EVENT 201 Mixed 200m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Francesca MORGAN | 11 | Grantham | 5:30.00 |
| 3 | 2 | Evangeline KINNEAR | 11 | Grantham | 5:03.58 |
| 4 | 3 | Louis THOMPSON | 9 | Grantham | 5:00.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Abigail TAYLOR | 10 | Grantham | 4:32.64 |
| 2 | 5 | Tilly WASKETT-BOOTH | 8 | Grantham | 4:30.00 |
| 3 | 6 | Emily CLAYTON | 10 | Grantham | 4:21.74 |
| 4 | 7 | Emmeline GLEAVE | 9 | Grantham | 4:20.00 |
| 5 | 8 | Annabel HILLSON | 9 | Grantham | 4:20.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 9 | Juliette KIM | 9 | Grantham | 4:10.00 |
| 2 | 10 | Matilda MCDONNELL | 11 | Grantham | 4:09.13 |
| 3 | 11 | Madeline SURTEES | 12 | Grantham | 4:05.12 |
| 4 | 12 | Elliot GLEAVE | 11 | Grantham | 4:04.81 |
| 5 | 13 | Hollie-Anne CROOK | 10 | Grantham | 4:01.10 |
| 6 | 14 | Ella KHAMA | 10 | Grantham | 3:57.46 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 15 | Markas PARAPIJONAVICIU | 11 | Grantham | 3:52.01 |
| 2 | 16 | Juliette KING | 12 | Grantham | 3:51.13 |
| 3 | 17 | Isabelle CLAYTON | 12 | Grantham | 3:49.96 |
| 4 | 18 | Elisabeth KINNEAR | 14 | Grantham | 3:47.49 |
| 5 | 19 | Octavia SHEARN | 12 | Grantham | 3:44.58 |
| 6 | 20 | Ava-Grace GREGORY | 12 | Grantham | 3:41.51 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 21 | Leo BARNETT | 12 | Grantham | 3:41.33 |
| 2 | 22 | Jake MCGHEE | 14 | Grantham | 3:40.00 |
| 3 | 23 | Thomas KINNEAR | 13 | Grantham | 3:39.10 |
| 4 | 24 | George LEONARD | 12 | Grantham | 3:38.31 |
| 5 | 25 | Lucy ABBOTT | 12 | Grantham | 3:30.16 |
| 6 | 26 | Daisy CANTILLON | 12 | Grantham | 3:30.00 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 27 | Henry DOLAN | 11 | Grantham | 3:27.90 |
| 2 | 28 | Lizzy LERESCHE HANDS | 13 | Grantham | 3:27.76 |
| 3 | 29 | Ellena HOWITT | 13 | Grantham | 3:26.25 |
| 4 | 30 | Elena ALDENHOFF-KELLY | 16 | Grantham | 3:23.40 |
| 5 | 31 | Mia PARAPIJONAVICIUTE | 15 | Grantham | 3:21.84 |
| 6 | 32 | Annabelle JAY | 13 | Grantham | 3:19.47 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 33 | Jessica - Rose DAVISON | 15 | Grantham | 3:14.96 |
| 2 | 34 | Lucy WILLATTS | 13 | Grantham | 3:12.64 |
| 3 | 35 | Ben CARLYLE | 14 | Grantham | 3:11.38 |
| 4 | 36 | Emilie WEBB | 14 | Grantham | 3:00.60 |
| 5 | 37 | Amy TAYLOR | 13 | Grantham | 3:00.55 |
| 6 | 38 | Megan BROWN | 15 | Grantham | 2:56.41 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 40 | Grace TURNER | 17 | Grantham | 2:50.06 |
| 2 | 42 | Jacob FISH | 15 | Grantham | 2:37.54 |
| 3 | 44 | Zach HOPKINSON | 15 | Grantham | 2:30.05 |
| 4 | 43 | George BERWICK | 21 | Grantham | 2:30.71 |
| 5 | 41 | Daniel DEGNAN | 16 | Grantham | 2:47.09 |
| 6 | 39 | Sophie WARD | 15 | Grantham | 2:53.32 |