EVENT 105 Female 12 /Under 50m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Maya PASCAN | 12 | Deepings | |
| 2 | 3 | Sophie ALLISTON | 12 | Deepings | |
| 3 | 4 | A HATCHER BRENNAN | 9 | Deepings | |
| 4 | 5 | Iona BREWSTER | 10 | Deepings | |
| 5 | 6 | Olivia LEVERTON | 10 | Co Lincoln P | 1:15.00 |
| 6 | 7 | Ava MORGAN | 10 | Co Lincoln P | 1:15.00 |
| 7 | 8 | Abigail WORTHINGTON | 10 | Lincoln Vulc | 1:09.88 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 9 | Evangeline KINNEAR | 10 | Grantham | 1:08.31 |
| 2 | 10 | Isla ROBINSON | 10 | Co Lincoln P | 1:07.69 |
| 3 | 11 | Esme SOUTHWICK | 11 | Lincoln Vulc | 1:07.63 |
| 4 | 12 | Ruby CLARK | 11 | Lincoln Vulc | 1:05.00 |
| 5 | 13 | Amaya MONTEALEGRE | 10 | Lincoln Vulc | 1:05.00 |
| 6 | 14 | Merryn JOHNSON-ROOK | 11 | Lincoln Vulc | 1:05.00 |
| 7 | 15 | Laura LOVETT | 11 | Co Lincoln P | 1:05.00 |
| 8 | 16 | Eva REDMILE | 9 | Lincoln Vulc | 1:05.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Niamh KERRIGAN | 10 | Co Lincoln P | 1:04.72 |
| 2 | 19 | Amelie HUNT | 10 | Deepings | 1:03.96 |
| 3 | 20 | Aoife HICKEY | 9 | Deepings | 1:01.97 |
| 4 | 21 | Ella-Rose HUNTER | 11 | Lincoln Vulc | 1:01.78 |
| 5 | 22 | Millie MACKIE | 11 | Co Lincoln P | 1:01.73 |
| 6 | 23 | Katie BEASTALL | 10 | Co Lincoln P | 1:01.12 |
| 7 | 24 | Emily CLAYTON | 9 | Grantham | 1:01.11 |
| 8 | 25 | Juliette KIM | 9 | Grantham | 1:00.72 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 26 | Matilda MCDONNELL | 11 | Grantham | 1:00.20 |
| 2 | 27 | Ava GREIG | 11 | Lincoln Vulc | 1:00.00 |
| 3 | 28 | Florence HARPER | 11 | Grantham | 1:00.00 |
| 4 | 29 | Francesca MORGAN | 11 | Grantham | 1:00.00 |
| 5 | 30 | Olivia CHARITY | 12 | Grantham | 59.95 |
| 6 | 31 | Abigail TAYLOR | 10 | Grantham | 59.48 |
| 7 | 32 | Amelia BELL | 12 | Lincoln Vulc | 59.45 |
| 8 | 33 | Hannah NORTH | 10 | Lincoln Vulc | 59.18 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 34 | Madeline SURTEES | 11 | Grantham | 58.76 |
| 2 | 35 | Evangeline CHRISPIN | 12 | Lincoln Vulc | 58.63 |
| 3 | 36 | Annabel HILLSON | 9 | Grantham | 58.00 |
| 4 | 37 | Hollie-Ann CROOK | 9 | Grantham | 57.58 |
| 5 | 38 | Evie SKILLINGTON | 12 | Lincoln Vulc | 57.03 |
| 6 | 39 | Elise HEMMINGS | 10 | Lincoln Vulc | 56.84 |
| 7 | 40 | Amy BARKER | 10 | Lincoln Vulc | 56.67 |
| 8 | 41 | Sophie PERKINS | 12 | Deepings | 56.32 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 42 | Catherine SINCLAIR | 11 | Co Lincoln P | 56.04 |
| 2 | 43 | Connie PITTS | 12 | Lincoln Vulc | 55.09 |
| 3 | 44 | Bella HARLEY | 10 | Co Lincoln P | 55.00 |
| 4 | 46 | Isabella TRAGNI | 11 | Co Lincoln P | 54.91 |
| 5 | 47 | Sophie OWEN | 12 | Lincoln Vulc | 54.74 |
| 6 | 48 | Jessica WYTHE | 12 | Co Lincoln P | 54.61 |
| 7 | 51 | Caitlynn EDMEADES | 10 | Deepings | 53.69 |
| 8 | 52 | Millie EDWARDS | 11 | Deepings | 53.49 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 53 | Eden DYSON | 12 | Grantham | 53.09 |
| 2 | 54 | Ava CUTTS | 12 | Co Lincoln P | 52.66 |
| 3 | 56 | Connie MILLNS | 12 | Co Lincoln P | 52.02 |
| 4 | 57 | Angelina BALLARD | 12 | Co Lincoln P | 52.01 |
| 5 | 58 | Arin ELVIDGE | 10 | Lincoln Vulc | 52.00 |
| 6 | 59 | Isabelle CLAYTON | 11 | Grantham | 51.63 |
| 7 | 60 | Annabel SHEPHERD | 11 | Deepings | 51.45 |
| 8 | 61 | Alice MCMASTER | 12 | Lincoln Vulc | 51.25 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 62 | Scarlett HART | 12 | Co Lincoln P | 50.44 |
| 2 | 63 | Ava-Grace GREGORY | 12 | Grantham | 50.26 |
| 3 | 64 | Charlotte WELGEMOED | 12 | Co Lincoln P | 50.21 |
| 4 | 65 | Ella Bele KHAMA | 10 | Grantham | 50.04 |
| 5 | 66 | Helena HAMILTON | 12 | Grantham | 49.91 |
| 6 | 67 | Evie NEWMAN | 11 | Lincoln Vulc | 49.58 |
| 7 | 68 | Octavia SHEARN | 11 | Grantham | 49.32 |
| 8 | 69 | Charlotte JAY | 11 | Grantham | 48.93 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 70 | Robyn STEEL | 10 | Co Lincoln P | 48.33 |
| 2 | 71 | Florence HENDERSON | 11 | Lincoln Vulc | 47.93 |
| 3 | 72 | Freya SHARPE | 11 | Lincoln Vulc | 46.93 |
| 4 | 73 | Miley RICHARDSON | 10 | Co Lincoln P | 46.74 |
| 5 | 74 | Olivia KING | 12 | Deepings | 46.06 |
| 6 | 75 | Lucy ABBOTT | 12 | Grantham | 46.04 |
| 7 | 76 | Lucy JENKINSON | 12 | Deepings | 45.43 |
| 8 | 77 | Imogen ROTHWELL | 12 | Co Lincoln P | 45.41 |
| Heat Number - 10 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 79 | Remi BERRY | 11 | Co Lincoln P | 44.76 |
| 2 | 81 | Molly CRAUGHAN | 12 | Lincoln Vulc | 43.16 |
| 3 | 83 | Amy TAYLOR | 12 | Grantham | 42.44 |
| 4 | 85 | Darcey WOOD | 12 | Grantham | 42.02 |
| 5 | 84 | Ellena HOWITT | 12 | Grantham | 42.34 |
| 6 | 82 | Lucy WILLATTS | 12 | Grantham | 42.45 |
| 7 | 80 | Annabelle JAY | 12 | Grantham | 43.84 |
| 8 | 78 | E LERESCHE HANDS | 12 | Grantham | 45.34 |