EVENT 108 Womens 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 2 | 1 | Tegan LESSEY | 15 | Mt Kelly | 4:44.90 |
| 3 | 2 | Cody BROAD | 16 | TauntonDeane | 4:42.70 |
| 4 | 3 | Sara MAZZEO | 16 | Carn Brea | 4:42.32 |
| 5 | 4 | Rosie HOLLAND | 15 | Mt Kelly | 4:42.00 |
| 6 | 5 | Rhiannon BOWEN | 15 | Aquae Sulis | 4:41.70 |
| 7 | 6 | Hannah CROKER | 15 | Aquae Sulis | 4:41.50 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 2 | 7 | Zoe GANNAWAY | 16 | Bourmth Coll | 4:41.40 |
| 3 | 8 | Alexandra WITHEY | 17 | Co Bristol | 4:41.20 |
| 4 | 9 | India COOPER | 17 | Street | 4:40.20 |
| 5 | 10 | Summer WHITELEY | 18 | Barnstaple | 4:39.70 |
| 6 | 11 | Teagan-Mae GRAHAM | 15 | Poole | 4:39.50 |
| 7 | 12 | Jasmine MORONEY | 17 | Weston S M | 4:39.48 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 13 | Lauren HESSION | 15 | Mt Kelly | 4:39.30 |
| 1 | 14 | Molina SMALLEY | 18 | Plymouth Lea | 4:39.00 |
| 2 | 15 | Savannah BARMAN | 18 | S Bournem'th | 4:38.10 |
| 3 | 16 | Imogen MORONEY | 16 | Weston S M | 4:37.91 |
| 4 | 17 | Abbie GILES | 16 | Gloucester | 4:37.70 |
| 5 | 18 | Megan LEAPER | 16 | S Bournem'th | 4:37.70 |
| 6 | 19 | Georgina HARDWICK | 19 | Severnside | 4:37.20 |
| 7 | 20 | Amie BUTTLE | 19 | West Dorset | 4:36.70 |
| 8 | 21 | Alexandra SZUPLEWSKI | 18 | Caradon | 4:36.50 |
| 9 | 22 | Jasmine HOLMES | 17 | Poole | 4:33.10 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 0 | 24 | Thalia POAROS | 15 | Mt Kelly | 4:31.86 |
| 1 | 26 | Robyn EDWARDS | 18 | TauntonDeane | 4:29.80 |
| 2 | 28 | Evan KING | 17 | Weston S M | 4:26.70 |
| 3 | 30 | Jessica PODGER | 15 | Co Bristol | 4:26.19 |
| 4 | 32 | Emily CLARKE | 19 | Poole | 4:22.06 |
| 5 | 31 | Megan BOWEN | 19 | Mt Kelly | 4:25.00 |
| 6 | 29 | Sophie HALL | 18 | Gloucester | 4:26.40 |
| 7 | 27 | Laura MCNAB | 15 | Aquae Sulis | 4:29.20 |
| 8 | 25 | Lucy PEARCE | 19 | Co Bristol | 4:30.90 |
| 9 | 23 | Thea O'KEEFE | 16 | Poole | 4:32.70 |