EVENT 304 Boy Open 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Neel MEHENDALE | 13 | Co Wakefield | 2:05.40 |
| 3 | 3 | Hogan LAM | 11 | Co Leeds | 1:46.00 |
| 4 | 6 | Layton RICHARDSON | 13 | Chorley Marl | 1:39.40 |
| 5 | 4 | Benjamin HANGULA | 11 | Co Wakefield | 1:45.40 |
| 6 | 2 | Euan CARMODY | 9 | Co Leeds | 1:53.66 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 8 | Olaf GRUDOWSKI | 11 | Co Leeds | 1:38.50 |
| 1 | 10 | Angus YOUNG | 11 | Co Leeds | 1:38.17 |
| 2 | 12 | Harrison WAKE | 10 | Co Leeds | 1:35.00 |
| 3 | 14 | Leo LI | 10 | Co Leeds | 1:34.50 |
| 4 | 16 | Callum FOZARD | 11 | Co Leeds | 1:32.40 |
| 5 | 15 | Noah DARNELL | 11 | Co Leeds | 1:33.30 |
| 6 | 13 | Jamie WEETMAN | 13 | Leyland Barr | 1:34.50 |
| 7 | 11 | Zac EDGE | 9 | Bo Kirklees | 1:36.61 |
| 8 | 9 | Joshua MCMILLAN | 11 | Co Leeds | 1:38.30 |
| 9 | 7 | Rory KING | 12 | Co Leeds | 1:38.95 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 18 | Alfie CRAGGS | 11 | Co Leeds | 1:32.10 |
| 1 | 20 | Abdullah MOKHLISSE | 13 | Co Leeds | 1:28.80 |
| 2 | 22 | Oliver BARRETT | 11 | Co Leeds | 1:26.91 |
| 3 | 24 | William SHEARS | 13 | Chorley Marl | 1:26.18 |
| 4 | 26 | Sebastian HUNTER | 12 | Co Leeds | 1:26.00 |
| 5 | 25 | James FARNAN | 12 | Io Man | 1:26.10 |
| 6 | 23 | Oscar O'DONNELL | 10 | Co Leeds | 1:26.50 |
| 7 | 21 | Ed PEARSON | 11 | Io Man | 1:28.60 |
| 8 | 19 | Benji SUTCLIFFE | 11 | Ramsbottom | 1:29.30 |
| 9 | 17 | Christian CORNELL | 12 | Stokesley | 1:32.10 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 28 | Zach PIERCY | 12 | Co Leeds | 1:24.40 |
| 1 | 30 | Gordon BALLANTYNE | 14 | Leyland Barr | 1:22.85 |
| 2 | 32 | Jacob O'DONNELL | 12 | Co Leeds | 1:20.78 |
| 3 | 34 | Jackson CLARKE | 12 | Co Leeds | 1:19.70 |
| 4 | 36 | Rhys POWNALL | 13 | Leyland Barr | 1:18.60 |
| 5 | 35 | Connor MCCULLEN | 12 | Co Leeds | 1:19.10 |
| 6 | 33 | Reuben HARRISON | 12 | Co Leeds | 1:20.20 |
| 7 | 31 | Reggie SPENCE | 13 | Co Leeds | 1:21.80 |
| 8 | 29 | Reggie SIMCOCK | 13 | Biddulph | 1:23.90 |
| 9 | 27 | George BELLWOOD | 14 | Co Wakefield | 1:25.00 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 38 | Alfie YOUNG | 13 | Co Leeds | 1:17.50 |
| 1 | 40 | Noah CARTLIDGE | 12 | Biddulph | 1:15.90 |
| 2 | 42 | Andrew TEALE | 14 | Bo Kirklees | 1:14.90 |
| 3 | 44 | Arthur OWENS | 13 | Co Leeds | 1:14.10 |
| 4 | 46 | Luke DYER | 15 | Co Leeds | 1:11.78 |
| 5 | 45 | Owen CARMODY | 12 | Co Leeds | 1:13.02 |
| 6 | 43 | Owen WILSON | 12 | Burnley BOBC | 1:14.40 |
| 7 | 41 | Oliver BROMPTON | 14 | Co Leeds | 1:15.23 |
| 8 | 39 | Hayden LAM | 12 | Co Leeds | 1:17.10 |
| 9 | 37 | Alex OLCHOWIK | 13 | Co Leeds | 1:18.00 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 49 | Ethan COWELL | 13 | Co Leeds | 1:10.50 |
| 1 | 52 | Joseph HALL | 14 | Co Leeds | 1:09.80 |
| 2 | 54 | Andrew ONOFREI | 14 | StaffordApex | 1:08.70 |
| 3 | 56 | Jamie BALL | 18 | Burnley BOBC | 1:08.30 |
| 4 | 58 | Tin Ho CHEUNG | 14 | Co Leeds | 1:07.90 |
| 5 | 57 | Matthew JAMES | 14 | Co Leeds | 1:08.20 |
| 6 | 55 | Oliver STEELE | 15 | Co Leeds | 1:08.40 |
| 7 | 53 | Oscar HODGSON | 13 | Carlisle Aq | 1:09.40 |
| 8 | 50 | Patrick NEILL | 14 | Co Leeds | 1:10.30 |
| 9 | 48 | Harry SENIOR | 15 | Co Leeds | 1:11.60 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 60 | Callum RAVEN | 14 | Co Leeds | 1:06.50 |
| 1 | 62 | Eber MEYER CLAYTON | 16 | Stretford | 1:05.70 |
| 2 | 64 | Daniel CLIPSHAM | 16 | Co Wakefield | 1:05.49 |
| 3 | 66 | George BROOKS | 15 | Co Leeds | 1:05.13 |
| 4 | 68 | William HICKLIN | 13 | Co Leeds | 1:04.35 |
| 5 | 67 | Ethan STANNARD | 17 | Stokesley | 1:04.72 |
| 6 | 65 | Jaeden LIM | 15 | Stretford | 1:05.40 |
| 7 | 63 | Jad IDRIS | 16 | Co Leeds | 1:05.70 |
| 8 | 61 | Samuel JACKSON | 14 | Bo Kirklees | 1:06.43 |
| 9 | 59 | Oscar DEVAAL | 13 | Biddulph | 1:07.16 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 70 | Daniel RANSOM | 14 | Co Leeds | 1:04.00 |
| 1 | 72 | Cohen STEPHENSON | 17 | Co Leeds | 1:01.21 |
| 2 | 74 | Ben SHELTON | 18 | Co Leeds | 59.49 |
| 3 | 76 | Matthew JUST | 14 | Co Leeds | 58.90 |
| 4 | 78 | Charlie BROOME | 18 | Co Leeds | 57.32 |
| 5 | 77 | Gabriel SHEPHERD | 14 | Co Leeds | 58.85 |
| 6 | 75 | James ROBINSON | 17 | Co Leeds | 59.31 |
| 7 | 73 | Oliver WHITTLESTON | 15 | Co Leeds | 1:00.64 |
| 8 | 71 | Samuel SUTCLIFFE | 13 | Ramsbottom | 1:03.00 |
| 9 | 69 | Leo TAYLOR | 16 | Leyland Barr | 1:04.20 |