EVENT 407 Boys Open 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Jasper DE GLOPPER | 12 | Warrington W | 1:28.87 |
| 4 | 3 | Theo SWANN | 13 | Rotherham Mo | 1:15.12 |
| 5 | 2 | Zach PIERCY | 13 | Co Leeds | 1:28.81 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 5 | Jackson CLARKE | 13 | Co Leeds | 1:17.82 |
| 1 | 7 | Christian O'CONNELL | 14 | Stockport Mo | 1:19.90 |
| 2 | 9 | James THOMSON | 14 | Co Leeds | 1:14.43 |
| 3 | 11 | Max PEARSON | 14 | Wigan BEST | 1:14.36 |
| 4 | 13 | Alfie YOUNG | 14 | Co Leeds | 1:12.33 |
| 5 | 12 | Frank LAMB | 14 | South Lincs | 1:13.46 |
| 6 | 10 | James VAUGHAN | 13 | Wigan BEST | 1:13.89 |
| 7 | 8 | Harry MOORE | 14 | Stockport Mo | 1:12.70 |
| 8 | 6 | Alex OLCHOWIK | 14 | Co Leeds | 1:12.63 |
| 9 | 4 | Oliver PEARSON | 14 | Wigan BEST | 1:17.51 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 15 | Luke DYER | 16 | Co Leeds | 1:11.28 |
| 1 | 17 | Jake ADAMS | 16 | Louth | DN:C. |
| 2 | 19 | Joseph BALL | 15 | Preston | 1:06.92 |
| 3 | 21 | Oliver WINTER | 18 | Stocksbridge | 1:05.08 |
| 4 | 23 | Bow GOMERSALL | 14 | Rotherham Mo | DN:C. |
| 5 | 22 | Adam COTTERELL | 15 | Altrincham | 1:07.62 |
| 6 | 20 | Eben COUSIN | 14 | Bo Kirklees | 1:08.74 |
| 7 | 18 | Andrew TEALE | 15 | Bo Kirklees | 1:08.46 |
| 8 | 16 | Stefano FIORE | 16 | South Lincs | 1:09.95 |
| 9 | 14 | Owen CARMODY | 13 | Co Leeds | 1:12.43 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 25 | Leon BAILEY | 17 | Louth | 1:09.63 |
| 1 | 27 | Shea WHITELEY | 17 | Ramsbottom | 1:04.23 |
| 2 | 29 | Oliver STEELE | 16 | Co Leeds | 1:07.63 |
| 3 | 31 | Jonathon WATERS | 15 | Preston | DN:C. |
| 4 | 33 | Louie ENNIS | 15 | Bo Barnsley | 1:03.95 |
| 5 | 32 | Lachlan MUNRO | 16 | Bo Kirklees | 1:06.22 |
| 6 | 30 | Hayden SOLE | 16 | Preston | DN:C. |
| 7 | 28 | Daniel WILKS | 16 | Leamington | 1:07.99 |
| 8 | 26 | Alfie OWEN | 14 | Wigan BEST | 1:05.97 |
| 9 | 24 | Harry SENIOR | 16 | Co Leeds | 1:08.28 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 35 | Noah HARRISON | 18 | Stockport Mo | 1:06.93 |
| 1 | 37 | Callum RAVEN | 15 | Co Leeds | 1:05.79 |
| 2 | 39 | Jack MCCLELLAND | 16 | Bo Kirklees | 1:05.39 |
| 3 | 41 | Alfie BISBY | 16 | South Lincs | DN:C. |
| 4 | 43 | Jack WHITE | 17 | Warrington W | 1:04.39 |
| 5 | 42 | Devon FURNEAUX-KNIGHT | 15 | Co Salford | 1:07.19 |
| 6 | 40 | Axel MARTIN | 16 | Leamington | 1:04.23 |
| 7 | 38 | Samuel HILL | 14 | Co Leeds | 1:06.11 |
| 8 | 36 | Michael GILLESPIE | 15 | Altrincham | 1:05.62 |
| 9 | 34 | Tin Ho CHEUNG | 15 | Co Leeds | 1:08.40 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 47 | Michael WU | 15 | Altrincham | 1:05.97 |
| 1 | 53 | Thomas WOOFFINDIN | 14 | Co Leeds | 1:01.32 |
| 2 | 59 | Owen WESTWOOD | 19 | Wyre Forest | 1:03.36 |
| 3 | 65 | James ROBINSON | 18 | Co Leeds | 58.97 |
| 4 | 71 | Matthew JUST | 15 | Co Leeds | 58.59 |
| 5 | 68 | Frankie DOCKING-SMITH | 19 | Stockport Mo | DN:C. |
| 6 | 62 | Cody INGRAM | 17 | Bo Barnsley | 1:01.63 |
| 7 | 56 | Berdan ORDEK | 15 | Warrington W | 1:01.19 |
| 8 | 50 | Joseph ASHLEY | 15 | Warrington W | 1:00.83 |
| 9 | 44 | Jack DENWOOD | 17 | Rotherham Mo | 1:03.60 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 48 | Dylan FUNG | 16 | Stockport Mo | 1:03.12 |
| 1 | 54 | Oliver PARRY | 15 | Aquabears | DN:C. |
| 2 | 60 | Owen WHITELEY | 17 | Ramsbottom | 1:00.70 |
| 3 | 66 | Davey UNWIN | 17 | Co Manch Aq | DN:C. |
| 4 | 72 | Gabriel SHEPHERD | 15 | Co Leeds | 58.99 |
| 5 | 69 | Sam SMITH | 16 | Skipton | 58.47 |
| 6 | 63 | Oliver WHITTLESTON | 16 | Co Leeds | 1:02.50 |
| 7 | 57 | Charlie ROUNCE | 16 | Leamington | 1:00.09 |
| 8 | 51 | Oscar GOLDSMITH | 15 | South Lincs | 1:03.41 |
| 9 | 45 | Ruben ANDERSON | 14 | Co Sheffield | 1:04.19 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 49 | Joe BURGESS | 16 | Skipton | 1:04.28 |
| 1 | 55 | Oli BOTTOMLEY | 15 | Co Salford | 1:01.46 |
| 2 | 61 | Daniel JACKSON | 17 | Bo Kirklees | 1:01.63 |
| 3 | 67 | Jack JENKINSON | 17 | Skipton | DN:C. |
| 4 | 73 | Charlie BROOME | 19 | Co Leeds | 56.46 |
| 5 | 70 | Tom MCCABE | 18 | Stockport Mo | 59.30 |
| 6 | 64 | Thomas HUDSON | 16 | Nuneaton | 1:01.21 |
| 7 | 58 | Dominic SIMPSON | 17 | Nuneaton | 59.19 |
| 8 | 52 | Leo TAYLOR | 17 | Leyland Barr | 1:02.71 |
| 9 | 46 | Jad IDRIS | 17 | Co Leeds | 1:03.05 |