EVENT 108 Womens MC 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 2 | 1 | Aegean BRAMLEY | 16 | Caradon | 4:41.03 |
| 3 | 2 | Samantha HAMMOND | 15 | Team Bath AS | 4:41.00 |
| 4 | 3 | Katie TOWNSEND | 17 | Exeter City | 4:39.80 |
| 5 | 4 | Amy MILLS | 16 | Bourmth Coll | 4:39.75 |
| 6 | 5 | Jasmine MORONEY | 18 | Weston S M | 4:38.90 |
| 7 | 6 | Waris MILLS | 15 | Millfield | 4:38.15 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 2 | 7 | Ellena THEOBALD | 16 | Soundwell | 4:37.60 |
| 3 | 8 | Zoe GANNAWAY | 17 | Bourmth Coll | 4:36.90 |
| 4 | 9 | Isabelle HEPBURN | 15 | S Bournem'th | 4:35.31 |
| 5 | 10 | Heather WITCOMBE | 15 | Soundwell | 4:35.26 |
| 6 | 11 | Polly PAINTER | 15 | Millfield | 4:35.26 |
| 7 | 12 | Jorji LONGDON | 18 | Gloucester | 4:35.15 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 13 | Sara MAZZEO | 17 | Carn Brea | 4:34.62 |
| 1 | 14 | Amy GORDON | 16 | Team Bath AS | 4:33.88 |
| 2 | 15 | Grace WOOD | 16 | Barnstaple | 4:32.74 |
| 3 | 16 | Teagan-Mae GRAHAM | 16 | Poole | 4:32.22 |
| 4 | 17 | Imogen MORONEY | 17 | Weston S M | 4:32.10 |
| 5 | 18 | Megan VINGOE | 15 | Carn Brea | 4:31.40 |
| 6 | 19 | Savannah BARMAN | 19 | S Bournem'th | 4:30.46 |
| 7 | 20 | Robyn EDWARDS | 19 | TauntonDeane | 4:28.88 |
| 8 | 21 | Amie BUTTLE | 20 | West Dorset | 4:28.68 |
| 9 | 22 | Lucy PEARCE | 20 | S Bournem'th | 4:28.15 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 24 | Thalia POAROS | 16 | Mt Kelly | 4:26.40 |
| 1 | 26 | Isabel JONES | 17 | Millfield | 4:24.62 |
| 2 | 28 | Sophie HALL | 19 | Gloucester | 4:22.23 |
| 3 | 30 | Georgina DENNIS | 15 | Mt Kelly | 4:21.10 |
| 4 | 32 | Evan KING | 18 | Street | 4:16.14 |
| 5 | 31 | Jessica PODGER | 16 | Co Bristol | 4:20.20 |
| 6 | 29 | Chloe PLATER | 17 | Mt Kelly | 4:21.10 |
| 7 | 27 | Molly FRANCIS | 16 | Mt Kelly | 4:23.80 |
| 8 | 25 | Thea O'KEEFE | 17 | Poole | 4:25.36 |
| 9 | 23 | Misty MARSHALL-WELLING | 16 | Team Bath AS | 4:27.00 |