EVENT 314 Girls Open 400m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 1 | Molly PAXTON | 12 | South Lincs | 7:45.76 |
| 2 | 3 | Cordelia BARBER | 12 | South Lincs | 7:16.57 |
| 3 | 5 | Esther SKELLS | 12 | South Lincs | 6:41.32 |
| 4 | 7 | Andre UBAVICIUTE | 12 | South Lincs | 6:23.64 |
| 5 | 6 | Emma WILDE | 13 | Deepings | 6:33.44 |
| 6 | 4 | Francesca PALFREY | 10 | Loughborough | 7:05.67 |
| 7 | 2 | Tiggy VANN | 10 | Co Leicester | 7:19.25 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 9 | Lily JACKSON-OATES | 11 | Arnold | 6:19.20 |
| 2 | 11 | Alisha PORTER | 17 | Shrewsbury | 6:05.88 |
| 3 | 13 | Alicia KNIGHT | 15 | Leic Peng | 5:44.10 |
| 4 | 15 | Hannah WILLIS | 11 | South Lincs | 5:36.52 |
| 5 | 14 | Heidi MARRIOTT | 11 | Mansfield | 5:39.40 |
| 6 | 12 | Holly STUBBS | 13 | Leic Peng | 5:58.04 |
| 7 | 10 | Anya STRICKLAND | 10 | South Lincs | 6:07.59 |
| 8 | 8 | Clair GREEN | 13 | Shrewsbury | 6:23.40 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 17 | Matilda STRANGE | 12 | Co Leicester | 5:31.52 |
| 2 | 19 | Ellisha COOKSON | 12 | South Lincs | 5:26.42 |
| 3 | 21 | Daisy ROBSON-JONES | 12 | Co Leicester | 5:19.16 |
| 4 | 23 | Natalie SMITH | 15 | Deepings | 5:17.31 |
| 5 | 22 | Amelia FOVARGUE | 13 | South Lincs | 5:17.60 |
| 6 | 20 | Evie STUBBS | 15 | Leic Peng | 5:23.22 |
| 7 | 18 | Zara GRAHAM | 13 | Shrewsbury | 5:31.30 |
| 8 | 16 | Mollie BRIGGS | 11 | South Lincs | 5:36.18 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 25 | Ella BEARD | 13 | Nova Cent'n | 5:16.00 |
| 2 | 27 | Rosemary HARVEY | 15 | Deepings | 5:13.22 |
| 3 | 29 | Rebecca HADLEY | 12 | Co Leicester | 5:10.59 |
| 4 | 31 | Amelia BASSNETT | 13 | Nuneaton | 5:08.32 |
| 5 | 30 | Katie SHELTON | 14 | Co Leicester | 5:10.18 |
| 6 | 28 | Matilda BOOT | 14 | Bramcote | 5:11.55 |
| 7 | 26 | Livia KINGSLAND | 11 | Nova Cent'n | 5:14.60 |
| 8 | 24 | Eleanor CAPELL | 14 | Loughborough | 5:16.38 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 33 | Evie RICHARDS | 13 | Co Leicester | 5:03.59 |
| 2 | 35 | Madeleine SQUIRES | 12 | Co Leicester | 5:01.20 |
| 3 | 37 | Emma WALLACE | 14 | Deepings | 4:59.23 |
| 4 | 39 | Holly LEGGOTT | 14 | Deepings | 4:57.72 |
| 5 | 38 | Rebecca SAMANDI | 13 | Co Leicester | 4:57.79 |
| 6 | 36 | Emily WHEATLEY | 13 | Co Leicester | 4:59.53 |
| 7 | 34 | Sophie BENNION | 13 | Co Leicester | 5:02.16 |
| 8 | 32 | Grace SHORROCK | 16 | Shrewsbury | 5:06.07 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 41 | Lara SINCLAIR-BANKS | 14 | Corby | 4:54.16 |
| 2 | 43 | Abbi WHITE | 14 | Leic Sharks | 4:52.87 |
| 3 | 45 | Danielle SHLACKMAN | 17 | Deepings | 4:51.90 |
| 4 | 47 | Georgina MITCHELL | 15 | Strat Sharks | 4:50.92 |
| 5 | 46 | Melissa PUGH | 15 | Shrewsbury | 4:51.43 |
| 6 | 44 | Jasmine GOWER | 15 | Wigan BEST | 4:52.21 |
| 7 | 42 | Alexandra COOPER | 14 | Deepings | 4:52.87 |
| 8 | 40 | Jessie SPOONER | 14 | Deepings | 4:56.42 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club/Country | Time |
| 1 | 49 | Rebekah WEBSTER-AIKMAN | 18 | Leic Peng | 4:50.22 |
| 2 | 51 | Sarah CHAPMAN | 16 | Leamington | 4:47.45 |
| 3 | 53 | Kate GRINDLEY | 20 | Shrewsbury | 4:44.39 |
| 4 | 55 | Chloe JONES | 14 | Deepings | 4:40.89 |
| 5 | 54 | Gemma BAKER | 17 | South Lincs | 4:42.88 |
| 6 | 52 | Rebecca MCKENZIE | 17 | South Lincs | 4:47.36 |
| 7 | 50 | Sofia ALLEN | 16 | Chesterfield | 4:48.15 |
| 8 | 48 | Bethany WILDE | 17 | Deepings | 4:50.62 |