EVENT 405 Female 12 Yrs/Under 50m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Evelyn CHARITY | 9 | Grantham | 1:14.89 |
| 4 | 3 | Charlotte DAVIES | 10 | Deepings | 1:04.81 |
| 5 | 4 | F FRASER-CATTANACH | 12 | Lincoln Vulc | 1:03.14 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 5 | Tabitha GODDARD | 9 | Grantham | 1:02.26 |
| 3 | 6 | Ella CRADDOCK | 12 | Co Lincoln P | 1:02.00 |
| 4 | 7 | Maja BALL | 9 | Grantham | 1:01.71 |
| 5 | 8 | Polina KUDRIAVETS | 10 | Deepings | 1:01.47 |
| 6 | 9 | Beatrix SHEPPARD | 9 | Grantham | 1:00.88 |
| 7 | 10 | Ada HUGHES | 10 | Co Lincoln P | 1:00.21 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Georgia HUNT | 10 | Grantham | 59.02 |
| 2 | 12 | Imola HARRIS | 9 | Grantham | 58.46 |
| 3 | 13 | Elsie WENTWORTH | 11 | Lincoln Vulc | 58.31 |
| 4 | 14 | Tabitha LAMBERT | 10 | Lincoln Vulc | 58.03 |
| 5 | 15 | Harriet HOLLOWAY | 11 | Deepings | 57.49 |
| 6 | 16 | Sienna GREEN | 11 | Co Lincoln P | 55.70 |
| 7 | 17 | Norah GIBSON | 11 | Grantham | 55.65 |
| 8 | 18 | Seren TWINLEY | 10 | Deepings | 55.26 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 20 | Ada PAGE | 10 | Grantham | 54.00 |
| 2 | 21 | Sophia WRIGHT | 10 | Grantham | 53.75 |
| 3 | 24 | Halla ALY | 12 | Lincoln Vulc | 53.12 |
| 4 | 26 | Charlotte BERRY | 11 | Co Lincoln P | 52.45 |
| 5 | 27 | Mya LAMBERT | 10 | Co Lincoln P | 52.37 |
| 6 | 28 | Matilda HARPER | 10 | Grantham | 52.06 |
| 7 | 29 | Felicity MARSHALL | 12 | Deepings | 51.33 |
| 8 | 30 | Chloe BERNERS | 12 | Deepings | 51.04 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 31 | Lillian ROBSON | 11 | Lincoln Vulc | 51.00 |
| 2 | 32 | Martha SMITH | 10 | Co Lincoln P | 50.83 |
| 3 | 33 | Martha WILLIAMS | 9 | Lincoln Vulc | 50.67 |
| 4 | 34 | Florence MCCANN | 9 | Lincoln Vulc | 50.49 |
| 5 | 36 | Jessica REEVES | 12 | Lincoln Vulc | 50.00 |
| 6 | 37 | Ginny PARNHAM | 12 | Lincoln Vulc | 49.99 |
| 7 | 38 | Megan PERKIN | 11 | Lincoln Vulc | 49.55 |
| 8 | 39 | Emily CLAYTON | 12 | Grantham | 48.65 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 40 | Martha WOOD | 9 | Grantham | 48.64 |
| 2 | 42 | Matilda KOS | 11 | Co Lincoln P | 48.23 |
| 3 | 43 | Bethany MEAKIN | 11 | Grantham | 48.21 |
| 4 | 44 | Amy STEPHENSON | 11 | Co Lincoln P | 47.99 |
| 5 | 45 | Georgia BELLETT | 11 | Grantham | 47.60 |
| 6 | 46 | Emilia BENNETT | 11 | Co Lincoln P | 47.57 |
| 7 | 47 | Rebecca BATISTA | 10 | Co Lincoln P | 47.43 |
| 8 | 49 | Erin SMITH | 10 | Deepings | 47.11 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 50 | Hallie ELLIS-HYMAN | 10 | Lincoln Vulc | 47.00 |
| 2 | 51 | Annabel HILLSON | 11 | Grantham | 46.69 |
| 3 | 52 | Ava MORGAN | 12 | Co Lincoln P | 46.66 |
| 4 | 53 | Tilly WASKETT-BOOTH | 10 | Grantham | 46.41 |
| 5 | 54 | Amelie HUNT | 12 | Deepings | 46.04 |
| 6 | 55 | Evangeline KINNEAR | 12 | Grantham | 45.70 |
| 7 | 56 | Emmeline GLEAVE | 10 | Grantham | 45.33 |
| 8 | 57 | Yu Tsing (Trixie) CHEU | 12 | Grantham | 45.26 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 58 | A HATCHER BRENNAN | 11 | Deepings | 45.12 |
| 2 | 59 | Evelyn NICHOLLS | 12 | Grantham | 44.91 |
| 3 | 60 | Chloe GOACHER | 12 | Grantham | 44.65 |
| 4 | 61 | Poppy-Rose WILSON | 11 | Deepings | 44.35 |
| 5 | 62 | Abigail TAYLOR | 12 | Grantham | 44.00 |
| 6 | 63 | Hollie FORSYTH | 10 | Lincoln Vulc | 43.96 |
| 7 | 64 | Brooke LANSELL | 11 | Lincoln Vulc | 43.93 |
| 8 | 65 | Seren EVANS | 11 | Co Lincoln P | 43.83 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 66 | Eleanor DE ROSE | 12 | Deepings | 43.80 |
| 2 | 67 | Esme EVANS | 12 | Grantham | 43.63 |
| 3 | 69 | Evelyn LITTLE | 11 | Lincoln Vulc | 43.35 |
| 4 | 70 | Lydia EVANS | 12 | Co Lincoln P | 42.95 |
| 5 | 71 | Jasmine CHEETHAM | 12 | Lincoln Vulc | 42.76 |
| 6 | 73 | Ophelia GOODALE | 11 | Deepings | 42.36 |
| 7 | 74 | C TOH-GRUDZINSKI | 10 | Lincoln Vulc | 42.28 |
| 8 | 75 | Isla GILLIATT | 11 | Co Lincoln P | 42.17 |
| Heat Number - 10 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 76 | Lucy MARTIN | 10 | Lincoln Vulc | 41.95 |
| 2 | 77 | Jasmine HOLDER | 11 | Gainsborough | 41.58 |
| 3 | 78 | Mia WILLIAMS | 12 | Lincoln Vulc | 41.16 |
| 4 | 80 | Florence HIPPISLEY | 12 | Co Lincoln P | 40.88 |
| 5 | 81 | Niamh KERRIGAN | 12 | Co Lincoln P | 40.64 |
| 6 | 82 | Caitlynn EDMEADES | 12 | Deepings | 40.55 |
| 7 | 83 | Abigail WORTHINGTON | 12 | Lincoln Vulc | 40.41 |
| 8 | 85 | Victoria MCKAY | 12 | Gainsborough | 40.05 |
| Heat Number - 11 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 86 | Arin ELVIDGE | 12 | Lincoln Vulc | 40.00 |
| 2 | 87 | Freya HUGHES | 12 | Co Lincoln P | 39.81 |
| 3 | 88 | Francesca WESTON | 11 | Grantham | 39.38 |
| 4 | 89 | Isla ROBINSON | 12 | Co Lincoln P | 39.30 |
| 5 | 90 | Honey FLOWER | 11 | Grantham | 39.25 |
| 6 | 91 | Hollie-Ann CROOK | 11 | Grantham | 39.20 |
| 7 | 92 | Chloe APPLEWHITE | 10 | Gainsborough | 39.05 |
| 8 | 94 | Alice SOWDEN | 11 | Gainsborough | 38.61 |
| Heat Number - 12 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 97 | Eva MADDISON | 11 | Co Lincoln P | 38.18 |
| 2 | 99 | Aoife HICKEY | 12 | Deepings | 37.05 |
| 3 | 102 | Ruby TALKES | 10 | Lincoln Vulc | 35.77 |
| 4 | 104 | Miley RICHARDSON | 12 | Co Lincoln P | 34.15 |
| 5 | 103 | Isobel DELDERFIELD | 12 | Co Lincoln P | 34.46 |
| 6 | 100 | Margot MARKS | 12 | Lincoln Vulc | 36.70 |
| 7 | 98 | Esme APPLEWHITE | 12 | Gainsborough | 37.54 |
| 8 | 95 | Caitlin BOWLES | 12 | Gainsborough | 38.38 |