EVENT 302 Female 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Sofia WILLIAMS | 9 | Corby | 2:45.01 |
| 4 | 3 | Juliet LONG | 10 | Wellingboro | 2:23.00 |
| 5 | 2 | Esme LEE | 9 | Wellingboro | 2:26.67 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Alice TOWNEND | 10 | Hinckley | 2:12.00 |
| 2 | 7 | Ella LEGG | 9 | Wellingboro | 2:11.00 |
| 3 | 9 | Zosia HOLT | 12 | Rushden | 2:09.30 |
| 4 | 11 | Merryn FULFORD | 11 | Daventry | 2:03.65 |
| 5 | 10 | Keira BUNCE | 10 | Rushden | 2:05.11 |
| 6 | 8 | Olivia MITCHELL | 12 | Melton M'bry | 2:10.10 |
| 7 | 6 | Eva-Rose O'TOOLE | 9 | Hinckley | 2:11.07 |
| 8 | 4 | Jessica BLENKHORN | 10 | Wellingboro | 2:16.90 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 13 | Caitlin AUGUSTUS | 13 | Kettering | 2:02.07 |
| 2 | 15 | Elsie BAILEY | 10 | Kettering | 2:00.00 |
| 3 | 17 | Natasha SHARPE | 11 | Melton M'bry | 1:57.80 |
| 4 | 19 | Freya TRILK | 13 | Rushden | 1:56.09 |
| 5 | 18 | Macie LEGG | 13 | Wellingboro | 1:57.20 |
| 6 | 16 | Evie LEWIS-COX | 10 | Nene Valley | 1:58.80 |
| 7 | 14 | Ava THURSTON | 14 | Corby | 2:00.01 |
| 8 | 12 | Kara HARRITY | 10 | Melton M'bry | 2:03.29 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 21 | Lily MUIR | 9 | Rushden | 1:55.11 |
| 2 | 23 | Ella HURREN | 12 | Rushden | 1:53.46 |
| 3 | 25 | Oliwia ZAWORSKA-BENEDY | 13 | Corby | 1:50.97 |
| 4 | 27 | Eva MUTCH | 13 | Daventry | 1:48.10 |
| 5 | 26 | Sophie MARSHALL | 12 | Corby | 1:49.72 |
| 6 | 24 | Isabella GERRETT | 11 | Rushden | 1:51.01 |
| 7 | 22 | Emma CHAMBERLAIN | 12 | Wellingboro | 1:54.46 |
| 8 | 20 | Emily BLENKHORN | 12 | Wellingboro | 1:55.94 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 29 | Violet FRENCH | 12 | Wellingboro | 1:46.40 |
| 2 | 31 | Esme SMITH | 12 | Corby | 1:45.72 |
| 3 | 33 | Cordelia REED | 11 | Melton M'bry | 1:45.10 |
| 4 | 35 | Olive COPPA | 13 | Corby | 1:44.05 |
| 5 | 34 | Jessica KEMP | 11 | Wellingboro | 1:44.36 |
| 6 | 32 | Rosie BROOKER | 12 | Melton M'bry | 1:45.10 |
| 7 | 30 | Lacey BROADWAY | 12 | Kettering | 1:45.91 |
| 8 | 28 | Isabelle CSIBI | 11 | Rushden | 1:47.78 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 37 | Daisy HARTNETT | 11 | Hinckley | 1:42.19 |
| 2 | 39 | M PLAKOGIANNI | 14 | Kettering | 1:41.61 |
| 3 | 41 | Isabelle TANNER | 16 | Corby | 1:41.50 |
| 4 | 43 | Willow HIBBITT | 10 | Melton M'bry | 1:40.11 |
| 5 | 42 | Lucie PRESTON | 15 | Corby | 1:41.20 |
| 6 | 40 | Elsbeth WILLIAMS | 13 | Market Har | 1:41.60 |
| 7 | 38 | Hannah CHADWICK | 15 | Daventry | 1:42.06 |
| 8 | 36 | Ellie SMITH | 13 | Corby | 1:43.48 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 45 | Ella FAIRBAIRN | 14 | Kettering | 1:40.00 |
| 2 | 47 | Lily FULFORD | 13 | Daventry | 1:39.42 |
| 3 | 49 | Mara RIZAC | 14 | Kettering | 1:38.03 |
| 4 | 51 | Imogen BURGER | 15 | Corby | 1:36.69 |
| 5 | 50 | Jasmin DODDS | 13 | Wellingboro | 1:37.88 |
| 6 | 48 | Jasmine REYNOLDS | 15 | Rushden | 1:38.40 |
| 7 | 46 | Everly FAVIER | 12 | Wellingboro | 1:40.00 |
| 8 | 44 | Sofia ILE | 15 | Kettering | 1:40.02 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 53 | Megan JAMES | 12 | Wellingboro | 1:36.20 |
| 2 | 55 | Neve BOOKER | 13 | Wellingboro | 1:34.79 |
| 3 | 57 | Nika BUHHAROVA | 15 | Corby | 1:34.33 |
| 4 | 59 | Frankie LAMONT | 16 | Kettering | 1:33.90 |
| 5 | 58 | Olivia HAJO | 14 | Corby | 1:34.04 |
| 6 | 56 | Eleni WILLIAMS | 12 | Corby | 1:34.45 |
| 7 | 54 | Addyson HICKS | 11 | Corby | 1:36.10 |
| 8 | 52 | Hallie MCALINDON | 16 | Kettering | 1:36.40 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 61 | Madeleine WATTS | 15 | Kettering | 1:33.44 |
| 2 | 63 | S WILLIAMS-BROWN | 12 | Market Har | 1:30.62 |
| 3 | 65 | Sophie SHARPE | 15 | Melton M'bry | 1:29.84 |
| 4 | 67 | Georgia SMITH | 16 | Corby | 1:29.70 |
| 5 | 66 | Amber MUIR | 11 | Rushden | 1:29.80 |
| 6 | 64 | Catrin BAILEY | 16 | Corby | 1:30.30 |
| 7 | 62 | Sophie BRUTNALL | 14 | Market Har | 1:31.13 |
| 8 | 60 | Georgina BEEBY | 14 | Kettering | 1:33.86 |
| Heat Number - 10 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 69 | Georgia PARKER | 14 | Corby | 1:28.70 |
| 2 | 71 | Jessica BARRETT | 13 | Kettering | 1:28.40 |
| 3 | 73 | Chloe PERKINS | 14 | Kettering | 1:26.71 |
| 4 | 75 | Evie BRAMFORD | 14 | Hinckley | 1:26.12 |
| 5 | 74 | Ruby CUMMINS | 20 | Wellingboro | 1:26.29 |
| 6 | 72 | Evie REAMSBOTTOM | 15 | Daventry | 1:26.85 |
| 7 | 70 | Emma BREAG | 16 | Melton M'bry | 1:28.50 |
| 8 | 68 | Harriet JENNINGS | 12 | Market Har | 1:29.31 |
| Heat Number - 11 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 77 | Saxon SWANN | 14 | Corby | 1:25.90 |
| 2 | 79 | Evelyn COPPA | 15 | Corby | 1:23.91 |
| 3 | 81 | Beth REBHAN | 13 | Corby | 1:20.28 |
| 4 | 83 | Alice STREETER | 19 | Market Har | 1:18.13 |
| 5 | 82 | Alexa PARKER | 16 | Corby | 1:19.19 |
| 6 | 80 | Hannah MARSDEN | 15 | Daventry | 1:22.85 |
| 7 | 78 | Jane BEECH | 15 | Melton M'bry | 1:25.56 |
| 8 | 76 | Kennedy MCHUGH | 14 | Corby | 1:25.99 |