EVENT 303 Open/Male 200m Breaststroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 2 | William HORTON | 13 | Dunstable | |
| 4 | 4 | Logan HESKETT | 9 | Dunstable | |
| 5 | 3 | Alexander SIMON | 11 | Ealing | |
| 6 | 1 | Kasper GINGELL | 10 | TigersJersey | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | Ethan TREW | 11 | Dunstable | |
| 2 | 8 | Arron CHAMBERLAIN | 12 | Harpenden | |
| 3 | 12 | Fraser COLLINS | 12 | TigersJersey | 4:02.86 |
| 4 | 14 | Luke HANCOCK | 12 | Team Luton | 3:49.96 |
| 5 | 13 | Lucas MARTINEK | 10 | Co Milton K | 3:50.71 |
| 6 | 10 | Leo CURTIS | 10 | Bo Southend | 4:20.00 |
| 7 | 7 | Harry REGAN | 12 | Wycombe Dist | |
| 8 | 5 | Lorenzo BRIDGER | 14 | Harpenden | |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 16 | Oscar REDFERN | 11 | Wycombe Dist | 3:41.47 |
| 2 | 18 | Mark GREEN | 12 | Wycombe Dist | 3:32.10 |
| 3 | 20 | Frank CHOJNACKI | 10 | Ealing | 3:29.20 |
| 4 | 22 | Nicholas RADU | 11 | Co Milton K | 3:27.18 |
| 5 | 21 | Kevin IRIMIA | 12 | Bletchley | 3:28.09 |
| 6 | 19 | Alexandru ZAHARIA | 11 | Ealing | 3:30.37 |
| 7 | 17 | Chester CURTIS | 12 | Bo Southend | 3:37.90 |
| 8 | 15 | Louis WILLIAMS | 11 | TigersJersey | 3:47.84 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 24 | Zhirui CHEN | 12 | Ealing | 3:26.20 |
| 2 | 26 | Cobi GILROY | 14 | Biggleswade | 3:22.55 |
| 3 | 28 | Elijah UNSWORTH | 10 | Team Luton | 3:20.80 |
| 4 | 31 | Sebastian MILLER | 14 | Ealing | 3:17.53 |
| 5 | 30 | Oliver ELO | 13 | Saffron Wald | 3:19.86 |
| 6 | 27 | Jacob CLARKE | 12 | Wycombe Dist | 3:21.92 |
| 7 | 25 | Matteo BALTAZAR | 12 | Wycombe Dist | 3:24.27 |
| 8 | 23 | Bertrand HARRISON | 10 | Wycombe Dist | 3:26.79 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 33 | Luke WILLIAMS | 13 | Harpenden | 3:13.66 |
| 2 | 35 | Jack PORCH | 13 | Saffron Wald | 3:12.10 |
| 3 | 37 | Theo WEDD | 13 | Wycombe Dist | 3:06.16 |
| 4 | 39 | Kit MANSFIELD | 13 | TigersJersey | 3:02.30 |
| 5 | 38 | Harry GILBERT | 14 | Biggleswade | 3:04.60 |
| 6 | 36 | Matthew HORTON | 16 | Dunstable | 3:10.48 |
| 7 | 34 | Trey BEDEAU | 13 | Bletchley | 3:12.47 |
| 8 | 32 | Benji PERRY | 12 | Dunstable | 3:14.80 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 41 | Henry CHALONER | 14 | Biggleswade | 2:59.52 |
| 2 | 43 | Lewis COX | 14 | Ealing | 2:50.90 |
| 3 | 45 | Henry TAYLOR | 15 | Biggleswade | 2:48.27 |
| 4 | 47 | Rafe LAWSON | 14 | Berkhamsted | 2:37.76 |
| 5 | 46 | Dewi FORDYCE | 13 | Berkhamsted | 2:44.30 |
| 6 | 44 | Hanz Dylan MARCELO | 15 | Dunstable | 2:49.77 |
| 7 | 42 | Maxim COLLINSON | 13 | Verulam | 2:53.30 |
| 8 | 40 | Maximilian PETRAVICH | 13 | Team Luton | 3:00.20 |