EVENT 205 Female 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Caitlin Davidson | 13 | Nova Cent'n | 5:33.91 |
| 3 | 3 | Abigail Betts | 15 | Bassetlaw SS | 5:33.26 |
| 4 | 5 | Isobelle Rafferty | 14 | Bassetlaw SS | 5:33.02 |
| 5 | 4 | Isabelle Tagg | 14 | Nova Cent'n | 5:33.20 |
| 6 | 2 | Kayla Godfrey | 16 | Repton | 5:33.64 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 7 | Ava Steans | 15 | Co Leicester | 5:32.80 |
| 2 | 9 | Olivia Tagg | 12 | Nova Cent'n | 5:32.00 |
| 3 | 11 | Jessica Purser | 14 | Braunstone | 5:29.65 |
| 4 | 13 | Chloe Morley | 13 | Co Leicester | 5:27.60 |
| 5 | 12 | Paige Bagshaw | 14 | Nova Cent'n | 5:29.20 |
| 6 | 10 | Hannah Bruce | 16 | South Lincs | 5:30.44 |
| 7 | 8 | Iona Watson | 16 | Bassetlaw SS | 5:32.40 |
| 8 | 6 | Isabel Plummer | 15 | Long Eaton | 5:32.95 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 15 | Phillippa Cutmore | 13 | Corby | 5:25.30 |
| 2 | 17 | Emily Talkes | 13 | Lincoln Vulc | 5:24.33 |
| 3 | 19 | Summer Chirita | 13 | Repton | 5:22.47 |
| 4 | 21 | Emma Graham-Brown | 16 | Co Leicester | 5:21.11 |
| 5 | 20 | Sian Hedley | 14 | Nova Cent'n | 5:21.33 |
| 6 | 18 | Phoebe Benyon | 15 | Nova Cent'n | 5:22.90 |
| 7 | 16 | Zoe Ellis | 16 | Leic Sharks | 5:24.40 |
| 8 | 14 | Sophie Lane | 13 | Co Leicester | 5:25.82 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 23 | Effie Chapman | 13 | Nova Cent'n | 5:20.70 |
| 2 | 25 | Phebe Adams | 16 | Northampton | 5:16.00 |
| 3 | 27 | Orna Lett | 15 | Northampton | 5:11.60 |
| 4 | 29 | Alice Streeter | 19 | Uni of Nott | 5:11.43 |
| 5 | 28 | Chloe Gent | 15 | Co Leicester | 5:11.54 |
| 6 | 26 | C Callaghan-Wetton | 16 | Nova Cent'n | 5:15.30 |
| 7 | 24 | Jessica Oxley | 16 | Co Leicester | 5:18.18 |
| 8 | 22 | Daisy Tatlow-Turner | 15 | Chesterfield | 5:21.00 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 31 | Madeleine Soper | 22 | Uni of Nott | 5:09.00 |
| 2 | 33 | Aila Coletta | 13 | Repton | 5:07.70 |
| 3 | 35 | Grace Turner | 18 | Grantham | 5:04.55 |
| 4 | 37 | Alice Ball | 28 | Market Har | 5:02.92 |
| 5 | 36 | Holly Gent | 14 | Co Leicester | 5:04.20 |
| 6 | 34 | Sana Le Falher | 18 | Repton | 5:06.08 |
| 7 | 32 | Francesca Hallam-Stott | 18 | Nova Cent'n | 5:08.70 |
| 8 | 30 | Emily Louise Riach | 23 | Nova Cent'n | 5:10.15 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 39 | Francesca Harrison | 16 | Co Leicester | 4:57.52 |
| 2 | 41 | Aurelia Wawrzyniewicz | 16 | Repton | 4:54.44 |
| 3 | 43 | Lily Freeman | 18 | Derby Excel | 4:53.78 |
| 4 | 45 | Sholah Robinson | 19 | Lboro Uni | 4:43.37 |
| 5 | 44 | Frouke Ludwig | 17 | Lboro Uni | 4:51.86 |
| 6 | 42 | Clara Ginnis | 18 | Repton | 4:54.30 |
| 7 | 40 | Janie Finch | 15 | Co Leicester | 4:55.15 |
| 8 | 38 | Millie Wells | 18 | Lboro Uni | 5:00.95 |