EVENT 403 Mixed 13 Yrs/Over 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 2 | Sophie OWEN | 13 | | Lincoln Vulc | 1:38.00 |
| 2 | 4 | Esme PEARSON | 13 | | Bo Barnsley | 1:24.20 |
| 3 | 6 | Ellis HARGREAVES | 13 | | Co Leeds | 1:23.10 |
| 4 | 8 | Iris FRENCH | 14 | | Lincoln Vulc | 1:22.30 |
| 5 | 7 | Brooke HEMMINGS | 15 | | Lincoln Vulc | 1:22.65 |
| 6 | 5 | Livia STACEY | 13 | | Co Leeds | 1:23.30 |
| 7 | 3 | Isla SCOTT | 14 | | Lincoln Vulc | 1:29.02 |
| 8 | 1 | Jessica MCLEAN | 14 | | Bo Barnsley | 1:38.17 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 11 | Amelia MATSON | 13 | | Co Leeds | 1:20.80 |
| 2 | 13 | Hayley PANG | 14 | | Co Bradford | 1:20.30 |
| 3 | 15 | Olaf GRUDOWSKI | 13 | | Co Leeds | 1:17.68 |
| 4 | 17 | Abdullah MOKHLISSE | 16 | | Chapeltown | 1:16.30 |
| 5 | 16 | Lucas GOODWIN | 14 | | Lincoln Vulc | 1:17.40 |
| 6 | 14 | Maisie BARKER | 13 | | Co Bradford | 1:19.30 |
| 7 | 12 | Dylan WARREN | 13 | | Co Bradford | 1:20.70 |
| 8 | 10 | Owen TEMPEST | 14 | S14 | Co Leeds | 1:21.24 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 19 | Grace BLAIR | 18 | | Co Wakefield | 1:13.60 |
| 2 | 21 | Eliza NAGLIK | 15 | | Co Bradford | 1:13.38 |
| 3 | 23 | Megan LAMB | 15 | | Lincoln Vulc | 1:12.98 |
| 4 | 25 | Jacob JONES | 13 | | Co Leeds | 1:12.40 |
| 5 | 24 | Evelyn GLEDHILL | 16 | | Co Bradford | 1:12.90 |
| 6 | 22 | Evie THORPE | 13 | | Co Leeds | 1:13.00 |
| 7 | 20 | Grace BLAIR | 18 | | Co Wakefield | 1:13.60 |
| 8 | 18 | Russell GREEN | 14 | | Bo Barnsley | 1:15.75 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 27 | Dimosthenis MAGOULAS | 15 | | Bo Barnsley | 1:10.38 |
| 2 | 29 | Mia TRAVIS-JONES | 15 | | Co Leeds | 1:08.57 |
| 3 | 31 | Joshua GUY | 14 | | Bo Barnsley | 1:06.67 |
| 4 | 33 | Axel ROBINSON | 15 | | Sheffield C | 1:05.25 |
| 5 | 32 | Robbie DUFF | 14 | | Lincoln Vulc | 1:05.30 |
| 6 | 30 | Ruby BYRNE | 17 | | Co Bradford | 1:07.14 |
| 7 | 28 | Joshua TOWNSON | 17 | | Co Bradford | 1:10.00 |
| 8 | 26 | Zach CARNEY | 14 | | Co Bradford | 1:11.40 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 1 | 35 | Elizabeth DIXON | 16 | | Co Leeds | 1:05.20 |
| 2 | 37 | Matei STOICESCU | 15 | | Co Leeds | 1:03.50 |
| 3 | 39 | Kai MAYERS | 15 | | Co Bradford | 1:01.30 |
| 4 | 41 | Samuel NAYLOR | 25 | | Co Bradford | 1:00.00 |
| 5 | 40 | Dexter WOODWARD | 16 | | Co Bradford | 1:01.10 |
| 6 | 38 | Callum RAVEN | 16 | | Co Bradford | 1:02.30 |
| 7 | 36 | Jasmine SHAY | 16 | | Co Bradford | 1:04.10 |
| 8 | 34 | Ava CONNELL | 16 | | Co Leeds | 1:05.20 |