EVENT 201 Boy/Girl 12 Yrs/Under 400m Free. - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Paige BORLAND | 10 | Bo Kirklees | 7:17.06 |
| 3 | 3 | Oscar HUSSEY | 10 | Co Leeds | 6:40.00 |
| 4 | 5 | Demilade AYEMOWA | 12 | Co Leeds | 6:36.42 |
| 5 | 4 | Robson HART | 9 | Co Leeds | 6:40.00 |
| 6 | 2 | Ellis HARGREAVES | 10 | Co Leeds | 6:50.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 7 | Thomas HORNE | 11 | Co Leeds | 6:30.00 |
| 1 | 9 | Alfie CRAGGS | 11 | Co Leeds | 6:30.00 |
| 2 | 11 | Stellan MCDONALD | 12 | Bo Kirklees | 6:24.50 |
| 3 | 13 | Poppy GILBERT | 9 | Co Leeds | 6:15.00 |
| 4 | 15 | Elizabeth BOND | 10 | Co Leeds | 6:11.40 |
| 5 | 14 | Hogan LAM | 10 | Co Leeds | 6:11.60 |
| 6 | 12 | Max CLARK | 10 | Co Leeds | 6:18.70 |
| 7 | 10 | Eloise ANDREASEN | 12 | Co Leeds | 6:29.00 |
| 8 | 8 | Mia THOMSON | 10 | Co Leeds | 6:30.00 |
| 9 | 6 | Emily MARRISON | 12 | Co Leeds | 6:31.90 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 17 | Millie HERBERT | 12 | Bo Barnsley | 6:06.26 |
| 1 | 19 | Owen TEMPEST | 10 | Co Leeds | 6:02.30 |
| 2 | 21 | Amelie COTTERILL | 10 | Co Leeds | 6:02.10 |
| 3 | 23 | Hannah BROWN | 12 | Co Leeds | 6:00.00 |
| 4 | 25 | Sebastian HUNTER | 12 | Co Leeds | 5:58.39 |
| 5 | 24 | Daniel TEW | 11 | York City | 6:00.00 |
| 6 | 22 | James ASHCROFT | 10 | Co Leeds | 6:00.10 |
| 7 | 20 | Isla CALLARD | 12 | York City | 6:02.29 |
| 8 | 18 | Amelia MATSON | 10 | Co Leeds | 6:05.70 |
| 9 | 16 | Martha FIRTH | 12 | Bo Kirklees | 6:07.92 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 27 | Rory KING | 12 | Co Leeds | 5:53.50 |
| 1 | 29 | Lucas MORTON | 12 | Bo Barnsley | 5:49.80 |
| 2 | 31 | Isabelle HUSSEY | 12 | Wetherby | 5:45.00 |
| 3 | 33 | Ella COLEMAN | 11 | Co Leeds | 5:40.20 |
| 4 | 35 | Isabelle KING | 12 | Co Leeds | 5:35.30 |
| 5 | 34 | Isabelle HALL | 11 | Co Leeds | 5:35.90 |
| 6 | 32 | Emily SMITH | 12 | Co Manch Aq | 5:44.36 |
| 7 | 30 | Thomas HALL | 12 | Co Manch Aq | 5:46.84 |
| 8 | 28 | Hudson SMITH | 11 | Co Leeds | 5:52.70 |
| 9 | 26 | Noah DARNELL | 11 | Co Leeds | 5:57.80 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 37 | Florence DIXON | 11 | Co Leeds | 5:31.40 |
| 1 | 39 | Jackson CLARKE | 12 | Co Leeds | 5:20.60 |
| 2 | 41 | Oliver BARRETT | 11 | Co Leeds | 5:19.80 |
| 3 | 43 | Matei STOICESCU | 12 | Co Leeds | 5:14.10 |
| 4 | 45 | Hayden LAM | 12 | Co Leeds | 4:53.60 |
| 5 | 44 | Elizabeth WARNER | 11 | Co Leeds | 5:04.32 |
| 6 | 42 | M AZANA-BALL | 11 | Co Leeds | 5:19.00 |
| 7 | 40 | Halo BENTLEY-HICKS | 11 | Co Leeds | 5:20.20 |
| 8 | 38 | Shae BRYANT | 11 | Co Leeds | 5:28.20 |
| 9 | 36 | Ellie AKHTAR | 12 | Co Leeds | 5:34.30 |