5 | 23 | Aurelia Wawrzyniewicz | 15 | Nova Cent'n | 5:10.80 |
| 6 | 21 | Holly Gent | 13 | Co Leicester | 5:13.89 |
| 7 | 19 | Hannah Bruce | 15 | South Lincs | 5:15.32 |
| 8 | 17 | Orna Lett | 14 | Northampton | 5:22.30 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 26 | Lilly Tappern | 17 | Corby | 5:07.57 |
| 2 | 28 | Eva Bailey | 18 | Lboro Uni | 5:05.30 |
| 3 | 30 | Clara Ginnis | 17 | Repton | 5:02.13 |
| 4 | 32 | Janie Finch | 14 | Co Leicester | 5:01.22 |
| 5 | 31 | Sophie Martin | 17 | Chesterfield | 5:02.10 |
| 6 | 29 | Francesca Harrison | 15 | Co Leicester | 5:04.10 |
| 7 | 27 | Jasmine Vaartjes | 15 | Repton | 5:05.50 |
| 8 | 25 | Alice Streeter | 18 | Uni of Nott | 5:07.57 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 34 | Lily Jackson-Oates | 19 | Nova Cent'n | 4:57.27 |
| 2 | 36 | Darcie Platts | 16 | Co Leicester | 4:56.61 |
| 3 | 38 | Holly Marshall | 18 | Lincoln Vulc | 4:45.89 |
| 4 | 40 | Abbie Wood | 25 | Lboro Uni | 4:27.45 |
| 5 | 39 | Elizabeth Booker | 23 | Lboro Uni | 4:36.66 |
| 6 | 37 | Lydia Cordle | 14 | Repton | 4:50.40 |
| 7 | 35 | Lily Freeman | 17 | Northampton | 4:56.80 |
| 8 | 33 | Philippa Hickman | 16 | Nova Cent'n | 4:58.67 |