EVENT 211 Female 16 Yrs/Over 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 1 | Sofia Ile | 16 | | Kettering | 1:28.60 |
| 2 | 3 | Evelyn Coppa | 16 | | Corby | 1:25.32 |
| 3 | 5 | Emily Wallace | 16 | | Northampton | 1:25.00 |
| 4 | 7 | Lana Webb | 17 | | Northampton | 1:24.30 |
| 5 | 6 | Isabelle Tanner | 17 | | Corby | 1:24.90 |
| 6 | 4 | Ashley Jones | 20 | | Wellingboro | 1:25.00 |
| 7 | 2 | Marcie Blackford | 16 | | Corby | 1:27.39 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 11 | Georgia Smith | 17 | | Corby | 1:21.02 |
| 2 | 17 | Gracie Ridout | 21 | | Wellingboro | 1:17.00 |
| 3 | 23 | Chloe Pow | 18 | | Rushden | 1:14.60 |
| 4 | 29 | Rowan White | 18 | | Rushden | 1:09.42 |
| 5 | 26 | Emily Denton | 17 | | Northampton | 1:13.00 |
| 6 | 20 | Chloe Tangayi | 18 | | Northampton | 1:15.30 |
| 7 | 14 | Eva Gallagher | 17 | | Corby | 1:18.57 |
| 8 | 8 | Nika Buhharova | 16 | | Corby | 1:23.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 12 | Frankie Lamont | 17 | | Kettering | 1:20.20 |
| 2 | 18 | Charlotte Ellis | 16 | | Daventry | 1:15.80 |
| 3 | 24 | Alice Wallinger | 16 | | Wellingboro | 1:14.10 |
| 4 | 30 | Orna Lett | 16 | | Northampton | 1:07.72 |
| 5 | 27 | Alexa Parker | 17 | | Corby | 1:12.30 |
| 6 | 21 | Poppy Blowfield | 16 | | Corby | 1:15.23 |
| 7 | 15 | Megan Barber | 17 | | Kettering | 1:18.26 |
| 8 | 9 | Jasmine Reynolds | 16 | | Rushden | 1:22.90 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 13 | Ella Mae Prior | 18 | | Corby | 1:19.64 |
| 2 | 19 | Maddie Walden | 16 | | Northampton | 1:15.40 |
| 3 | 25 | Ella Newton | 17 | | Corby | 1:13.20 |
| 4 | 31 | Betsy Wizard | 23 | | Northampton | 58.70 |
| 5 | 28 | Isabel Sharp | 20 | | Northampton | 1:11.96 |
| 6 | 22 | Amber Haycock | 19 | S10 | Northampton | 1:15.10 |
| 7 | 16 | Imogen Dodds | 17 | S13 | Wellingboro | 1:17.00 |
| 8 | 10 | Hannah Chadwick | 16 | | Daventry | 1:22.30 |