EVENT 206 Open/Male 100m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 2 | 1 | Sebastian LEE | 14 | Seagulls SC | 2:29.41 |
| 3 | 3 | Finlay BOOTH | 14 | S Bournem'th | 2:06.02 |
| 4 | 2 | Micah LIVELY | 14 | Weymouth | 2:06.59 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 5 | Kevin MCGRATH | 13 | Poole | 1:53.87 |
| 2 | 7 | Luan ISUFI | 15 | Poole | 1:52.35 |
| 3 | 9 | Noah COOPER | 14 | N Dorset SC | 1:50.09 |
| 4 | 8 | Franco HOWLETT | 15 | West Dorset | 1:50.85 |
| 5 | 6 | Edward KEEN | 13 | Bridport Bar | 1:52.35 |
| 6 | 4 | Daniel BEATON | 14 | Seagulls SC | 1:58.45 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 11 | Harry MORGAN | 13 | S Bournem'th | 1:46.93 |
| 2 | 13 | Stanley WEIGHELL | 15 | Seagulls SC | 1:43.43 |
| 3 | 15 | Sebastian CHAPMAN | 11 | Blandford | 1:41.87 |
| 4 | 14 | George ALLEN | 11 | Wareham | 1:43.30 |
| 5 | 12 | Joseph RUDD | 13 | Weymouth | 1:44.33 |
| 6 | 10 | Ralph VEARNCOMBE | 14 | Poole | 1:47.00 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 17 | A MCINTYRE BONDAROFF | 09 | Blandford | 1:38.27 |
| 2 | 19 | Reece EMERY | 12 | Blandford | 1:33.06 |
| 3 | 21 | Zachary FLINT | 11 | Seagulls SC | 1:30.69 |
| 4 | 20 | Harry HENSHAW | 12 | West Dorset | 1:32.26 |
| 5 | 18 | Nikita KALININ | 10 | Wareham | 1:33.34 |
| 6 | 16 | Tyler DOUGLAS | 11 | Blandford | 1:41.28 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | YoB | Club | Time |
| 1 | 23 | Joseph SUTTON | 11 | Wareham | 1:27.48 |
| 2 | 25 | Billy LEWIS | 10 | S Bournem'th | 1:25.45 |
| 3 | 27 | Geoffrey GOODRICK | 09 | Weymouth | 1:22.85 |
| 4 | 26 | Liam DETRICK | 10 | S Bournem'th | 1:24.15 |
| 5 | 24 | Miron WOZNIAK | 09 | Blandford | 1:26.63 |
| 6 | 22 | Freddie BROKENSHIRE | 11 | Weymouth | 1:28.07 |