EVENT 201 Boy/Girl 12 Yrs/Under 400m Free. - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 2 | Oliver BARRETT | 10 | Co Leeds | 6:55.46 |
| 4 | 4 | Florence DIXON | 10 | Co Leeds | 6:44.74 |
| 5 | 3 | Seth JONES | 10 | Co Leeds | 6:44.95 |
| 6 | 1 | Millie HERBERT | 11 | Bo Barnsley | 7:44.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 6 | Alfie YOUNG | 12 | Co Leeds | 6:31.78 |
| 1 | 9 | Aira WILKINSON | 12 | Co Leeds | 6:22.33 |
| 2 | 11 | Thomas HALL | 11 | Co Manch Aq | 6:17.03 |
| 3 | 13 | Zach PIERCY | 11 | Co Leeds | 6:12.51 |
| 4 | 15 | Scarlett CLARKSON | 11 | Co Leeds | 6:10.30 |
| 5 | 14 | Jessica WOODS | 11 | Co Leeds | 6:10.33 |
| 6 | 12 | Amelie RICHARDSON | 12 | Conwy | 6:12.81 |
| 7 | 10 | Elizabeth WARNER | 10 | Co Leeds | 6:19.13 |
| 8 | 7 | Elizabeth BOND | 9 | Co Leeds | 6:31.01 |
| 9 | 5 | Isabelle KING | 11 | Co Leeds | 6:40.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 17 | Jackson CLARKE | 11 | Co Leeds | 6:07.72 |
| 1 | 19 | Alexander ROWE | 12 | Co Manch Aq | 6:05.00 |
| 2 | 21 | Mia TRAVIS-JONES | 11 | Co Leeds | 6:04.93 |
| 3 | 23 | Ethan BENT | 11 | Co Manch Aq | 6:00.34 |
| 4 | 25 | Holly HARRISON | 11 | Co Leeds | 5:59.72 |
| 5 | 24 | Sophia THOM | 11 | York City | 6:00.00 |
| 6 | 22 | Patrick O'HARA | 11 | Co Leeds | 6:03.86 |
| 7 | 20 | Poppy NUTTMAN | 11 | Spenborough | 6:05.00 |
| 8 | 18 | Olivia PAINE | 12 | Co Leeds | 6:06.38 |
| 9 | 16 | Darcey BLACKER | 12 | Co Leeds | 6:09.58 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 27 | Molly NORTON | 11 | Co Leeds | 5:46.24 |
| 1 | 29 | Jacob O'DONNELL | 11 | Co Leeds | 5:42.81 |
| 2 | 31 | Matilda POTTER | 12 | Co Leeds | 5:22.84 |
| 3 | 34 | Alice AITKEN | 12 | York City | 5:13.09 |
| 4 | 36 | Megan TRAVIS | 12 | Co Leeds | 5:09.70 |
| 5 | 35 | Asher MAXFIELD | 12 | Co Leeds | 5:12.22 |
| 6 | 32 | Caitlyn SMITH | 12 | Co Leeds | 5:21.46 |
| 7 | 30 | Owen CARMODY | 11 | Co Leeds | 5:31.40 |
| 8 | 28 | Zachary HELM | 12 | Co Leeds | 5:43.00 |
| 9 | 26 | James THOMSON | 11 | Co Leeds | 5:48.90 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 38 | Liliah VINCENT | 12 | Co Leeds | 5:08.47 |
| 1 | 40 | Maxwell FORD | 12 | Co Leeds | 5:00.20 |
| 2 | 42 | William HICKLIN | 12 | Co Leeds | 4:57.80 |
| 3 | 45 | Sophie RAMSHAW | 12 | Co Leeds | 4:49.41 |
| 4 | 47 | Evie CLARE | 12 | Co Manch Aq | 4:38.53 |
| 5 | 46 | Millie THRELFALL | 12 | Co Leeds | 4:48.84 |
| 6 | 43 | Joseph HALL | 12 | Co Leeds | 4:50.47 |
| 7 | 41 | Elizabeth DIXON | 12 | Co Leeds | 4:58.19 |
| 8 | 39 | Isabel HANDLEY | 12 | Co Leeds | 5:07.65 |
| 9 | 37 | Chloe MALONEY | 12 | Co Leeds | 5:08.72 |