EVENT 105 Female 12 /Under 50m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Beatrix SHEPPARD | 9 | Grantham | |
| 4 | 2 | Polina KUDRIAVETS | 10 | Deepings | |
| 5 | 3 | Imola HARRIS | 9 | Grantham | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Felicity MARSHALL | 12 | Deepings | |
| 2 | 5 | Bethany MEAKIN | 11 | Grantham | |
| 3 | 6 | Harriet HOLLOWAY | 11 | Deepings | |
| 4 | 7 | Evelyn CHARITY | 9 | Grantham | |
| 5 | 8 | Georgia HUNT | 10 | Grantham | |
| 6 | 9 | Charlotte DAVIES | 10 | Deepings | |
| 7 | 10 | Chloe BERNERS | 12 | Deepings | |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Norah GIBSON | 11 | Grantham | |
| 2 | 12 | Phoebe ABLITT | 9 | Co Lincoln P | 1:30.00 |
| 3 | 13 | Sienna GREEN | 11 | Co Lincoln P | 1:22.00 |
| 4 | 14 | Freya GILLIATT | 9 | Co Lincoln P | 1:22.00 |
| 5 | 15 | Ada HUGHES | 10 | Co Lincoln P | 1:20.00 |
| 6 | 16 | Emilia BENNETT | 11 | Co Lincoln P | 1:18.15 |
| 7 | 17 | Layla MERRICK | 11 | Co Lincoln P | 1:13.39 |
| 8 | 18 | F FRASER-CATTANACH | 12 | Lincoln Vulc | 1:12.49 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 19 | Ella CARDDOCK | 12 | Co Lincoln P | 1:11.00 |
| 2 | 20 | Elsie WENTWORTH | 11 | Lincoln Vulc | 1:10.56 |
| 3 | 21 | Tabitha LAMBERT | 10 | Lincoln Vulc | 1:10.41 |
| 4 | 23 | Martha WILLIAMS | 9 | Lincoln Vulc | 1:09.41 |
| 5 | 24 | Charlotte BERRY | 11 | Co Lincoln P | 1:07.00 |
| 6 | 25 | Tabitha GODDARD | 9 | Grantham | 1:06.57 |
| 7 | 26 | Maja BALL | 9 | Grantham | 1:06.00 |
| 8 | 27 | Yu Tsing (Trixie) CHEU | 12 | Grantham | 1:05.53 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 28 | Florence MCCANN | 9 | Lincoln Vulc | 1:05.07 |
| 2 | 29 | Lillian ROBSON | 11 | Lincoln Vulc | 1:04.56 |
| 3 | 30 | Mya LAMBERT | 10 | Co Lincoln P | 1:04.00 |
| 4 | 31 | Seren TWINLEY | 10 | Deepings | 1:03.33 |
| 5 | 32 | Gracie PAYNE | 12 | Grantham | 1:03.03 |
| 6 | 33 | A HATCHER BRENNAN | 11 | Deepings | 1:02.60 |
| 7 | 34 | Amy STEPHENSON | 11 | Co Lincoln P | 1:01.27 |
| 8 | 35 | Brooke LANSELL | 11 | Lincoln Vulc | 1:00.36 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 36 | Cecily THOMPSON | 9 | Lincoln Vulc | 1:00.00 |
| 2 | 37 | Emelia BARTON | 9 | Lincoln Vulc | 1:00.00 |
| 3 | 38 | Ada PAGE | 10 | Grantham | 57.99 |
| 4 | 39 | Lydia EVANS | 12 | Co Lincoln P | 57.60 |
| 5 | 40 | Jasmine CHEETHAM | 12 | Lincoln Vulc | 57.42 |
| 6 | 41 | Megan PERKIN | 11 | Lincoln Vulc | 57.39 |
| 7 | 42 | Matilda HARPER | 10 | Grantham | 57.38 |
| 8 | 43 | Matilda KOS | 11 | Co Lincoln P | 57.00 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 44 | Martha SMITH | 10 | Co Lincoln P | 56.66 |
| 2 | 45 | Tilly WASKETT-BOOTH | 10 | Grantham | 56.11 |
| 3 | 46 | Esme EVANS | 12 | Grantham | 55.35 |
| 4 | 47 | Amelie HUNT | 12 | Deepings | 55.30 |
| 5 | 48 | Jasmine HOLDER | 11 | Gainsborough | 55.00 |
| 6 | 49 | Martha WOOD | 9 | Grantham | 54.89 |
| 7 | 50 | Georgia BELLETT | 11 | Grantham | 54.62 |
| 8 | 51 | Rebecca BATISTA | 10 | Co Lincoln P | 54.57 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 52 | Isla GILLIATT | 11 | Co Lincoln P | 54.30 |
| 2 | 53 | Victoria MCKAY | 12 | Gainsborough | 54.29 |
| 3 | 54 | Seren EVANS | 11 | Co Lincoln P | 54.29 |
| 4 | 55 | Ginny PARNHAM | 12 | Lincoln Vulc | 54.16 |
| 5 | 56 | Hallie ELLIS-HYMAN | 10 | Lincoln Vulc | 54.11 |
| 6 | 57 | Niamh KERRIGAN | 12 | Co Lincoln P | 54.10 |
| 7 | 58 | Tilly ROTHWELL | 11 | Co Lincoln P | 53.78 |
| 8 | 59 | Evelyn LITTLE | 11 | Lincoln Vulc | 53.57 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 60 | Evangeline KINNEAR | 12 | Grantham | 53.23 |
| 2 | 61 | Jessica REEVES | 12 | Lincoln Vulc | 53.06 |
| 3 | 62 | Halla ALY | 12 | Lincoln Vulc | 53.05 |
| 4 | 63 | Hollie FORSYTH | 10 | Lincoln Vulc | 52.83 |
| 5 | 64 | C TOH-GRUDZINSKI | 10 | Lincoln Vulc | 52.76 |
| 6 | 65 | Francesca WESTON | 11 | Grantham | 52.64 |
| 7 | 66 | Abigail WORTHINGTON | 12 | Lincoln Vulc | 52.49 |
| 8 | 67 | Annabel HILLSON | 11 | Grantham | 52.37 |
| Heat Number - 10 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 69 | Mia WILLIAMS | 12 | Lincoln Vulc | 51.38 |
| 2 | 70 | Gabriella HAYES | 11 | NottmLeander | 51.37 |
| 3 | 71 | Ophelia GOODALE | 11 | Deepings | 51.36 |
| 4 | 73 | Poppy-Rose WILSON | 11 | Deepings | 51.17 |
| 5 | 74 | Eleanor DE ROSE | 12 | Deepings | 51.10 |
| 6 | 76 | Lucy MARTIN | 10 | Lincoln Vulc | 50.47 |
| 7 | 77 | Emily CLAYTON | 12 | Grantham | 50.38 |
| 8 | 78 | Chloe APPLEWHITE | 10 | Gainsborough | 49.99 |
| Heat Number - 11 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 79 | Evelyn NICHOLLS | 12 | Grantham | 49.98 |
| 2 | 80 | Amaya MONTEALEGRE | 12 | Lincoln Vulc | 49.94 |
| 3 | 81 | Emmeline GLEAVE | 10 | Grantham | 49.52 |
| 4 | 82 | Abigail TAYLOR | 12 | Grantham | 49.35 |
| 5 | 83 | Chloe GOACHER | 12 | Grantham | 49.24 |
| 6 | 84 | Ava MORGAN | 12 | Co Lincoln P | 49.06 |
| 7 | 85 | Caitlin BOWLES | 12 | Gainsborough | 47.80 |
| 8 | 86 | Isla ROBINSON | 12 | Co Lincoln P | 47.68 |
| Heat Number - 12 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 87 | Ruby TALKES | 10 | Lincoln Vulc | 47.57 |
| 2 | 88 | Eva MADDISON | 11 | Co Lincoln P | 47.29 |
| 3 | 89 | Honey FLOWER | 11 | Grantham | 47.20 |
| 4 | 90 | Aoife HICKEY | 12 | Deepings | 46.52 |
| 5 | 91 | Caitlynn EDMEADES | 12 | Deepings | 46.21 |
| 6 | 92 | Hollie-Ann CROOK | 11 | Grantham | 46.03 |
| 7 | 93 | Colette GRANTHAM | 12 | Lincoln Vulc | 45.30 |
| 8 | 94 | Esme APPLEWHITE | 12 | Gainsborough | 44.86 |
| Heat Number - 13 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 96 | Arin ELVIDGE | 12 | Lincoln Vulc | 44.10 |
| 2 | 98 | Alice SOWDEN | 11 | Gainsborough | 43.49 |
| 3 | 100 | Ella KHAMA | 12 | Grantham | 42.31 |
| 4 | 102 | Miley RICHARDSON | 12 | Co Lincoln P | 39.25 |
| 5 | 101 | Margot MARKS | 12 | Lincoln Vulc | 40.54 |
| 6 | 99 | Freya HUGHES | 12 | Co Lincoln P | 42.80 |
| 7 | 97 | Isobel DELDERFIELD | 12 | Co Lincoln P | 43.90 |
| 8 | 95 | Katie BEASTALL | 12 | Co Lincoln P | 44.24 |