EVENT 302 Women's 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 2 | 2 | Isabella Hoare | 07 | Worcester | 5:09.55 |
| 3 | 4 | Charlotte Johnson | 03 | Swansea Uni | 5:09.04 |
| 4 | 6 | Charlotte Surrell | 07 | Co Birm'ham | 5:08.73 |
| 5 | 5 | Charlotte Cope | 07 | Guildford Ct | 5:08.97 |
| 6 | 3 | Eve Horton | 06 | Wigan BEST | 5:09.35 |
| 7 | 1 | Sophie Traill | 07 | Stockport Mo | 5:09.63 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 8 | Rebecca Coogan | 08 | Romford Town | 5:08.34 |
| 1 | 10 | Martyna Karabacz | 08 | Chelsea&West | 5:08.07 |
| 2 | 12 | Rebecca Reid | 02 | Aberdeen | 5:07.64 |
| 3 | 14 | Lois Child | 10 | Harrogate | 5:07.50 |
| 4 | 16 | Evi Mackie | 09 | Lanark | 5:07.24 |
| 5 | 15 | Emma Allatt-File | 06 | Guildford Ct | 5:07.44 |
| 6 | 13 | Abby Mitchell | 06 | Co Leicester | 5:07.51 |
| 7 | 11 | Isabelle Price | 09 | Co Birm'ham | 5:07.80 |
| 8 | 9 | Oriana Wheeler | 05 | Swansea Uni | 5:08.15 |
| 9 | 7 | Gisella Silano | 10 | Guildford Ct | 5:08.62 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 18 | Zara Beaumont | 06 | Millfield | 5:07.04 |
| 1 | 20 | Holly Hopwood | 08 | Guildford Ct | 5:06.76 |
| 2 | 22 | Gemma Dilks | 05 | Tiverton | 5:06.69 |
| 3 | 24 | Kiera Noon | 00 | Co Bristol | 5:05.78 |
| 4 | 26 | E O'Halleron-Hutchinso | 07 | N & D PP SC | 5:05.73 |
| 5 | 25 | Willow Harrison | 09 | Co Sheffield | 5:05.77 |
| 6 | 23 | Mollie Fisher | 05 | Co Manch Aq | 5:05.78 |
| 7 | 21 | Evangeline Stacey | 07 | Co Leeds | 5:06.74 |
| 8 | 19 | Morgan Brand | 06 | Rugby | 5:06.95 |
| 9 | 17 | Seren Tallantyre | 08 | N & D PP SC | 5:07.05 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 28 | Erin Taylor | 05 | Fins | 5:05.68 |
| 1 | 30 | Petra Varga | 08 | Wirral Metro | 5:05.28 |
| 2 | 32 | Hollie Whaymand | 08 | Maxwell | 5:05.09 |
| 3 | 34 | Darcey Crossley | 08 | Co Leeds | 5:04.94 |
| 4 | 36 | Ella Blocksidge | 06 | Co Salford | 5:04.62 |
| 5 | 35 | Carys O'Reilly | 03 | Co Sheffield | 5:04.64 |
| 6 | 33 | Madison Johnson | 05 | Rotherham Mo | 5:05.00 |
| 7 | 31 | Emmie Aitken | 09 | UoAPS | 5:05.11 |
| 8 | 29 | Lara Turner | 05 | AJ Newcastle | 5:05.34 |
| 9 | 27 | Chloe Cooke | 07 | Co Sheffield | 5:05.73 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 38 | Emma Price | 08 | N & D PP SC | 5:03.91 |
| 1 | 40 | Alice Forrest | 09 | N & D PP SC | 5:03.57 |
| 2 | 42 | Lily Jackson-Oates | 05 | Nova Cent'n | 5:03.45 |
| 3 | 44 | Jodie Dilks | 05 | Tiverton | 5:03.08 |
| 4 | 46 | Zara Krawiec | 09 | East Lothian | 5:02.82 |
| 5 | 45 | Sophie Brassington | 06 | Mt Kelly | 5:02.93 |
| 6 | 43 | Rachel Hornby | 04 | Swansea Uni | 5:03.20 |
| 7 | 41 | Louise Bressler | 06 | Guildford Ct | 5:03.47 |
| 8 | 39 | Laura Sharp | 02 | Swansea Uni | 5:03.78 |
| 9 | 37 | Matilda Ransome | 06 | Co Cambridge | 5:03.97 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 48 | Lydia Cordle | 10 | Repton | 5:01.88 |
| 1 | 50 | Eloise Rathbone-Jones | 04 | Co Cardiff | 5:01.73 |
| 2 | 52 | Lacey Roberts | 07 | Plymouth Lea | 5:01.43 |
| 3 | 54 | Niamh Savory | 08 | Newcastle | 5:00.72 |
| 4 | 56 | Evangeline Belt | 06 | Plymouth Lea | 5:00.51 |
| 5 | 55 | Hazel-Anne Carter | 08 | Wycombe Dist | 5:00.56 |
| 6 | 53 | Libby Freeman | 06 | N & D PP SC | 5:00.86 |
| 7 | 51 | Amy Kenworthy | 06 | Winsford | 5:01.51 |
| 8 | 49 | Livia Kingsland | 05 | Nova Cent'n | 5:01.81 |
| 9 | 47 | Annabel Cooke | 09 | Co Sheffield | 5:02.13 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 59 | Ines Guimond-Beetham | 08 | Camden Swiss | 4:58.88 |
| 1 | 63 | Matilda Potter | 08 | Co Leeds | 4:57.51 |
| 2 | 67 | Abbie Roscoe | 09 | Wirral Metro | 4:56.33 |
| 3 | 71 | Holly Robinson | 05 | Repton | 4:54.33 |
| 4 | 75 | Katie Shanahan | 04 | UniOfStirl | 4:36.74 |
| 5 | 73 | Amelie Blocksidge | 09 | Co Salford | 4:48.46 |
| 6 | 69 | Ailsa McDonald | 01 | Edinburgh Un | 4:54.49 |
| 7 | 65 | Sholah Robinson | 06 | Co Sheffield | 4:57.33 |
| 8 | 61 | Holly Marshall | 06 | Repton | 4:58.57 |
| 9 | 57 | Millie Threlfall | 09 | Co Leeds | 4:59.45 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 0 | 60 | Anna Farrow | 05 | Bath Univ | 4:58.71 |
| 1 | 64 | Katie Lee | 08 | Co Salford | 4:57.48 |
| 2 | 68 | Amalie Smith | 09 | RTW Monson | 4:54.57 |
| 3 | 72 | Beatrice Varley | 03 | Plymouth Lea | 4:49.04 |
| 4 | 76 | Freya Colbert | 04 | L'borogh PC | 4:35.28 |
| 5 | 74 | Michaella Glenister | 02 | UniOfStirl | 4:46.36 |
| 6 | 70 | Suzie McNair | 07 | StirlingSwim | 4:54.35 |
| 7 | 66 | Matilda Bogle | 06 | teamipswich | 4:56.62 |
| 8 | 62 | Eleanor Broughton | 06 | Repton | 4:58.44 |
| 9 | 58 | Abigail Miles | 04 | Co Sheffield | 4:59.05 |