EVENT 203 Mixed 100m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Dixie DITCHBURN | 10 | Grantham | 2:12.00 |
| 3 | 2 | Hana YEWLETT | 10 | Grantham | 2:04.00 |
| 4 | 3 | Ellie ROSE | 14 | Grantham | 2:03.00 |
| 5 | 4 | Sophia WRIGHT | 8 | Grantham | 2:02.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Niha YEWLETT | 10 | Grantham | 2:02.00 |
| 2 | 6 | Louis THOMPSON | 9 | Grantham | 2:02.00 |
| 3 | 7 | Francesca MORGAN | 11 | Grantham | 2:01.00 |
| 4 | 8 | Tilly WASKETT-BOOTH | 8 | Grantham | 2:00.00 |
| 5 | 9 | Emmeline GLEAVE | 9 | Grantham | 1:58.47 |
| 6 | 10 | Poppy BRODIE | 12 | Grantham | 1:54.62 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Evangeline KINNEAR | 11 | Grantham | 1:53.62 |
| 2 | 12 | Abigail TAYLOR | 10 | Grantham | 1:52.27 |
| 3 | 13 | Emily CLAYTON | 10 | Grantham | 1:48.87 |
| 4 | 14 | Annabel HILLSON | 9 | Grantham | 1:47.45 |
| 5 | 16 | Louis WRIGHT | 11 | Grantham | 1:42.61 |
| 6 | 17 | Juliette KIM | 9 | Grantham | 1:42.22 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Matilda MCDONNELL | 11 | Grantham | 1:39.77 |
| 2 | 19 | Benjamin SHEARN | 10 | Grantham | 1:39.33 |
| 3 | 20 | Madeline SURTEES | 12 | Grantham | 1:33.16 |
| 4 | 21 | Thomas KINNEAR | 13 | Grantham | 1:31.62 |
| 5 | 22 | Ruby NISBET | 10 | Grantham | 1:31.37 |
| 6 | 23 | Hollie-Anne CROOK | 10 | Grantham | 1:28.95 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 24 | Octavia SHEARN | 12 | Grantham | 1:28.48 |
| 2 | 25 | Elizabeth JONES | 14 | Grantham | 1:25.71 |
| 3 | 26 | Freddie HIRST | 10 | Grantham | 1:25.29 |
| 4 | 27 | Ava-Grace GREGORY | 12 | Grantham | 1:25.08 |
| 5 | 28 | Honey FLOWER | 10 | Grantham | 1:25.00 |
| 6 | 29 | Jake MCGHEE | 14 | Grantham | 1:23.83 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 30 | Henry DOLAN | 11 | Grantham | 1:22.94 |
| 2 | 31 | Ella KHAMA | 10 | Grantham | 1:22.78 |
| 3 | 32 | Derrin BROCKLEBANK | 10 | Grantham | 1:22.48 |
| 4 | 33 | Markas PARAPIJONAVICIU | 11 | Grantham | 1:21.87 |
| 5 | 34 | Elliot GLEAVE | 11 | Grantham | 1:20.80 |
| 6 | 35 | Yu Ching (Eugene) CHEU | 13 | Grantham | 1:20.53 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 36 | George LEONARD | 12 | Grantham | 1:20.31 |
| 2 | 37 | Charlotte GILL | 16 | Grantham | 1:19.81 |
| 3 | 38 | Elisabeth KINNEAR | 14 | Grantham | 1:18.90 |
| 4 | 39 | Isabelle CLAYTON | 12 | Grantham | 1:18.57 |
| 5 | 40 | Daisy CANTILLON | 12 | Grantham | 1:18.00 |
| 6 | 41 | Toby EDMONDSON | 10 | Grantham | 1:17.85 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 42 | Leo BARNETT | 12 | Grantham | 1:17.66 |
| 2 | 43 | Thomas HILLSON | 11 | Grantham | 1:17.50 |
| 3 | 44 | Juliette KING | 12 | Grantham | 1:16.65 |
| 4 | 45 | Joshua KIM | 12 | Grantham | 1:15.68 |
| 5 | 46 | Mia PARAPIJONAVICIUTE | 15 | Grantham | 1:15.11 |
| 6 | 47 | Lucy ABBOTT | 12 | Grantham | 1:14.61 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 48 | Annie WEBSTER | 12 | Grantham | 1:14.38 |
| 2 | 49 | Fabian KOLASA | 13 | Grantham | 1:14.11 |
| 3 | 50 | Grace HOWITT | 15 | Grantham | 1:12.95 |
| 4 | 51 | Eden DYSON | 13 | Grantham | 1:12.35 |
| 5 | 52 | Alexa WRIGHT | 16 | Grantham | 1:12.13 |
| 6 | 53 | Lexie SHEWAN | 14 | Grantham | 1:11.80 |
| Heat Number - 10 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 54 | Lizzy LERESCHE HANDS | 13 | Grantham | 1:11.40 |
| 2 | 55 | Amy TAYLOR | 13 | Grantham | 1:10.64 |
| 3 | 56 | Emilie WEBB | 14 | Grantham | 1:10.04 |
| 4 | 57 | Annabelle JAY | 13 | Grantham | 1:09.32 |
| 5 | 58 | Sophie WARD | 15 | Grantham | 1:08.26 |
| 6 | 59 | Lucy WILLATTS | 13 | Grantham | 1:07.90 |
| Heat Number - 11 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 60 | Darcey WOOD | 13 | Grantham | 1:07.83 |
| 2 | 61 | Ellena HOWITT | 13 | Grantham | 1:07.80 |
| 3 | 62 | Jessica - Rose DAVISON | 15 | Grantham | 1:05.27 |
| 4 | 63 | Elena ALDENHOFF-KELLY | 16 | Grantham | 1:03.70 |
| 5 | 64 | Ben CARLYLE | 14 | Grantham | 1:03.57 |
| 6 | 65 | Megan BROWN | 15 | Grantham | 1:02.60 |
| Heat Number - 12 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 66 | Luke DAYBELL | 15 | Grantham | 1:01.19 |
| 2 | 67 | Daniel DEGNAN | 16 | Grantham | 1:00.92 |
| 3 | 68 | Grace TURNER | 17 | Grantham | 1:00.90 |
| 4 | 69 | James NICHOLS | 15 | Grantham | 1:00.89 |
| 5 | 70 | Alisha TYERS | 24 | Grantham | 1:00.57 |
| 6 | 71 | Grace MACDONALD | 15 | Grantham | 1:00.40 |
| Heat Number - 13 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 73 | Adam FOUND | 27 | Grantham | 58.00 |
| 2 | 75 | George BERWICK | 21 | Grantham | 56.50 |
| 3 | 77 | Benjamin ROBERTS | 15 | Grantham | 53.80 |
| 4 | 76 | Joshua CLARKE | 16 | Grantham | 55.85 |
| 5 | 74 | Jacob FISH | 15 | Grantham | 57.61 |
| 6 | 72 | Zach HOPKINSON | 15 | Grantham | 59.43 |