EVENT 403 Female 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 2 | Harriet JENNINGS | 11 | Market Har | 1:55.00 |
| 3 | 4 | Amber MUIR | 10 | Rushden | 1:47.26 |
| 4 | 6 | Hannah BEEBY | 15 | Kettering | 1:45.00 |
| 5 | 5 | Emily BRATILESCU | 12 | Newport Pag | 1:46.60 |
| 6 | 3 | Martha BLAKE | 12 | Corby | 1:52.95 |
| 7 | 1 | Kaylyn PRIOR | 11 | Corby | 2:10.09 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 8 | Lilian FRENCH | 14 | Wellingboro | 1:35.60 |
| 2 | 10 | Isabelle PAWLOWSKI | 12 | Corby | 1:33.40 |
| 3 | 12 | Georgina BEEBY | 13 | Kettering | 1:32.80 |
| 4 | 14 | Elsbeth WILLIAMS | 12 | Market Har | 1:29.70 |
| 5 | 13 | Imogen LANGLEY | 13 | Rushden | 1:31.67 |
| 6 | 11 | Georgia PARKER | 13 | Market Har | 1:33.20 |
| 7 | 9 | Jessica BARRETT | 12 | Kettering | 1:34.20 |
| 8 | 7 | Amelie ARMITAGE | 11 | Leic Sharks | 1:40.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 16 | Isabelle TANNER | 15 | Corby | 1:28.16 |
| 2 | 18 | Georgia SMITH | 15 | Corby | 1:26.63 |
| 3 | 20 | Maddison WISEMAN-HAY | 16 | Corby | 1:25.63 |
| 4 | 22 | Isabelle-Mollie FLANAG | 16 | Swadlincote | 1:23.70 |
| 5 | 21 | Lucy DANDO | 18 | Corby | 1:24.42 |
| 6 | 19 | Isabella DERBYSHIRE | 11 | Co Leicester | 1:25.90 |
| 7 | 17 | Melody Mae FLANAGAN-NI | 13 | Swadlincote | 1:27.70 |
| 8 | 15 | Beth REBHAN | 13 | Corby | 1:28.60 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 24 | Faye EYTON-JONES | 15 | Corby | 1:22.70 |
| 2 | 26 | Alexa MASON | 13 | Hinckley | 1:22.20 |
| 3 | 28 | Charlotte ELLIS | 14 | Daventry | 1:20.60 |
| 4 | 30 | Imogen DODDS | 15 | Wellingboro | 1:20.30 |
| 5 | 29 | Alexa PARKER | 15 | Market Har | 1:20.60 |
| 6 | 27 | Amelia LONERGAN | 18 | Wellingboro | 1:21.80 |
| 7 | 25 | Melande BADENHORST | 13 | Corby | 1:22.60 |
| 8 | 23 | Milana MISUROVA | 15 | Rushden | 1:23.10 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 32 | Amy MCVEY | 16 | Rushden | 1:19.50 |
| 2 | 34 | Ella NEWTON | 15 | Corby | 1:18.13 |
| 3 | 36 | Tsz Yin LEUNG | 14 | Newport Pag | 1:17.50 |
| 4 | 38 | Abigail GOLYNKER | 14 | Co Leicester | 1:16.30 |
| 5 | 37 | Lily BARKER | 21 | Leic Sharks | 1:16.90 |
| 6 | 35 | Peta MORLEY | 13 | Hinckley | 1:17.74 |
| 7 | 33 | Sophia TSINONTAS | 14 | Leic Sharks | 1:19.20 |
| 8 | 31 | Alice WALLINGER | 14 | Wellingboro | 1:20.00 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 40 | Chloe POW | 16 | Rushden | 1:16.10 |
| 2 | 42 | Philippa BODEY | 13 | Co Leicester | 1:14.30 |
| 3 | 44 | Sofia REEDHA | 13 | Co Leicester | 1:12.80 |
| 4 | 46 | Lilly TAPPERN | 17 | Corby | 1:08.00 |
| 5 | 45 | Rowan WHITE | 16 | Rushden | 1:12.60 |
| 6 | 43 | Grace WINGHAM | 17 | Corby | 1:13.57 |
| 7 | 41 | Emily HEWITT | 14 | Hinckley | 1:14.50 |
| 8 | 39 | Eve BURDON | 15 | Market Har | 1:16.20 |