EVENT 21 Open/Male 09 /Over 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 2 | Oliver Murashe | 10 | Eckington | 2:20.00 |
| 3 | 4 | Aleksander Conway | 11 | Stocksbridge | 2:04.80 |
| 4 | 6 | Maximilian McDonald | 12 | KingstonHull | 2:01.20 |
| 5 | 5 | Ben Crosby | 11 | Sheffield C | 2:01.77 |
| 6 | 3 | Montgomery Thomas | 9 | Welshpool | 2:15.00 |
| 7 | 1 | Zachary Stevens | 10 | Sheffield C | 2:20.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 8 | Rupert Maude | 10 | Rotherham Mo | 1:50.00 |
| 1 | 10 | Vadym Vynogrodskyy | 14 | KingstonHull | 1:41.30 |
| 2 | 12 | Noah Kirton | 10 | Rotherham Mo | 1:38.00 |
| 3 | 14 | Isaac Broadhead | 9 | Rotherham Mo | 1:36.10 |
| 4 | 16 | Freddie Fitzpatrick | 12 | ORCA | 1:35.00 |
| 5 | 15 | Joseph Williamson | 13 | Darlington | 1:35.00 |
| 6 | 13 | Y Smolinschi | 14 | Darlington | 1:37.10 |
| 7 | 11 | Adam Pegg | 13 | Etwall | 1:39.40 |
| 8 | 9 | Oliver Ward | 9 | KingstonHull | 1:49.90 |
| 9 | 7 | Edward Wright | 9 | KingstonHull | 1:56.40 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 18 | Alfred Farr | 11 | Rotherham Mo | 1:33.00 |
| 1 | 20 | Harry Waring | 15 | Etwall | 1:30.00 |
| 2 | 22 | Oscar Bouras | 11 | Newcastle St | 1:27.10 |
| 3 | 24 | Joseph Knowles | 11 | Darlington | 1:23.60 |
| 4 | 26 | Dominic Heathcote | 20 | Etwall | 1:22.30 |
| 5 | 25 | Archie Collingridge | 14 | Welshpool | 1:23.20 |
| 6 | 23 | Kingsley Lam | 13 | Newcastle St | 1:26.50 |
| 7 | 21 | Finlay Robson | 11 | Rotherham Mo | 1:30.00 |
| 8 | 19 | Alexander Mearns | 14 | Sheffield C | 1:32.90 |
| 9 | 17 | Jonny Oliver | 12 | Eckington | 1:33.10 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 28 | Alexander Aw | 13 | Newcastle St | 1:20.12 |
| 1 | 30 | Henry Middleton | 13 | Co Wakefield | 1:18.20 |
| 2 | 32 | Luke Blackburn | 13 | Rotherham Mo | 1:15.90 |
| 3 | 34 | Lucas Robson | 14 | Rotherham Mo | 1:15.70 |
| 4 | 36 | Hugo Bouras | 13 | Newcastle St | 1:15.00 |
| 5 | 35 | Oliver Nutt | 16 | Etwall | 1:15.10 |
| 6 | 33 | Matthew Pegg | 16 | Etwall | 1:15.90 |
| 7 | 31 | Valentine Staniland | 13 | Rotherham Mo | 1:17.80 |
| 8 | 29 | Ollie Maude | 14 | Rotherham Mo | 1:19.20 |
| 9 | 27 | Ryan Burnside | 14 | Welshpool | 1:21.50 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 0 | 38 | Tao Pawson | 16 | Stocksbridge | 1:12.40 |
| 1 | 40 | Lewis Davies | 16 | Nofio P.B.P | 1:11.34 |
| 2 | 42 | Oliver Moore | 16 | Stocksbridge | 1:08.60 |
| 3 | 44 | Oliver Vernon | 19 | Etwall | 1:05.41 |
| 4 | 46 | Jack Denwood | 19 | Rotherham Mo | 59.61 |
| 5 | 45 | Danny Barron | 17 | Etwall | 1:01.20 |
| 6 | 43 | Edward Rose | 13 | Rotherham Mo | 1:07.00 |
| 7 | 41 | Reuben Ragsdale-Miller | 16 | Harrogate | 1:08.70 |
| 8 | 39 | Tegid Jones | 15 | Nofio P.B.P | 1:12.20 |
| 9 | 37 | Frederick Williams | 13 | Eckington | 1:13.20 |