EVENT 405 Mixed 200m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | George DOLAN | 9 | Grantham | |
| 2 | 2 | Henry LEONARD | 9 | Grantham | |
| 3 | 3 | Matilda HARPER | 9 | Grantham | 4:20.06 |
| 4 | 4 | Sophia WRIGHT | 9 | Grantham | 4:08.96 |
| 5 | 5 | Norahh MOE-AUNG | 11 | Grantham | 4:00.00 |
| 6 | 6 | Hannah EXLEY | 11 | Grantham | 3:50.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 7 | Yu Tsing (Trixie) CHEU | 12 | Grantham | 3:46.00 |
| 2 | 8 | Gracie PAYNE | 12 | Grantham | 3:46.00 |
| 3 | 9 | Evelyn NICHOLLS | 12 | Grantham | 3:40.37 |
| 4 | 10 | Esmé EVANS | 11 | Grantham | 3:40.00 |
| 5 | 11 | Evangeline KINNEAR | 12 | Grantham | 3:36.98 |
| 6 | 12 | Tilly WASKETT-BOOTH | 9 | Grantham | 3:36.49 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 13 | Emily CLAYTON | 11 | Grantham | 3:36.22 |
| 2 | 14 | Ralph MILNE | 10 | Grantham | 3:30.00 |
| 3 | 15 | Annabel HILLSON | 10 | Grantham | 3:27.88 |
| 4 | 16 | Abigail TAYLOR | 11 | Grantham | 3:25.00 |
| 5 | 17 | Thomas WHITTLE | 13 | Grantham | 3:21.47 |
| 6 | 18 | Francesca WESTON | 10 | Grantham | 3:17.19 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 19 | Daniel GODDARD | 10 | Grantham | 3:11.41 |
| 2 | 20 | Emmeline GLEAVE | 10 | Grantham | 3:11.02 |
| 3 | 21 | William PENNOCK | 11 | Grantham | 3:09.38 |
| 4 | 22 | Benjamin SHEARN | 11 | Grantham | 3:08.83 |
| 5 | 23 | Cyril BAO | 9 | Grantham | 3:08.55 |
| 6 | 24 | Olivia CHARITY | 13 | Grantham | 3:06.33 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 25 | Matilda MCDONNELL | 12 | Grantham | 3:03.22 |
| 2 | 26 | Florence HARPER | 12 | Grantham | 3:01.50 |
| 3 | 27 | Madeline SURTEES | 13 | Grantham | 2:59.52 |
| 4 | 28 | Benjamin GODDARD | 12 | Grantham | 2:57.95 |
| 5 | 29 | Juliette KIM | 10 | Grantham | 2:57.57 |
| 6 | 30 | Louis WRIGHT | 12 | Grantham | 2:57.30 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 31 | Octavia SHEARN | 13 | Grantham | 2:56.14 |
| 2 | 32 | Ava-Grace GREGORY | 13 | Grantham | 2:54.96 |
| 3 | 33 | Yu Ching (Eugene) CHEU | 14 | Grantham | 2:48.40 |
| 4 | 34 | Ella KHAMA | 11 | Grantham | 2:48.22 |
| 5 | 35 | Henry DOLAN | 12 | Grantham | 2:47.97 |
| 6 | 36 | Freddie HIRST | 11 | Grantham | 2:45.17 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 37 | Lucy ABBOTT | 13 | Grantham | 2:44.13 |
| 2 | 38 | Hollie-Ann CROOK | 11 | Grantham | 2:42.94 |
| 3 | 39 | Isabelle CLAYTON | 13 | Grantham | 2:42.64 |
| 4 | 40 | Arthur BREARLEY-NEWSOM | 14 | Grantham | 2:42.39 |
| 5 | 41 | Elisabeth KINNEAR | 15 | Grantham | 2:41.75 |
| 6 | 42 | Derrin BROCKLEBANK | 11 | Grantham | 2:41.37 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 43 | Elliot GLEAVE | 12 | Grantham | 2:41.01 |
| 2 | 44 | Mia PARAPIJONAVICIUTE | 16 | Grantham | 2:40.75 |
| 3 | 45 | Grace HOWITT | 16 | Grantham | 2:37.52 |
| 4 | 46 | Thomas HILLSON | 12 | Grantham | 2:36.68 |
| 5 | 47 | George LEONARD | 13 | Grantham | 2:36.49 |
| 6 | 48 | Toby EDMONDSON | 11 | Grantham | 2:35.44 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 49 | Joshua KIM | 13 | Grantham | 2:34.16 |
| 2 | 50 | Leo BARNETT | 13 | Grantham | 2:33.35 |
| 3 | 51 | Lexie SHEWAN | 15 | Grantham | 2:31.56 |
| 4 | 52 | Markas PARAPIJONAVICIU | 12 | Grantham | 2:31.46 |
| 5 | 53 | Amy TAYLOR | 14 | Grantham | 2:30.01 |
| 6 | 54 | Annabelle JAY | 14 | Grantham | 2:24.27 |
| Heat Number - 10 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 55 | Isobel ALLSOP | 15 | Grantham | 2:23.80 |
| 2 | 56 | Ellena HOWITT | 14 | Grantham | 2:23.29 |
| 3 | 57 | Jessica - Rose DAVISON | 16 | Grantham | 2:22.49 |
| 4 | 58 | Lucy WILLATTS | 14 | Grantham | 2:19.37 |
| 5 | 59 | Elena ALDENHOFF-KELLY | 17 | Grantham | 2:18.19 |
| 6 | 60 | Isla GRAY | 15 | Grantham | 2:17.08 |
| Heat Number - 11 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 62 | Grace TURNER | 18 | Grantham | 2:11.01 |
| 2 | 64 | Ben CARLYLE | 15 | Grantham | 2:08.74 |
| 3 | 66 | James DOBNEY | 21 | Grantham | 2:03.91 |
| 4 | 65 | Zach HOPKINSON | 16 | Grantham | 2:04.60 |
| 5 | 63 | Daniel DEGNAN | 17 | Grantham | 2:08.76 |
| 6 | 61 | Chloe HOPKINSON | 20 | Grantham | 2:14.22 |