EVENT 101 Boy/Girl 13 Yrs/Over 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Ashton WOOLLER | 14 | Bo Barnsley | 7:30.00 |
| 4 | 3 | Francesca HADFIELD | 14 | Bo Barnsley | 6:49.62 |
| 5 | 2 | Annabelle HART | 13 | Co Leeds | 6:50.65 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 5 | Ellen TOAL | 14 | Co Manch Aq | 6:40.00 |
| 1 | 7 | Jake LAWFORD | 14 | Bo Kirklees | 6:25.00 |
| 2 | 9 | Olivia RYAN | 13 | Co Manch Aq | 6:13.19 |
| 3 | 11 | Tylan FLETCHER | 13 | Co Leeds | 6:06.10 |
| 4 | 13 | Alixander LEWIS | 13 | Co Manch Aq | 6:02.07 |
| 5 | 12 | Maddison CARTER | 14 | Co Leeds | 6:04.49 |
| 6 | 10 | Eben COUSIN | 13 | Bo Kirklees | 6:06.78 |
| 7 | 8 | Niamh KHAN | 13 | Co Manch Aq | 6:20.46 |
| 8 | 6 | Hannah BURNS | 14 | Spenborough | 6:30.00 |
| 9 | 4 | Dean NENOV | 13 | Co Leeds | 6:41.70 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 15 | Lucy WIGHTMAN | 15 | Bo Barnsley | 6:00.00 |
| 1 | 17 | Andrew TEALE | 13 | Bo Kirklees | 5:55.00 |
| 2 | 19 | Ellie ROWSON | 14 | York City | 5:50.00 |
| 3 | 21 | Ella MCDERMOTT | 14 | Co Leeds | 5:44.50 |
| 4 | 23 | Luke DYER | 14 | Co Leeds | 5:36.20 |
| 5 | 22 | Eleanor VALENTINE-BULL | 16 | Bo Barnsley | 5:42.00 |
| 6 | 20 | Isla YATES | 14 | York City | 5:46.10 |
| 7 | 18 | Emilia JONES | 15 | York City | 5:52.38 |
| 8 | 16 | Megan MILLS | 14 | York City | 5:57.00 |
| 9 | 14 | Zachary HELM | 13 | Co Leeds | 6:01.40 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 25 | Tin Ho CHEUNG | 14 | Co Leeds | 5:32.70 |
| 1 | 27 | Charlotte SHAW | 14 | Co Leeds | 5:31.80 |
| 2 | 29 | Matilda ASHCROFT | 13 | Co Leeds | 5:27.69 |
| 3 | 31 | William BACON | 16 | Co Leeds | 5:23.87 |
| 4 | 33 | Joseph BURGESS | 15 | Skipton | 5:17.13 |
| 5 | 32 | Benjamin DALE-WOOD | 14 | Thirsk WH | 5:19.90 |
| 6 | 30 | Abigail HEALD | 16 | Co Leeds | 5:25.80 |
| 7 | 28 | Thomas BROOKS | 14 | Spenborough | 5:31.37 |
| 8 | 26 | George CARRY | 14 | Co Leeds | 5:32.50 |
| 9 | 24 | Emma WOOD | 14 | Co Leeds | 5:36.00 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 35 | Sedona REED | 15 | Co Leeds | 5:16.30 |
| 1 | 37 | Matilda POTTER | 13 | Co Leeds | 5:12.40 |
| 2 | 39 | Joseph HALL | 13 | Co Leeds | 5:11.70 |
| 3 | 41 | William HICKLIN | 13 | Co Leeds | 4:56.68 |
| 4 | 43 | Lucas WALIGORA | 17 | York City | 4:44.88 |
| 5 | 42 | Lachlan BEAZLEY | 15 | Altrincham | 4:48.90 |
| 6 | 40 | Gabriel SHEPHERD | 14 | Co Leeds | 5:04.43 |
| 7 | 38 | Charlotte MORETON | 14 | Co Leeds | 5:12.40 |
| 8 | 36 | Mischa COMRIE | 15 | Co Leeds | 5:16.20 |
| 9 | 34 | Elizabeth DIXON | 13 | Co Leeds | 5:17.10 |