EVENT 307 Boy Open 100m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 2 | Evan JOHNSON | 12 | Derventio | 1:22.50 |
| 3 | 4 | Jack BIGNELL | 13 | Northampton | 1:13.75 |
| 4 | 3 | Jacob BRIERS | 13 | Deepings | 1:16.00 |
| 5 | 1 | Jack HURRY | 12 | Northampton | 1:24.29 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | Oliver STONE | 13 | Derventio | 1:07.28 |
| 2 | 8 | Harry CHANDLER | 13 | Royal Wolv | 1:06.40 |
| 3 | 10 | Jean-Luc LOVELL-PASCAL | 16 | Royal Wolv | 1:03.90 |
| 4 | 9 | Harry CARDELL | 17 | Deepings | 1:05.70 |
| 5 | 7 | Finn DRYSDALE | 16 | Royal Wolv | 1:07.14 |
| 6 | 5 | Lewis HICKMAN | 14 | Royal Wolv | 1:12.54 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 12 | Oliver OSBORNE | 14 | Derventio | 1:03.20 |
| 2 | 15 | Razvan GRUMAZESCU | 17 | Northampton | 1:01.95 |
| 3 | 17 | Joshua VANCE | 18 | Northampton | 1:00.66 |
| 4 | 16 | Henry FRANCIS | 19 | Co Derby | 1:01.50 |
| 5 | 14 | Andrew JONES | 17 | Royal Wolv | 1:02.01 |
| 6 | 11 | Sami PRYSOR | 14 | Royal Wolv | 1:03.70 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 19 | Deen AHMED | 17 | Royal Wolv | 1:00.24 |
| 2 | 21 | Liam DAWSON | 16 | Royal Wolv | 59.26 |
| 3 | 23 | Finley BUNHEJEE | 16 | Derventio | 57.40 |
| 4 | 22 | Harvey FREEMAN | 17 | Northampton | 58.50 |
| 5 | 20 | James SHEVCHENKO | 16 | Royal Wolv | 1:00.09 |
| 6 | 18 | Benjamin TWYNHAM | 16 | Co Derby | 1:00.51 |