EVENT 612 Women 16 Yrs/Over 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 4 | Annabel Lloyd | 16 | | Northampton | 1:33.59 |
| 2 | 10 | Ruby Cummins | 18 | | Wellingboro | 1:29.25 |
| 3 | 16 | Matilda Scotney | 16 | | Rushden | 1:24.83 |
| 4 | 22 | Grace Wingham | 16 | | Kettering | 1:19.50 |
| 5 | 19 | Charlotte Mair | 20 | | Kettering | 1:21.80 |
| 6 | 13 | Emilia Cieszczyk | 16 | | Northampton | 1:26.00 |
| 7 | 7 | Lana Giles | 16 | | Kettering | 1:31.15 |
| 8 | 1 | Amber Haycock | 16 | SB10 | Rushden | 1:37.09 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 5 | Scarlett Humphrey | 18 | SB11 | Northampton | 1:32.76 |
| 2 | 11 | Sophie Hacker | 16 | | Northampton | 1:27.96 |
| 3 | 17 | Sophia Wiffen | 18 | | Corby | 1:23.84 |
| 4 | 23 | Magenta Kenyon | 18 | | Kettering | 1:19.24 |
| 5 | 20 | Emily Batchelor | 16 | | Kettering | 1:21.34 |
| 6 | 14 | Lily Freeman | 16 | | Northampton | 1:25.68 |
| 7 | 8 | Maisie Summers-Newton | 21 | SB6 | Northampton | 1:30.80 |
| 8 | 2 | Eliza Humphrey | 18 | SB11 | Northampton | 1:35.22 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 6 | Ruby Gardiner | 18 | | Kettering | 1:32.38 |
| 2 | 12 | Kalinika Cwiklinska | 16 | | Northampton | 1:27.59 |
| 3 | 18 | Leah Hayle | 16 | | Northampton | 1:23.44 |
| 4 | 24 | Summer York | 17 | | Corby | 1:17.43 |
| 5 | 21 | Lilly Tappern | 16 | | Corby | 1:20.75 |
| 6 | 15 | Orla Eyton-Jones | 17 | | Corby | 1:25.30 |
| 7 | 9 | Lauren Kelley | 17 | | Wellingboro | 1:29.70 |
| 8 | 3 | Imogen Morlidge | 16 | | Wellingboro | 1:33.96 |