EVENT 207 Open/Male 50m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Daniele ROCCI | 11 | York City | 1:00.00 |
| 3 | 3 | Sam HODGKINS | 10 | York City | 58.90 |
| 4 | 2 | Lewis FLEET | 9 | York City | 59.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Caleb BURTON | 10 | York City | 56.40 |
| 2 | 7 | Alfie HARGREAVES | 9 | York City | 52.84 |
| 3 | 9 | Savva SMAZNOV-VERTII | 10 | York City | 48.18 |
| 4 | 8 | Jake GINLEY | 12 | York City | 52.00 |
| 5 | 6 | S ALEXANDER-HYMERS | 11 | York City | 55.00 |
| 6 | 4 | Reuben GROVES | 11 | York City | 58.90 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 11 | Henry FORD | 10 | York City | 45.95 |
| 2 | 13 | Bertie RODGERS | 10 | York City | 40.01 |
| 3 | 15 | William SIMPSON | 10 | York City | 36.80 |
| 4 | 14 | Coby FERNANDO | 13 | York City | 37.18 |
| 5 | 12 | Fox KAUFMAN | 10 | York City | 41.29 |
| 6 | 10 | Oliver KING | 9 | York City | 47.00 |