EVENT 303 Open/Male 200m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Adam HELE | 13 | Verulam | |
| 4 | 3 | Arron CHAMBERLAIN | 10 | Harpenden | |
| 5 | 2 | Jensen BESWICK | 10 | Linslade | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 4 | Aurman SINGH BRAR | 15 | Bletchley | |
| 2 | 6 | Alexander ARDEN-DAVIS | 12 | Harpenden | |
| 3 | 8 | Krishi SINGH BRAR | 11 | Bletchley | |
| 4 | 11 | Daniel CHAMBERLAIN | 13 | Harpenden | 4:24.09 |
| 5 | 10 | George HEARN | 14 | Dunstable | |
| 6 | 7 | Luke HANCOCK | 10 | Team Luton | |
| 7 | 5 | Andrei GHEORGHE | 12 | Newport Pag | |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 13 | HUXLEY ANDREANOFF | 10 | Broomfield | 4:14.20 |
| 2 | 15 | Jack MAY | 12 | Linslade | 3:50.60 |
| 3 | 17 | Lucas BAILEY | 13 | Haringey | 3:47.40 |
| 4 | 19 | Veer TAKHER | 10 | Watford SC | 3:39.30 |
| 5 | 18 | William TURNER | 12 | Biggleswade | 3:46.90 |
| 6 | 16 | Arthur STEELEY | 12 | Newport Pag | 3:49.00 |
| 7 | 14 | Cameron THACKRAH | 11 | Linslade | 3:55.40 |
| 8 | 12 | Cobi GILROY | 12 | Biggleswade | 4:17.40 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 22 | Aidan JARVIS | 11 | TigersJersey | 3:27.50 |
| 2 | 24 | Ben GORING-FARROW | 13 | Linslade | 3:24.90 |
| 3 | 26 | Dewi FORDYCE | 11 | Berkhamsted | 3:18.20 |
| 4 | 28 | Oliver MEIER | 14 | Biggleswade | 3:12.50 |
| 5 | 27 | George RHODES | 13 | Team Luton | 3:13.40 |
| 6 | 25 | Granth KARMACHARYA | 12 | Bushey | 3:22.60 |
| 7 | 23 | James MURPHY | 12 | New Hall | 3:27.10 |
| 8 | 21 | Joshen EDIS | 13 | Watford SC | 3:33.90 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 30 | Cem ADALI | 15 | Verulam | 3:02.50 |
| 2 | 32 | Anirudh PRABHU | 13 | Watford SC | 2:54.40 |
| 3 | 34 | Harrison BROOK | 15 | New Hall | 2:51.30 |
| 4 | 36 | Benjamin TAGGART | 17 | Watford SC | 2:30.40 |
| 5 | 35 | FELIX AMDOR | 13 | Broomfield | 2:47.50 |
| 6 | 33 | Gabriel TAGGART | 14 | Watford SC | 2:51.90 |
| 7 | 31 | Ethan CHAMBERLAIN | 15 | Harpenden | 2:59.90 |
| 8 | 29 | Joseph BREWSTER | 14 | Watford SC | 3:08.90 |