EVENT 504 Womens MC 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 2 | 3 | Katie Crowhurst | 11 | S13 | Wycombe Dist | 6:41.42 |
| 3 | 7 | Grace Harvey | 17 | S7 | Hoddesdon | 5:53.16 |
| 4 | 11 | Coral Farrell | 14 | S10 | Warrington W | 5:13.47 |
| 5 | 9 | Harriet Dickinson | 18 | S10 | Clevedon | 5:35.90 |
| 6 | 5 | Levana Hanson | 15 | S8 | Gloucester | 6:10.26 |
| 7 | 1 | G Cooper-Holmes | 15 | S7 | Carlisle Aq | 7:14.04 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club/Country | Time |
| 2 | 4 | Katie Rilett-Young | 17 | S6 | Burnley BOBC | 6:24.03 |
| 3 | 8 | Jay McCabe | 13 | S9 | Derwentside | 5:39.13 |
| 4 | 12 | Lily Macleod | 14 | S13 | RichmondDale | 5:08.27 |
| 5 | 10 | Megan Richter | 15 | S9 | Orion | 5:22.92 |
| 6 | 6 | Eleanor Bamber | 19 | S10 | Glossop | 5:55.89 |
| 7 | 2 | Porsha Jones | 13 | S10 | Shrewsbury | 6:52.82 |