EVENT 401 Mixed 200m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Francesca WESTON | 9 | Grantham | 4:20.00 |
| 2 | 2 | Evangeline KINNEAR | 11 | Grantham | 4:09.03 |
| 3 | 3 | Emmeline GLEAVE | 9 | Grantham | 4:08.29 |
| 4 | 4 | Abigail TAYLOR | 10 | Grantham | 4:04.23 |
| 5 | 5 | Francesca MORGAN | 11 | Grantham | 4:03.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | Daniel GODDARD | 9 | Grantham | 3:53.23 |
| 2 | 7 | Benjamin SHEARN | 10 | Grantham | 3:46.99 |
| 3 | 8 | Annabel HILLSON | 9 | Grantham | 3:39.94 |
| 4 | 9 | Louis WRIGHT | 11 | Grantham | 3:32.60 |
| 5 | 10 | Madeline SURTEES | 12 | Grantham | 3:22.94 |
| 6 | 11 | Juliette KIM | 9 | Grantham | 3:13.37 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 12 | Octavia SHEARN | 12 | Grantham | 3:12.68 |
| 2 | 13 | Ava-Grace GREGORY | 12 | Grantham | 3:09.32 |
| 3 | 14 | Benjamin GODDARD | 11 | Grantham | 3:08.33 |
| 4 | 15 | Hollie-Anne CROOK | 10 | Grantham | 3:06.69 |
| 5 | 16 | Markas PARAPIJONAVICIU | 11 | Grantham | 3:02.59 |
| 6 | 17 | Ella KHAMA | 10 | Grantham | 3:01.78 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Jimmin BAO | 11 | Grantham | 3:01.00 |
| 2 | 19 | Freddie HIRST | 10 | Grantham | 3:00.16 |
| 3 | 20 | Juliette KING | 12 | Grantham | 2:58.16 |
| 4 | 21 | Derrin BROCKLEBANK | 10 | Grantham | 2:57.94 |
| 5 | 22 | Henry DOLAN | 11 | Grantham | 2:57.12 |
| 6 | 23 | Elliot GLEAVE | 11 | Grantham | 2:56.18 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 24 | Charlotte GILL | 16 | Grantham | 2:50.94 |
| 2 | 25 | Toby EDMONDSON | 10 | Grantham | 2:50.64 |
| 3 | 26 | Lucy ABBOTT | 12 | Grantham | 2:50.21 |
| 4 | 27 | Jake MCGHEE | 14 | Grantham | 2:50.00 |
| 5 | 28 | Yu Ching (Eugene) CHEU | 13 | Grantham | 2:49.53 |
| 6 | 29 | Isabelle CLAYTON | 12 | Grantham | 2:49.51 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 30 | George LEONARD | 12 | Grantham | 2:49.01 |
| 2 | 31 | Thomas HILLSON | 11 | Grantham | 2:48.40 |
| 3 | 32 | Arthur BREARLEY-NEWSOM | 13 | Grantham | 2:48.36 |
| 4 | 33 | Fabian KOLASA | 13 | Grantham | 2:48.07 |
| 5 | 34 | Poppy HATHWAY | 13 | Grantham | 2:47.87 |
| 6 | 35 | Leo BARNETT | 12 | Grantham | 2:46.74 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 36 | Elisabeth KINNEAR | 14 | Grantham | 2:45.70 |
| 2 | 37 | Mia PARAPIJONAVICIUTE | 15 | Grantham | 2:45.49 |
| 3 | 38 | Violet NISBET | 13 | Grantham | 2:45.00 |
| 4 | 39 | Annie WEBSTER | 12 | Grantham | 2:43.90 |
| 5 | 40 | Alfie HAIGH | 15 | Grantham | 2:42.80 |
| 6 | 41 | Joshua KIM | 12 | Grantham | 2:42.47 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 42 | Eden DYSON | 13 | Grantham | 2:40.32 |
| 2 | 43 | Grace HOWITT | 15 | Grantham | 2:39.86 |
| 3 | 44 | Amelia HATHWAY | 15 | Grantham | 2:36.06 |
| 4 | 45 | Lexie SHEWAN | 14 | Grantham | 2:34.06 |
| 5 | 46 | Amy TAYLOR | 13 | Grantham | 2:33.73 |
| 6 | 47 | Ben CARLYLE | 14 | Grantham | 2:32.74 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 48 | Isobel ALLSOP | 14 | Grantham | 2:32.21 |
| 2 | 49 | Sophie WARD | 15 | Grantham | 2:30.70 |
| 3 | 50 | Annabelle JAY | 13 | Grantham | 2:30.35 |
| 4 | 51 | Emilie WEBB | 14 | Grantham | 2:27.76 |
| 5 | 52 | Harriet MCCORMACK | 15 | Grantham | 2:27.32 |
| 6 | 53 | Ellena HOWITT | 13 | Grantham | 2:23.29 |
| Heat Number - 10 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 54 | Jessica - Rose DAVISON | 15 | Grantham | 2:22.45 |
| 2 | 55 | Lucy WILLATTS | 13 | Grantham | 2:21.28 |
| 3 | 56 | Isla GRAY | 14 | Grantham | 2:20.50 |
| 4 | 57 | Megan BROWN | 15 | Grantham | 2:19.47 |
| 5 | 58 | Elena ALDENHOFF-KELLY | 16 | Grantham | 2:16.50 |
| 6 | 59 | Daniel DEGNAN | 16 | Grantham | 2:11.72 |
| Heat Number - 11 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 61 | Zach HOPKINSON | 15 | Grantham | 2:08.06 |
| 2 | 63 | Benjamin ROBERTS | 15 | Grantham | 2:04.92 |
| 3 | 65 | Joshua CLARKE | 16 | Grantham | 2:00.02 |
| 4 | 64 | Owen HATHWAY | 18 | Grantham | 2:02.08 |
| 5 | 62 | Jacob FISH | 15 | Grantham | 2:06.09 |
| 6 | 60 | Grace TURNER | 17 | Grantham | 2:10.87 |