EVENT 402 Boys Open 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Ryan Hejraty | 11 | Co Leicester | 2:08.65 |
| 2 | 2 | Ollie Taylor | 11 | Co Leicester | 2:02.54 |
| 3 | 3 | Jack Webb | 10 | Northampton | 1:52.32 |
| 4 | 4 | Emerson-Blu Gupwell | 11 | Co Leicester | 1:38.22 |
| 5 | 5 | Oliver Ashman | 11 | Co Leicester | 1:37.14 |
| 6 | 6 | Oliver Davies | 12 | Leic Peng | 1:35.00 |
| 7 | 7 | Edward Oscroft | 12 | Northampton | 1:34.95 |
| 8 | 8 | Ethan Simmonds | 12 | Co Leicester | 1:34.70 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 9 | Jonathan Shaw | 16 | Leicester Ne | 1:33.42 |
| 2 | 10 | Harry Lucas | 11 | Co Leicester | 1:31.89 |
| 3 | 11 | Eden Wiles | 15 | Northampton | 1:30.87 |
| 4 | 12 | Edun Rowe | 13 | Northampton | 1:19.02 |
| 5 | 13 | Harvey Brind | 13 | Co Leicester | 1:18.75 |
| 6 | 14 | Lewis Fitch | 14 | Co Leicester | 1:14.82 |
| 7 | 15 | Bhaveshsingh Parmessur | 15 | Co Leicester | 1:14.26 |
| 8 | 16 | Lewis Boyd | 13 | Co Leicester | 1:11.49 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 18 | Harry Fleet | 15 | Co Leicester | 1:10.68 |
| 2 | 20 | Henry Knight | 16 | Northampton | 1:08.82 |
| 3 | 22 | Lewis Cotterell | 15 | Co Leicester | 1:06.74 |
| 4 | 24 | Jack Stretton | 17 | Co Leicester | 1:02.93 |
| 5 | 23 | Sean McCann | 16 | Co Leicester | 1:03.88 |
| 6 | 21 | Charlie James | 15 | Co Leicester | 1:06.88 |
| 7 | 19 | Oliver Kang | 15 | Co Leicester | 1:09.32 |
| 8 | 17 | Oliver Oxley | 15 | Co Leicester | 1:10.73 |