EVENT 401 Girl Open 400m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 2 | Emily MARRISON | 12 | Co Leeds | 6:45.00 |
| 3 | 4 | Hannah BROWN | 12 | Co Leeds | 6:31.02 |
| 4 | 6 | Annabel HOWE | 14 | Bo Kirklees | 6:21.20 |
| 5 | 5 | Elizabeth CHRISTIAN | 12 | Io Man | 6:30.00 |
| 6 | 3 | Pinklily TAREK | 11 | Bolton Metro | 6:41.25 |
| 7 | 1 | Imogen JONES | 13 | Bo Kirklees | 6:45.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 8 | Isabella NIXON | 12 | Biddulph | 6:05.30 |
| 1 | 10 | Isabelle HALL | 11 | Co Leeds | 5:59.40 |
| 2 | 12 | Florence DIXON | 11 | Co Leeds | 5:56.90 |
| 3 | 14 | Ella JORDAN | 12 | Co Leeds | 5:53.30 |
| 4 | 16 | Poppy NUTTMAN | 12 | Bo Kirklees | 5:52.60 |
| 5 | 15 | Charlotte MIDDLETON | 13 | Leyland Barr | 5:52.80 |
| 6 | 13 | Mia WROE | 15 | Burnley BOBC | 5:55.84 |
| 7 | 11 | Pollyanna KERSHAW | 12 | Blackpool Aq | 5:57.50 |
| 8 | 9 | Eleanor BRIDGMAN | 14 | Co Wakefield | 6:00.00 |
| 9 | 7 | Darcey BLACKER | 14 | Co Leeds | 6:19.07 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 18 | Honor LUCKHURST | 13 | Preston | 5:50.25 |
| 1 | 20 | Molly NORTON | 12 | Co Leeds | 5:47.40 |
| 2 | 22 | Olivia BALLARD | 14 | Leyland Barr | 5:46.60 |
| 3 | 24 | Ruby ELLIS | 14 | Co Leeds | 5:45.67 |
| 4 | 26 | Jessica SMELT | 15 | Bo Kirklees | 5:38.20 |
| 5 | 25 | Emma WOOD | 14 | Co Leeds | 5:41.16 |
| 6 | 23 | Mia TRAVIS-JONES | 12 | Co Leeds | 5:46.00 |
| 7 | 21 | Robyn HOWARD | 12 | Co Leeds | 5:47.10 |
| 8 | 19 | Elizabeth WARNER | 12 | Co Leeds | 5:49.52 |
| 9 | 17 | Elizabeth ADAM | 12 | Leyland Barr | 5:50.70 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 28 | Matilda ASHCROFT | 14 | Co Leeds | 5:32.40 |
| 1 | 30 | Abigail HEALD | 17 | Co Leeds | 5:30.90 |
| 2 | 32 | Lauren LILLEY | 14 | Co Leeds | 5:19.02 |
| 3 | 34 | Matilda POTTER | 14 | Co Leeds | 5:14.20 |
| 4 | 36 | Darcey CROSSLEY | 14 | Co Leeds | 5:08.26 |
| 5 | 35 | Isabel HANDLEY | 13 | Co Leeds | 5:13.60 |
| 6 | 33 | Evie HARRIS | 14 | Co Leeds | 5:17.85 |
| 7 | 31 | Emily WADE | 14 | Leyland Barr | 5:29.30 |
| 8 | 29 | Jasmine BULLOUGH-TEAL | 15 | Burnley BOBC | 5:32.00 |
| 9 | 27 | Millie PLUMLEY | 14 | Biddulph | 5:38.10 |