EVENT 207 Female 09/Over 50m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 2 | Lyla ELLIS | 9 | Louth | 1:10.00 |
| 3 | 4 | Abigail TAYLOR | 10 | Grantham | 1:05.68 |
| 4 | 6 | Lenorah MISIUDA | 10 | Melton M'bry | 1:04.63 |
| 5 | 5 | Trixie CHEUNG | 10 | Grantham | 1:05.00 |
| 6 | 3 | Evangeline KINNEAR | 10 | Grantham | 1:08.05 |
| 7 | 1 | Florence WEBB | 9 | Louth | 1:20.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 8 | Florence HARPER | 11 | Grantham | 59.20 |
| 2 | 10 | Elspeth MASON-SMITH | 10 | Louth | 58.09 |
| 3 | 12 | Elisabeth KINNEAR | 14 | Grantham | 54.89 |
| 4 | 15 | Erin MELLER | 10 | Louth | 53.26 |
| 5 | 14 | Willow HIBBITT | 9 | Melton M'bry | 53.35 |
| 6 | 11 | Annabel HILLSON | 9 | Grantham | 55.00 |
| 7 | 9 | Honey FLOWER | 9 | Grantham | 58.65 |
| 8 | 7 | Emily CLAYTON | 10 | Grantham | 1:03.87 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Olivia CHARITY | 12 | Grantham | 50.21 |
| 2 | 19 | Hollie-Anne CROOK | 10 | Grantham | 49.53 |
| 3 | 21 | Mia JONES | 11 | March | 49.00 |
| 4 | 23 | Paris CABORN | 11 | Louth | 46.62 |
| 5 | 22 | Ella KHAMA | 10 | Grantham | 47.39 |
| 6 | 20 | Zuzanna ZANIEWSKA | 16 | Boston | 49.09 |
| 7 | 18 | Amelie JOHNSTONE | 10 | Newark | 49.63 |
| 8 | 16 | Kara HARRITY | 9 | Melton M'bry | 52.58 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 25 | Helena HAMILTON | 12 | Grantham | 45.65 |
| 2 | 27 | Florence SHEPHERD | 12 | Gainsborough | 44.98 |
| 3 | 29 | Harriet FEAVIOUR | 9 | March | 44.34 |
| 4 | 31 | Ruby NISBET | 10 | Grantham | 43.54 |
| 5 | 30 | Abbey HURST-YATES | 13 | Newark | 43.86 |
| 6 | 28 | Ana BASCARAU | 11 | Boston | 44.51 |
| 7 | 26 | Courtney GOWLING | 13 | Skegness | 45.12 |
| 8 | 24 | Amelie MORRIS | 12 | Boston | 46.58 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 33 | Eden DYSON | 12 | Grantham | 42.80 |
| 2 | 35 | Charlotte JAY | 11 | Grantham | 42.47 |
| 3 | 37 | Ava-Grace GREGORY | 12 | Grantham | 42.42 |
| 4 | 39 | Izabella ZANIEWSKA | 11 | Boston | 42.16 |
| 5 | 38 | Isabelle CLAYTON | 11 | Grantham | 42.29 |
| 6 | 36 | Poppy HATHWAY | 12 | Grantham | 42.46 |
| 7 | 34 | Sienna MERCER | 12 | Melton M'bry | 42.66 |
| 8 | 32 | Isla-Rose WILDISH | 10 | Retford | 43.30 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 41 | Ellie ROSE | 14 | Grantham | 41.54 |
| 2 | 43 | Abbie MACKIE | 14 | March | 40.57 |
| 3 | 45 | Jane BEECH | 14 | Melton M'bry | 40.14 |
| 4 | 47 | Ella HE | 11 | Gainsborough | 39.78 |
| 5 | 46 | Kitty PAYNE | 13 | March | 39.80 |
| 6 | 44 | Sophie SHARPE | 13 | Melton M'bry | 40.50 |
| 7 | 42 | Lexie SHEWAN | 13 | Grantham | 41.13 |
| 8 | 40 | Octavia SHEARN | 11 | Grantham | 41.62 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 49 | Nyah SCOTT | 11 | March | 39.59 |
| 2 | 51 | Eva FIRTH | 15 | Melton M'bry | 39.41 |
| 3 | 53 | Alicia-Rose OSWIN | 16 | Boston | 38.59 |
| 4 | 55 | Niamh O'DONOGHUE | 12 | March | 37.12 |
| 5 | 54 | Vilte ROPEIKAITE | 15 | Boston | 37.57 |
| 6 | 52 | Lucy ABBOTT | 12 | Grantham | 38.72 |
| 7 | 50 | Mia PARAPIJONAVICIUTE | 15 | Grantham | 39.58 |
| 8 | 48 | Lucy BARRATT | 11 | Gainsborough | 39.69 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 57 | Isobel ALLSOP | 14 | Grantham | 36.74 |
| 2 | 59 | Annie WEBSTER | 12 | Grantham | 36.61 |
| 3 | 61 | Maya GLASSFORD | 13 | Melton M'bry | 36.53 |
| 4 | 63 | Lucy WILLATTS | 12 | Grantham | 36.20 |
| 5 | 62 | Erin NORTON | 13 | Boston | 36.31 |
| 6 | 60 | Megan RUTT | 14 | Boston | 36.56 |
| 7 | 58 | Juliette KING | 12 | Grantham | 36.63 |
| 8 | 56 | Lizzy LERESCHE HANDS | 12 | Grantham | 37.10 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 65 | Jessica - Rose DAVISON | 14 | Grantham | 35.85 |
| 2 | 67 | Yasmine WAITE | 14 | March | 35.74 |
| 3 | 69 | Isabelle MCCORKELL | 16 | Gainsborough | 35.58 |
| 4 | 71 | Ivy BROWN | 12 | Melton M'bry | 34.91 |
| 5 | 70 | Grace HOWITT | 15 | Grantham | 34.96 |
| 6 | 68 | Milen MERRITT | 12 | Melton M'bry | 35.68 |
| 7 | 66 | Amelia BIRD | 13 | Skegness | 35.77 |
| 8 | 64 | Emilija IVANOVA | 15 | Boston | 35.85 |
| Heat Number - 10 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 74 | Harriet MCCORMACK | 14 | Grantham | 34.08 |
| 2 | 76 | Annabelle JAY | 12 | Grantham | 33.60 |
| 3 | 78 | Alisha TYERS | 23 | Grantham | 31.91 |
| 4 | 80 | Evie TURNER | 18 | Grantham | 30.60 |
| 5 | 79 | Ellena HOWITT | 13 | Grantham | 31.30 |
| 6 | 77 | Sophie WARD | 14 | Grantham | 33.20 |
| 7 | 75 | Darcey WOOD | 12 | Grantham | 33.81 |
| 8 | 72 | Amy TAYLOR | 13 | Grantham | 34.30 |