EVENT 19 Female 50m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Lily MCCORMICK | 9 | Lincoln TSA | 1:20.00 |
| 3 | 2 | Florence MCCLURE | 10 | Lincoln TSA | 1:10.06 |
| 4 | 3 | Holly SOUTHWICK | 10 | Lincoln TSA | 1:10.00 |
| 5 | 4 | Nina KOZIOL | 11 | Lincoln TSA | 1:08.91 |
| 6 | 5 | Dixie DITCHBURN | 11 | Grantham | 1:07.10 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | Imola HARRIS | 9 | Grantham | 1:06.12 |
| 2 | 7 | Elsie WENTWORTH | 11 | Lincoln Vulc | 1:04.71 |
| 3 | 8 | Penelope WILKINSON | 11 | Grantham | 1:04.00 |
| 4 | 9 | Seren TWINLEY | 10 | Deepings | 1:03.33 |
| 5 | 10 | Bella COLEMAN | 10 | Gainsborough | 1:02.80 |
| 6 | 11 | Bethany MEAKIN | 11 | Grantham | 1:02.58 |
| 7 | 12 | Elizabeth GARLICK | 10 | Louth | 1:01.93 |
| 8 | 13 | Sophia WRIGHT | 10 | Grantham | 1:00.93 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 14 | Lillian ROBSON | 11 | Lincoln Vulc | 1:00.04 |
| 2 | 15 | Jemima-Blu BRENNAN | 9 | Gainsborough | 1:00.00 |
| 3 | 16 | Leela-Mya EDWARDS | 11 | Gainsborough | 58.24 |
| 4 | 17 | Lillie FIELD | 10 | Louth | 57.94 |
| 5 | 18 | Megan PERKIN | 11 | Lincoln Vulc | 57.39 |
| 6 | 19 | Matilda HARPER | 10 | Grantham | 57.38 |
| 7 | 20 | Lily MULCAHY | 13 | Lincoln Vulc | 56.87 |
| 8 | 21 | Holly LLOYD | 11 | Louth | 55.82 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 22 | Jessica DAVISON | 12 | Louth | 55.59 |
| 2 | 23 | Elsie WOOD | 9 | Louth | 55.57 |
| 3 | 24 | Francesca BROWNLESS | 10 | Lincoln TSA | 54.41 |
| 4 | 25 | Annabelle SEAGROATT | 10 | Louth | 54.40 |
| 5 | 26 | Ginny PARNHAM | 11 | Lincoln Vulc | 54.16 |
| 6 | 27 | Helena MCLAUGHLIN | 12 | Louth | 53.84 |
| 7 | 28 | Evie SKILLINGTON | 14 | Lincoln Vulc | 53.47 |
| 8 | 29 | Elsa STEVENSON | 10 | Lincoln Vulc | 53.28 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 30 | Edith TEMPLEMAN | 9 | Louth | 53.24 |
| 2 | 31 | Amelie HUNT | 12 | Deepings | 53.16 |
| 3 | 32 | Suzuki CARTER | 11 | Skegness | 53.07 |
| 4 | 33 | Skye WARREN | 12 | Lincoln TSA | 53.00 |
| 5 | 34 | Jessica REEVES | 12 | Lincoln Vulc | 52.10 |
| 6 | 35 | Merryn JOHNSON-ROOK | 13 | Lincoln Vulc | 52.05 |
| 7 | 36 | Kaylee HEMMINGS | 11 | Lincoln Vulc | 51.89 |
| 8 | 37 | Esmé EVANS | 12 | Grantham | 51.78 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 38 | Poppy BRODIE | 13 | Grantham | 51.77 |
| 2 | 39 | Martha WOOD | 9 | Grantham | 51.40 |
| 3 | 40 | Darcie BOLES | 12 | Gainsborough | 51.27 |
| 4 | 41 | Ava LEON-BURTON | 12 | Lincoln Vulc | 51.25 |
| 5 | 42 | Lily HALE | 11 | Skegness | 50.07 |
| 6 | 43 | Maia PAIGE | 14 | Deepings | 50.00 |
| 7 | 44 | Evelyn NICHOLLS | 12 | Grantham | 49.98 |
| 8 | 45 | Freya COPCUTT | 15 | Lincoln Vulc | 49.98 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 46 | Abigail WORTHINGTON | 12 | Lincoln Vulc | 49.93 |
| 2 | 47 | Florence WEBB | 11 | Louth | 49.47 |
| 3 | 48 | C TOH-GRUDZINSKI | 9 | Lincoln Vulc | 49.47 |
| 4 | 49 | Eleanor DE ROSE | 11 | Deepings | 49.18 |
| 5 | 50 | Sophie HARRISON | 15 | Deepings | 49.13 |
| 6 | 51 | Lucy MARTIN | 10 | Lincoln Vulc | 48.90 |
| 7 | 52 | Rosie JONES | 15 | Deepings | 48.55 |
| 8 | 53 | Amaya MONTEALEGRE | 12 | Lincoln Vulc | 48.49 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 54 | Abigail TAYLOR | 12 | Grantham | 48.20 |
| 2 | 55 | Chloe GOACHER | 12 | Grantham | 48.18 |
| 3 | 56 | Alicja ODROBINSKA | 13 | Deepings | 48.00 |
| 4 | 57 | Michelle ZOLDOWICZ | 13 | Lincoln TSA | 48.00 |
| 5 | 58 | Sophie HODSON | 15 | Deepings | 48.00 |
| 6 | 59 | Jasmine CHEETHAM | 12 | Lincoln Vulc | 47.67 |
| 7 | 60 | Juliette KING | 14 | Grantham | 47.04 |
| 8 | 61 | Annabel HILLSON | 11 | Grantham | 46.97 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 62 | Thea WHOTTON | 13 | Louth | 46.75 |
| 2 | 63 | Francesca WESTON | 11 | Grantham | 46.31 |
| 3 | 64 | Ava-Grace GREGORY | 14 | Grantham | 46.24 |
| 4 | 65 | Jessica SPECK | 15 | Lincoln Vulc | 46.24 |
| 5 | 66 | Charlotte BROWNLESS | 14 | Lincoln TSA | 46.18 |
| 6 | 67 | Maisie DARBY | 15 | Lincoln Vulc | 46.10 |
| 7 | 68 | Caitlin BOWLES | 12 | Gainsborough | 45.73 |
| 8 | 69 | Freya BOWLES | 14 | Gainsborough | 45.57 |
| Heat Number - 10 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 70 | Octavia SHEARN | 13 | Grantham | 45.44 |
| 2 | 71 | Florence HARPER | 13 | Grantham | 45.40 |
| 3 | 72 | Emilija IVANOVA | 17 | Boston | 45.36 |
| 4 | 73 | Sophie OWEN | 14 | Lincoln Vulc | 45.32 |
| 5 | 74 | Evie DAVIES | 13 | Deepings | 44.90 |
| 6 | 75 | Olivia PRECIOUS | 17 | Gainsborough | 44.67 |
| 7 | 76 | Hollie-Ann CROOK | 11 | Grantham | 44.64 |
| 8 | 77 | Madeline SURTEES | 13 | Grantham | 44.42 |
| Heat Number - 11 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 78 | Aoife HICKEY | 11 | Deepings | 44.29 |
| 2 | 79 | Amy BARKER | 12 | Lincoln Vulc | 44.16 |
| 3 | 80 | Honey FLOWER | 11 | Grantham | 43.96 |
| 4 | 81 | Arin ELVIDGE | 12 | Lincoln Vulc | 43.90 |
| 5 | 82 | Ekaterina KARUBOVA | 14 | Lincoln Vulc | 43.80 |
| 6 | 83 | Isabelle CLAYTON | 13 | Grantham | 43.47 |
| 7 | 84 | Ella-Rose HUNTER | 13 | Lincoln Vulc | 43.35 |
| 8 | 85 | Annabel SHEPHERD | 13 | Deepings | 43.25 |
| Heat Number - 12 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 86 | Robyn CROSS | 13 | Lincoln Vulc | 43.04 |
| 2 | 87 | Caitlin CROSS | 13 | Lincoln Vulc | 42.88 |
| 3 | 88 | Ava MACKFALL | 15 | Lincoln Vulc | 42.01 |
| 4 | 89 | Jessica - Rose DAVISON | 16 | Grantham | 41.99 |
| 5 | 90 | Caitlynn EDMEADES | 12 | Deepings | 41.89 |
| 6 | 91 | Martha PIERCEY | 15 | Skegness | 41.27 |
| 7 | 92 | Ella HE | 13 | Gainsborough | 41.20 |
| 8 | 93 | Madeleine SEAGROATT | 13 | Louth | 41.01 |
| Heat Number - 13 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 94 | Sophie FOSTER | 15 | Louth | 40.98 |
| 2 | 95 | Arabella PEARCE | 13 | Louth | 40.73 |
| 3 | 96 | Ella KHAMA | 12 | Grantham | 40.61 |
| 4 | 97 | Sally NORMAN | 38 | Boston | 40.39 |
| 5 | 98 | Grace HOWITT | 17 | Grantham | 40.21 |
| 6 | 99 | Poppy CHAPMAN | 14 | Louth | 40.18 |
| 7 | 100 | Darcey WOOD | 14 | Grantham | 39.65 |
| 8 | 101 | Luiza KOZIOL | 17 | Lincoln TSA | 38.72 |
| Heat Number - 14 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 103 | Margot MARKS | 12 | Lincoln Vulc | 38.50 |
| 2 | 105 | Mia PARAPIJONAVICIUTE | 17 | Grantham | 38.10 |
| 3 | 107 | Annabelle JAY | 14 | Grantham | 36.98 |
| 4 | 109 | Chloe DAYBELL | 21 | Grantham | 33.07 |
| 5 | 108 | Suzanna BURKE | 14 | Louth | 35.31 |
| 6 | 106 | Amy TAYLOR | 14 | Grantham | 37.90 |
| 7 | 104 | Olivia KING | 14 | Deepings | 38.43 |
| 8 | 102 | Zoe JONES | 13 | Louth | 38.69 |