EVENT 106 Female 09/Over 100m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Kara HARRITY | 9 | Melton M'bry | |
| 4 | 3 | Evangeline KINNEAR | 10 | Grantham | 2:20.63 |
| 5 | 2 | Suzuki CARTER | 9 | Skegness | 2:23.25 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 5 | Wendy VARCOE | 10 | Louth | 2:00.00 |
| 3 | 7 | Abigail TAYLOR | 10 | Grantham | 1:58.38 |
| 4 | 9 | Annabel HILLSON | 9 | Grantham | 1:57.00 |
| 5 | 8 | Emily CLAYTON | 10 | Grantham | 1:58.37 |
| 6 | 6 | Matilda MCDONNELL | 11 | Grantham | 1:59.69 |
| 7 | 4 | Alyssia DONNISON | 13 | Louth | 2:17.26 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Aoife DUNCAN | 11 | Louth | 1:50.00 |
| 2 | 13 | Madeline SURTEES | 11 | Grantham | 1:49.90 |
| 3 | 15 | Bella Rose ASKEW | 11 | Skegness | 1:44.51 |
| 4 | 17 | Ella KHAMA | 10 | Grantham | 1:42.64 |
| 5 | 16 | Lilly THROWER | 10 | Louth | 1:44.12 |
| 6 | 14 | Hollie-Anne CROOK | 10 | Grantham | 1:46.14 |
| 7 | 12 | Helena HAMILTON | 12 | Grantham | 1:50.00 |
| 8 | 10 | Olivia CHARITY | 12 | Grantham | 1:55.00 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 19 | Isabelle CLAYTON | 11 | Grantham | 1:41.40 |
| 2 | 21 | Amelie MORRIS | 12 | Boston | 1:38.94 |
| 3 | 23 | Florence SHEPHERD | 12 | Gainsborough | 1:37.28 |
| 4 | 25 | Octavia SHEARN | 11 | Grantham | 1:36.65 |
| 5 | 24 | Poppy CHAPMAN | 12 | Louth | 1:37.00 |
| 6 | 22 | Isla-Rose WILDISH | 10 | Retford | 1:37.62 |
| 7 | 20 | Eden DAVIES | 9 | March | 1:40.23 |
| 8 | 18 | Thea WHOTTON | 11 | Louth | 1:41.51 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 27 | Izabella ZANIEWSKA | 11 | Boston | 1:34.69 |
| 2 | 29 | Poppy HATHWAY | 12 | Grantham | 1:32.00 |
| 3 | 31 | Sienna MERCER | 12 | Melton M'bry | 1:29.30 |
| 4 | 33 | Mia PARAPIJONAVICIUTE | 15 | Grantham | 1:27.86 |
| 5 | 32 | Lucy BARRATT | 11 | Gainsborough | 1:29.18 |
| 6 | 30 | Elisabeth KINNEAR | 14 | Grantham | 1:30.50 |
| 7 | 28 | Abbie MACKIE | 14 | March | 1:33.53 |
| 8 | 26 | Paris CABORN | 11 | Louth | 1:34.88 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 35 | Ella HE | 11 | Gainsborough | 1:26.67 |
| 2 | 38 | Alicia-Rose OSWIN | 16 | Boston | 1:25.88 |
| 3 | 40 | Annie WEBSTER | 12 | Grantham | 1:24.27 |
| 4 | 42 | Vilte ROPEIKAITE | 15 | Boston | 1:23.54 |
| 5 | 41 | Amy TAYLOR | 13 | Grantham | 1:24.00 |
| 6 | 39 | Sophie SHARPE | 13 | Melton M'bry | 1:25.83 |
| 7 | 36 | Erin NORTON | 13 | Boston | 1:26.62 |
| 8 | 34 | Isla LORMOR | 11 | Gainsborough | 1:27.81 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 44 | Amelia HATHWAY | 15 | Grantham | 1:22.46 |
| 2 | 46 | Darcey WOOD | 12 | Grantham | 1:21.19 |
| 3 | 48 | Alexa WRIGHT | 16 | Grantham | 1:20.43 |
| 4 | 50 | Ellena HOWITT | 13 | Grantham | 1:19.28 |
| 5 | 49 | Milen MERRITT | 12 | Melton M'bry | 1:19.75 |
| 6 | 47 | Grace HOWITT | 15 | Grantham | 1:20.48 |
| 7 | 45 | Lexie SHEWAN | 13 | Grantham | 1:21.41 |
| 8 | 43 | Yasmine WAITE | 14 | March | 1:22.69 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 52 | Megan RUTT | 14 | Boston | 1:17.67 |
| 2 | 54 | Ivy BROWN | 12 | Melton M'bry | 1:15.43 |
| 3 | 56 | Isobel ALLSOP | 14 | Grantham | 1:13.94 |
| 4 | 58 | Isabelle MCCORKELL | 16 | Gainsborough | 1:10.38 |
| 5 | 57 | Jessica - Rose DAVISON | 14 | Grantham | 1:12.05 |
| 6 | 55 | Lucy WILLATTS | 12 | Grantham | 1:14.20 |
| 7 | 53 | Annabelle JAY | 12 | Grantham | 1:16.07 |
| 8 | 51 | Elena ALDENHOFF-KELLY | 15 | Grantham | 1:19.11 |