EVENT 304 Womens MC 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 1 | 5 | Charlotte Hyde | 15 | S7 | Camden Swiss | 6:34.76 |
| 2 | 9 | Ella Cooper-Holmes | 17 | S7 | Cockermouth | 6:23.73 |
| 3 | 13 | Olivia-Mae Cameron | 18 | S8 | Mt Kelly | 5:58.24 |
| 4 | 17 | Katie Crowhurst | 13 | S13 | Wycombe Dist | 5:38.04 |
| 5 | 15 | Drew Stables | 15 | S10 | Cockermouth | 5:39.18 |
| 6 | 11 | Porsha Jones | 15 | S10 | Shrewsbury | 6:03.53 |
| 7 | 7 | Isabel Dean | 13 | S10 | Leic Peng | 6:31.00 |
| 8 | 3 | Georgia Howell | 15 | S6 | Littleh'pton | 7:24.31 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 0 | 2 | Genevieve Hunter | 15 | S8 | Beachfield | 7:32.93 |
| 1 | 6 | Madeleine Harris | 14 | S9 | Elmbridge | 6:31.95 |
| 2 | 10 | Tully Kearney | 20 | S7 | Co Manch Aq | 6:06.05 |
| 3 | 14 | Maya Brisco | 17 | S9 | Staines | 5:53.56 |
| 4 | 18 | Harriet Dickinson | 20 | S10 | Gloucester | 5:23.72 |
| 5 | 16 | Eleanor Bamber | 21 | S10 | Satellite | 5:38.80 |
| 6 | 12 | Catherine Marr | 15 | S13 | UEA Norwich | 6:00.18 |
| 7 | 8 | Hollie Pinder | 15 | S9 | Donc Dartes | 6:24.17 |
| 8 | 4 | Anna Binns | 29 | S12 | Orion | 7:04.63 |
| 9 | 1 | Ella O'Donnell | 14 | S7 | Man & NW Dis | 7:52.96 |