EVENT 301 Open/Male 100m IM - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Joe KHAN | 9 | Berkhamsted | |
| 4 | 3 | Noah HOLLIS | 12 | Verulam | 2:03.15 |
| 5 | 2 | Ethan TREW | 10 | Dunstable | 2:04.13 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 5 | Dexter CLARKE | 9 | Verulam | 2:01.35 |
| 2 | 7 | Henry PETCHEY | 11 | West Suffolk | 1:55.95 |
| 3 | 9 | Logan HESKETT | 9 | Dunstable | 1:45.28 |
| 4 | 11 | Sebastian TERNOUTH | 10 | Verulam | 1:37.76 |
| 5 | 10 | Evan CLARKE | 11 | Verulam | 1:42.05 |
| 6 | 8 | Philippe MARCELO | 10 | Dunstable | 1:53.08 |
| 7 | 6 | Cayden GALLOWAY | 12 | Berkhamsted | 1:59.45 |
| 8 | 4 | Albie CHINNECK | 12 | Berkhamsted | 2:01.46 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 13 | T CAMILOTTI-TITON | 11 | Hatfield | 1:33.85 |
| 2 | 15 | Wai Chun LAU | 12 | Verulam | 1:31.40 |
| 3 | 17 | Kaleb NELDER | 14 | West Suffolk | 1:28.53 |
| 4 | 20 | Noah TAYLOR | 15 | St Ives | 1:26.89 |
| 5 | 19 | Sebastian WICKES | 12 | West Suffolk | 1:27.00 |
| 6 | 16 | Thomas EVANS | 11 | Verulam | 1:31.13 |
| 7 | 14 | Myles BURRIDGE | 11 | St Ives | 1:32.79 |
| 8 | 12 | Jacob KENNEDY | 14 | Linslade | 1:34.63 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 23 | Soufian ABDELRAZEK | 12 | St Ives | 1:25.68 |
| 2 | 28 | Oliver CREASY | 13 | West Suffolk | 1:21.87 |
| 3 | 32 | Samuel CHILDS | 12 | Berkhamsted | 1:16.54 |
| 4 | 35 | Alexander HOWARD | 16 | Berkhamsted | 1:14.98 |
| 5 | 33 | Charles HALLAM | 12 | Harpenden | 1:15.37 |
| 6 | 29 | James EVERETT | 14 | West Suffolk | 1:19.48 |
| 7 | 27 | Finley TERRY | 13 | St Ives | 1:23.93 |
| 8 | 22 | Joshua BEARD | 12 | Verulam | 1:25.72 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 37 | Harry VIDAL-GREENWOOD | 13 | West Suffolk | 1:11.72 |
| 2 | 40 | Arthur SMART | 23 | West Suffolk | 1:08.80 |
| 3 | 41 | Rafe LAWSON | 13 | Berkhamsted | 1:08.54 |
| 4 | 43 | Niccolo CAMILOTTI | 15 | Hatfield | 1:05.78 |
| 5 | 42 | George EVERETT | 16 | West Suffolk | 1:07.09 |
| 6 | 44 | Cem ADALI | 16 | Verulam | 1:08.60 |
| 7 | 38 | George RHODES | 15 | Team Luton | 1:11.41 |
| 8 | 36 | Henry CRIDLAND | 17 | St Ives | 1:14.78 |