EVENT 15 Girl Open 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Cat | Club | Time |
| 2 | 1 | Heidi GRAHAM | 11 | | Weymouth | 6:15.79 |
| 3 | 2 | Faith PIRUS | 08 | | Bridport Bar | 5:53.84 |
| 4 | 3 | Grace PROWSE | 10 | | West Dorset | 5:50.36 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Cat | Club | Time |
| 2 | 4 | Heather SAYERS | 11 | | Weymouth | 5:43.29 |
| 3 | 5 | Josephine DOLMAN | 06 | | S Bournem'th | 5:40.28 |
| 4 | 6 | Carmen MGBADIEFE | 10 | | Poole | 5:38.92 |
| 5 | 7 | Mia FRACKIEWICZ | 10 | | S Bournem'th | 5:36.95 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Cat | Club | Time |
| 1 | 8 | Isabella GRAHAM | 09 | | West Dorset | 5:26.92 |
| 2 | 9 | Evie LOUDOUN | 08 | | S Bournem'th | 5:25.90 |
| 3 | 10 | Alyssa SCHEP | 09 | | Bridport Bar | 5:23.56 |
| 4 | 11 | Isabella HAYNES | 08 | S9 | S Bournem'th | 5:23.10 |
| 5 | 12 | Ella HOEY | 09 | | Blandford | 5:21.14 |
| 6 | 13 | Holly SYMES | 09 | | Bridport Bar | 5:15.59 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Cat | Club | Time |
| 1 | 15 | Mollie-Zena GREGORY | 08 | | S Bournem'th | 5:11.92 |
| 2 | 17 | Grace KNIGHT | 08 | | S Bournem'th | 5:07.29 |
| 3 | 19 | Ella FRANCIS | 09 | | Seagulls SC | 5:01.82 |
| 4 | 18 | Natalia BARAN | 07 | | West Dorset | 5:06.16 |
| 5 | 16 | Isla MCPHAIL | 07 | | West Dorset | 5:08.89 |
| 6 | 14 | Erin SMITH | 07 | | S Bournem'th | 5:13.44 |