EVENT 403 Female 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Eva-Rose O'TOOLE | 9 | Hinckley | 2:20.00 |
| 4 | 3 | Megan BATES | 14 | Melton M'bry | 1:47.68 |
| 5 | 2 | Chloe LIGHT | 10 | Mansfield | 2:16.50 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Emmie DENIGAN | 11 | Melton M'bry | 1:46.90 |
| 2 | 6 | Lacey BROADWAY | 12 | Kettering | 1:45.40 |
| 3 | 8 | Ava THURSTON | 14 | Corby | 1:40.01 |
| 4 | 10 | Willow HIBBITT | 10 | Melton M'bry | 1:34.23 |
| 5 | 9 | Lily FULFORD | 13 | Daventry | 1:35.00 |
| 6 | 7 | Meredith HUNT | 11 | Melton M'bry | 1:44.47 |
| 7 | 5 | Matilda JOHNSON | 14 | Kettering | 1:46.13 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 12 | Amber MUIR | 11 | Rushden | 1:31.13 |
| 2 | 14 | Evie FOWKES | 15 | Wellingboro | 1:28.00 |
| 3 | 16 | Amelia HEATHERINGTON | 13 | Daventry | 1:27.00 |
| 4 | 18 | Bella GIPSON | 12 | Corby | 1:25.14 |
| 5 | 17 | Elena SIMMONS | 14 | Co Cambridge | 1:26.55 |
| 6 | 15 | Poppy OKEIFE | 12 | Daventry | 1:27.40 |
| 7 | 13 | Sofia ILE | 15 | Kettering | 1:30.27 |
| 8 | 11 | Olive COPPA | 13 | Corby | 1:31.18 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 20 | Frankie LAMONT | 16 | Kettering | 1:24.83 |
| 2 | 22 | Jasmine REYNOLDS | 15 | Rushden | 1:22.30 |
| 3 | 24 | Isabelle TANNER | 16 | Corby | 1:21.78 |
| 4 | 26 | Ashley JONES | 19 | Wellingboro | 1:21.35 |
| 5 | 25 | Georgina BEEBY | 14 | Kettering | 1:21.65 |
| 6 | 23 | Emma AFFLECK | 14 | Kettering | 1:22.00 |
| 7 | 21 | Emma BREAG | 16 | Melton M'bry | 1:22.69 |
| 8 | 19 | Erin BAILEY | 15 | Market Har | 1:25.07 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 28 | Georgia PARKER | 14 | Corby | 1:21.05 |
| 2 | 30 | Aimee FRASER | 16 | Hinckley | 1:19.60 |
| 3 | 32 | Martha BOOKER | 13 | Wellingboro | 1:17.84 |
| 4 | 34 | Katie PICKFORD | 17 | Kettering | 1:17.64 |
| 5 | 33 | S WILLIAMS-BROWN | 12 | Market Har | 1:17.70 |
| 6 | 31 | Elsie BALDWIN | 11 | Hinckley | 1:18.70 |
| 7 | 29 | Riley WEBER | 11 | Corby | 1:21.04 |
| 8 | 27 | Hannah CHADWICK | 15 | Daventry | 1:21.32 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 36 | Eleanor GREEN | 13 | Kettering | 1:17.00 |
| 2 | 38 | Charlotte ELLIS | 15 | Daventry | 1:15.20 |
| 3 | 40 | Elisa GIRAUD | 13 | Corby | 1:12.50 |
| 4 | 42 | Alice STREETER | 19 | Market Har | 1:10.26 |
| 5 | 41 | Ella NEWTON | 15 | Corby | 1:11.70 |
| 6 | 39 | Poppy BLOWFIELD | 15 | Corby | 1:14.20 |
| 7 | 37 | Alexa PARKER | 16 | Corby | 1:15.23 |
| 8 | 35 | Sophie BRUTNALL | 14 | Market Har | 1:17.33 |