EVENT 204 Mixed 100m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Louis THOMPSON | 9 | Grantham | 3:15.00 |
| 3 | 2 | Emmeline GLEAVE | 9 | Grantham | 2:01.86 |
| 4 | 3 | Evangeline KINNEAR | 11 | Grantham | 2:01.33 |
| 5 | 4 | Annabel HILLSON | 9 | Grantham | 2:00.45 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Chloe GOACHER | 11 | Grantham | 2:00.00 |
| 2 | 6 | Abigail TAYLOR | 10 | Grantham | 1:59.30 |
| 3 | 7 | Poppy BRODIE | 12 | Grantham | 1:56.55 |
| 4 | 8 | Honey FLOWER | 10 | Grantham | 1:55.10 |
| 5 | 9 | Lizzy LERESCHE HANDS | 13 | Grantham | 1:51.75 |
| 6 | 10 | Emily CLAYTON | 10 | Grantham | 1:51.64 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Matilda MCDONNELL | 11 | Grantham | 1:50.71 |
| 2 | 12 | Elizabeth JONES | 14 | Grantham | 1:50.00 |
| 3 | 13 | Madeline SURTEES | 12 | Grantham | 1:45.55 |
| 4 | 14 | Ruby NISBET | 10 | Grantham | 1:44.81 |
| 5 | 15 | Benjamin SHEARN | 10 | Grantham | 1:42.24 |
| 6 | 16 | Juliette KIM | 9 | Grantham | 1:37.75 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 17 | Thomas KINNEAR | 13 | Grantham | 1:37.45 |
| 2 | 18 | Hollie-Anne CROOK | 10 | Grantham | 1:36.06 |
| 3 | 19 | Octavia SHEARN | 12 | Grantham | 1:35.37 |
| 4 | 20 | Freddie HIRST | 10 | Grantham | 1:34.88 |
| 5 | 21 | Ella KHAMA | 10 | Grantham | 1:33.40 |
| 6 | 22 | Derrin BROCKLEBANK | 10 | Grantham | 1:33.03 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 23 | Elisabeth KINNEAR | 14 | Grantham | 1:32.95 |
| 2 | 24 | Charlotte GILL | 16 | Grantham | 1:32.88 |
| 3 | 25 | Isabelle CLAYTON | 12 | Grantham | 1:31.35 |
| 4 | 26 | Elliot GLEAVE | 11 | Grantham | 1:31.25 |
| 5 | 27 | Henry DOLAN | 11 | Grantham | 1:29.96 |
| 6 | 28 | Markas PARAPIJONAVICIU | 11 | Grantham | 1:29.64 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 29 | Eden DYSON | 13 | Grantham | 1:29.47 |
| 2 | 30 | Yu Ching (Eugene) CHEU | 13 | Grantham | 1:29.13 |
| 3 | 31 | Hannah DOBNEY | 15 | Grantham | 1:29.04 |
| 4 | 32 | Toby EDMONDSON | 10 | Grantham | 1:28.24 |
| 5 | 33 | Juliette KING | 12 | Grantham | 1:27.77 |
| 6 | 34 | George LEONARD | 12 | Grantham | 1:26.87 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 35 | Thomas HILLSON | 11 | Grantham | 1:26.68 |
| 2 | 36 | Fabian KOLASA | 13 | Grantham | 1:26.15 |
| 3 | 37 | Lexie SHEWAN | 14 | Grantham | 1:23.55 |
| 4 | 38 | Mia PARAPIJONAVICIUTE | 15 | Grantham | 1:23.40 |
| 5 | 39 | Lucy ABBOTT | 12 | Grantham | 1:22.91 |
| 6 | 40 | Annie WEBSTER | 12 | Grantham | 1:22.16 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 41 | Grace HOWITT | 15 | Grantham | 1:21.77 |
| 2 | 42 | Alexa WRIGHT | 16 | Grantham | 1:21.23 |
| 3 | 43 | Elena ALDENHOFF-KELLY | 16 | Grantham | 1:21.19 |
| 4 | 44 | Annabelle JAY | 13 | Grantham | 1:19.83 |
| 5 | 45 | Darcey WOOD | 13 | Grantham | 1:19.65 |
| 6 | 46 | Amy TAYLOR | 13 | Grantham | 1:19.52 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 47 | Lucy WILLATTS | 13 | Grantham | 1:17.84 |
| 2 | 48 | Jessica - Rose DAVISON | 15 | Grantham | 1:17.52 |
| 3 | 49 | Ellena HOWITT | 13 | Grantham | 1:16.53 |
| 4 | 50 | Sophie WARD | 15 | Grantham | 1:16.22 |
| 5 | 51 | Emilie WEBB | 14 | Grantham | 1:14.94 |
| 6 | 52 | Ben CARLYLE | 14 | Grantham | 1:11.99 |
| Heat Number - 10 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 53 | Megan BROWN | 15 | Grantham | 1:10.96 |
| 2 | 54 | James NICHOLS | 15 | Grantham | 1:10.94 |
| 3 | 55 | Evie TURNER | 18 | Grantham | 1:10.38 |
| 4 | 56 | Grace TURNER | 17 | Grantham | 1:09.46 |
| 5 | 57 | Daniel DEGNAN | 16 | Grantham | 1:07.46 |
| 6 | 58 | Grace MACDONALD | 15 | Grantham | 1:06.39 |
| Heat Number - 11 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 60 | Jack ZERAVICA | 16 | Grantham | 1:04.69 |
| 2 | 62 | George BERWICK | 21 | Grantham | 1:03.02 |
| 3 | 64 | Joshua CLARKE | 16 | Grantham | 1:02.37 |
| 4 | 63 | Benjamin ROBERTS | 15 | Grantham | 1:02.62 |
| 5 | 61 | Jacob FISH | 15 | Grantham | 1:04.31 |
| 6 | 59 | Zach HOPKINSON | 15 | Grantham | 1:05.70 |