EVENT 402 Mixed 50m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | George DOLAN | 8 | Grantham | 1:15.00 |
| 3 | 2 | Evie FELTON | 9 | Grantham | 1:10.00 |
| 4 | 3 | Niha YEWLETT | 10 | Grantham | 1:02.56 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Sophia WRIGHT | 8 | Grantham | 1:02.00 |
| 2 | 5 | Louis THOMPSON | 9 | Grantham | 1:02.00 |
| 3 | 6 | Francesca MORGAN | 11 | Grantham | 1:02.00 |
| 4 | 7 | Hannah EXLEY | 10 | Grantham | 1:02.00 |
| 5 | 8 | Olivia TURNER | 11 | Grantham | 1:02.00 |
| 6 | 9 | Emmeline GLEAVE | 9 | Grantham | 1:00.93 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Evangeline KINNEAR | 11 | Grantham | 59.51 |
| 2 | 12 | Yu Tsing (Trixie) CHEU | 11 | Grantham | 58.62 |
| 3 | 13 | Daniel GODDARD | 9 | Grantham | 55.38 |
| 4 | 14 | Honey FLOWER | 10 | Grantham | 54.61 |
| 5 | 15 | Abigail TAYLOR | 10 | Grantham | 54.18 |
| 6 | 16 | Annabel HILLSON | 9 | Grantham | 53.44 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Cyril BAO | 8 | Grantham | 51.50 |
| 2 | 18 | Poppy BRODIE | 12 | Grantham | 50.55 |
| 3 | 19 | Louis WRIGHT | 11 | Grantham | 50.11 |
| 4 | 20 | Thomas KINNEAR | 13 | Grantham | 49.09 |
| 5 | 21 | Ava-Grace GREGORY | 12 | Grantham | 47.94 |
| 6 | 22 | Ruby NISBET | 10 | Grantham | 47.54 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 23 | Madeline SURTEES | 12 | Grantham | 47.34 |
| 2 | 24 | Benjamin SHEARN | 10 | Grantham | 46.98 |
| 3 | 25 | Benjamin GODDARD | 11 | Grantham | 46.94 |
| 4 | 26 | Helena HAMILTON | 13 | Grantham | 46.26 |
| 5 | 27 | Henry DOLAN | 11 | Grantham | 46.00 |
| 6 | 28 | Freddie HIRST | 10 | Grantham | 45.75 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 29 | Juliette KIM | 9 | Grantham | 45.48 |
| 2 | 30 | Arthur BREARLEY-NEWSOM | 13 | Grantham | 44.65 |
| 3 | 31 | Elizabeth JONES | 14 | Grantham | 44.27 |
| 4 | 32 | Hollie-Anne CROOK | 10 | Grantham | 44.07 |
| 5 | 33 | Violet NISBET | 13 | Grantham | 43.81 |
| 6 | 34 | Isabelle CLAYTON | 12 | Grantham | 43.69 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 35 | Ella KHAMA | 10 | Grantham | 43.44 |
| 2 | 36 | Leo BARNETT | 12 | Grantham | 43.39 |
| 3 | 37 | Toby EDMONDSON | 10 | Grantham | 43.11 |
| 4 | 38 | Derrin BROCKLEBANK | 10 | Grantham | 42.80 |
| 5 | 39 | Yu Ching (Eugene) CHEU | 13 | Grantham | 42.57 |
| 6 | 40 | Octavia SHEARN | 12 | Grantham | 42.51 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 41 | George LEONARD | 12 | Grantham | 42.47 |
| 2 | 42 | Charlotte GILL | 16 | Grantham | 42.19 |
| 3 | 43 | Elisabeth KINNEAR | 14 | Grantham | 41.86 |
| 4 | 44 | Markas PARAPIJONAVICIU | 11 | Grantham | 41.24 |
| 5 | 45 | Poppy HATHWAY | 13 | Grantham | 40.37 |
| 6 | 46 | Elliot GLEAVE | 11 | Grantham | 40.17 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 47 | Mia PARAPIJONAVICIUTE | 15 | Grantham | 40.07 |
| 2 | 48 | Thomas HILLSON | 11 | Grantham | 39.38 |
| 3 | 49 | Annie WEBSTER | 12 | Grantham | 38.74 |
| 4 | 50 | Amelia HATHWAY | 15 | Grantham | 38.53 |
| 5 | 51 | Grace HOWITT | 15 | Grantham | 38.14 |
| 6 | 52 | Lexie SHEWAN | 14 | Grantham | 38.04 |
| Heat Number - 10 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 54 | Lucy ABBOTT | 12 | Grantham | 37.21 |
| 2 | 55 | Isla GRAY | 14 | Grantham | 37.08 |
| 3 | 56 | Elena ALDENHOFF-KELLY | 16 | Grantham | 36.96 |
| 4 | 57 | Sophie WARD | 15 | Grantham | 36.00 |
| 5 | 58 | Alfie HAIGH | 15 | Grantham | 36.00 |
| 6 | 59 | Amy TAYLOR | 13 | Grantham | 35.62 |
| Heat Number - 11 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 60 | Ellena HOWITT | 13 | Grantham | 35.56 |
| 2 | 61 | Annabelle JAY | 13 | Grantham | 34.62 |
| 3 | 62 | Jessica - Rose DAVISON | 15 | Grantham | 34.36 |
| 4 | 63 | Megan BROWN | 15 | Grantham | 34.22 |
| 5 | 64 | Lucy WILLATTS | 13 | Grantham | 34.14 |
| 6 | 65 | Isobel ALLSOP | 14 | Grantham | 33.67 |
| Heat Number - 12 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 66 | Emilie WEBB | 14 | Grantham | 32.78 |
| 2 | 67 | Zach HOPKINSON | 15 | Grantham | 32.65 |
| 3 | 68 | Luke DAYBELL | 15 | Grantham | 32.45 |
| 4 | 69 | Ben CARLYLE | 14 | Grantham | 32.11 |
| 5 | 70 | Evie TURNER | 18 | Grantham | 32.00 |
| 6 | 71 | Grace TURNER | 17 | Grantham | 31.50 |
| Heat Number - 13 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 73 | Jacob FISH | 15 | Grantham | 30.06 |
| 2 | 75 | Jack ZERAVICA | 16 | Grantham | 29.30 |
| 3 | 77 | Joshua CLARKE | 16 | Grantham | 27.56 |
| 4 | 76 | Owen HATHWAY | 18 | Grantham | 28.96 |
| 5 | 74 | Benjamin ROBERTS | 15 | Grantham | 29.82 |
| 6 | 72 | Daniel DEGNAN | 16 | Grantham | 31.30 |