EVENT 302 Open/Male MC 50m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 3 | 1 | Roan Brennan | 18 | S10 | GBR - BAST | |
| 4 | 2 | Arnaut Vandenabeele | 17 | S10 | BELGIUM | |
| 5 | 3 | Theo Reynolds | 17 | S6 | Barnstaple | 44.80 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 5 | Isaac Johnstone | 18 | S7 | Bo Kirklees | 41.10 |
| 1 | 4 | Archie Hare | 16 | S11 | RichmondDale | 41.12 |
| 2 | 6 | Declan Cassells | 17 | S9 | Eastkilbride | 38.13 |
| 3 | 7 | Bruce Dee | 18 | S6 | GBR - NHNA | 35.89 |
| 4 | 8 | Max Davies | 17 | S8 | Worksop | 35.63 |
| 5 | 9 | Noah Burden | 16 | S9 | Satellite | 35.32 |
| 6 | 10 | Aidan Stanbrook | 17 | S10 | Winchester | 33.81 |
| 7 | 11 | Akaash Das | 16 | S8 | Oswestry Ott | 33.62 |
| 8 | 12 | Zach Shattuck | 28 | S6 | USA | 33.33 |
| 9 | 13 | Yannick Eckart | 21 | S9 | GERMANY | 32.20 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Cat | Club | Time |
| 0 | 15 | Darren Paredes Flores | 19 | S10 | SurreyUni SC | 31.30 |
| 1 | 14 | Tom Rust | 35 | S12 | MwayMaritime | 31.54 |
| 2 | 16 | Felix Cowan | 22 | S9 | CANADA | 30.60 |
| 3 | 17 | Zack Sturgess | 17 | S10 | Bourmth Coll | 30.15 |
| 4 | 18 | Andreas Onea | 32 | S8 | AUSTRIA | 30.12 |
| 5 | 19 | Evan Austin | 32 | S7 | USA | 28.98 |
| 6 | 20 | Rogier Dorsman | 25 | S11 | NETHERLANDS | 27.99 |
| 7 | 21 | JoseAntonio MariAlcara | 36 | S9 | SPAIN | 27.52 |
| 8 | 22 | Alexander Elliot | 28 | S10 | CANADA | 27.20 |
| 9 | 23 | Malte Braunschweig | 24 | S9 | GERMANY | 27.14 |