EVENT 309 Open/Male 100m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 2 | Zaran SHAKIR | 11 | Team Luton | |
| 4 | 4 | Harry MAKIN | 10 | Dunstable | |
| 5 | 3 | Noah WIGGS | 10 | Berkhamsted | |
| 6 | 1 | Benjamin CHILDS | 9 | Berkhamsted | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | Kan Kline GUIA | 9 | Team Luton | |
| 2 | 8 | Dexter CLARKE | 9 | Verulam | 1:46.50 |
| 3 | 10 | Carter HANSON | 10 | St Ives | 1:44.87 |
| 4 | 12 | Philippe MARCELO | 10 | Dunstable | 1:40.87 |
| 5 | 11 | Henry MAY | 10 | Linslade | 1:44.80 |
| 6 | 9 | Noah HOLLIS | 12 | Verulam | 1:45.78 |
| 7 | 7 | Kai BHATT | 12 | Dunstable | |
| 8 | 5 | Albie CHINNECK | 12 | Berkhamsted | |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 14 | Lok Hei (Elton) LI | 13 | Bletchley | 1:37.19 |
| 2 | 16 | Luca JONES | 10 | St Ives | 1:34.34 |
| 3 | 18 | Adam HANIF | 11 | Team Luton | 1:30.79 |
| 4 | 21 | Zachary LUDWELL | 12 | Dunstable | 1:27.45 |
| 5 | 20 | Cayden GALLOWAY | 12 | Berkhamsted | 1:29.06 |
| 6 | 17 | William HORTON | 13 | Dunstable | 1:34.01 |
| 7 | 15 | Ted REGAN | 11 | Linslade | 1:37.00 |
| 8 | 13 | Connor LINDSEY | 11 | Linslade | 1:38.75 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 23 | Ethan TREW | 10 | Dunstable | 1:25.86 |
| 2 | 25 | Elijah UNSWORTH | 10 | Team Luton | 1:24.14 |
| 3 | 27 | Jacob KENNEDY | 14 | Linslade | 1:22.01 |
| 4 | 29 | Trey BEDEAU | 12 | Bletchley | 1:21.35 |
| 5 | 28 | Tyler LAVENDER | 12 | Team Luton | 1:21.70 |
| 6 | 26 | Benji PERRY | 11 | Dunstable | 1:23.95 |
| 7 | 24 | Evan CLARKE | 11 | Verulam | 1:25.21 |
| 8 | 22 | Sebastian TERNOUTH | 10 | Verulam | 1:26.10 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 30 | Myles BURRIDGE | 11 | St Ives | 1:19.60 |
| 2 | 33 | Soufian ABDELRAZEK | 12 | St Ives | 1:18.07 |
| 3 | 36 | Tymoteusz SIKORSKI | 13 | Team Luton | 1:15.61 |
| 4 | 39 | Finley TERRY | 13 | St Ives | 1:14.58 |
| 5 | 38 | Kevin IRIMIA | 12 | Bletchley | 1:14.80 |
| 6 | 34 | Kaleb NELDER | 14 | West Suffolk | 1:16.87 |
| 7 | 31 | Thomas EVANS | 11 | Verulam | 1:18.77 |
| 8 | 71 | Elijah POWELL | 12 | Linslade | 1:20.50 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 41 | Sebastian WICKES | 12 | West Suffolk | 1:14.44 |
| 2 | 43 | Joshua BEARD | 12 | Verulam | 1:14.11 |
| 3 | 45 | T CAMILOTTI-TITON | 11 | Hatfield | 1:12.23 |
| 4 | 48 | Tate TAYLOR | 13 | St Ives | 1:11.79 |
| 5 | 47 | Cameron THACKRAH | 12 | Linslade | 1:11.96 |
| 6 | 44 | Jack MAY | 13 | Linslade | 1:14.00 |
| 7 | 42 | Wai Chun LAU | 12 | Verulam | 1:14.43 |
| 8 | 40 | Yves ROYALL | 15 | Team Luton | 1:14.49 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 51 | Luke GRIFFIN | 14 | Linslade | 1:05.98 |
| 2 | 53 | Samuel CHILDS | 12 | Berkhamsted | 1:05.30 |
| 3 | 55 | Alexander HOWARD | 16 | Berkhamsted | 1:04.28 |
| 4 | 57 | Harry VIDAL-GREENWOOD | 13 | West Suffolk | 1:03.84 |
| 5 | 56 | Henry CRIDLAND | 17 | St Ives | 1:04.21 |
| 6 | 54 | Felix GUY-PINKNEY | 14 | St Ives | 1:05.00 |
| 7 | 52 | Charles HALLAM | 12 | Harpenden | 1:05.31 |
| 8 | 49 | Marcus XU | 13 | Linslade | 1:09.20 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 59 | Matthew HORTON | 16 | Dunstable | 1:02.70 |
| 2 | 63 | Ewan GOTHARD | 16 | Linslade | 1:01.66 |
| 3 | 66 | Rafe LAWSON | 13 | Berkhamsted | 59.90 |
| 4 | 69 | Niccolo CAMILOTTI | 15 | Hatfield | 56.90 |
| 5 | 67 | George EVERETT | 16 | West Suffolk | 58.95 |
| 6 | 64 | Sam SMITH | 16 | Linslade | 1:01.24 |
| 7 | 61 | Hanz Dylan MARCELO | 14 | Dunstable | 1:02.43 |
| 8 | 58 | Jack CANHAM | 14 | Team Luton | 1:02.96 |