EVENT 203 Open/Male 200m Freestyle - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Ben COUPLAND | 22 | Ealing | |
| 4 | 4 | Ethan BARRON | 10 | Flitwick | |
| 5 | 3 | Victor MAITRET | 11 | Ealing | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 6 | Harrison GORDGE | 10 | Flitwick | |
| 3 | 8 | Alexei RADCHUK | 14 | Ealing | |
| 4 | 11 | Sam COOPER | 11 | Epping For't | 3:57.59 |
| 5 | 10 | James YAN | 11 | Epping For't | 4:00.00 |
| 6 | 7 | Tymoteusz SIKORSKI | 12 | Team Luton | |
| 7 | 5 | Alidar KOZHAMZHAROV | 13 | Willesden | |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 13 | Harvey CRIGHTON | 9 | Epping For't | 3:30.00 |
| 2 | 15 | Finlay AUSTWICK | 10 | Flitwick | 3:17.24 |
| 3 | 17 | Alexandru ZAHARIA | 10 | Ealing | 3:16.39 |
| 4 | 19 | James MCKINLEY | 11 | Bo Southend | 3:12.06 |
| 5 | 18 | Tyler LAVENDER | 11 | Team Luton | 3:16.20 |
| 6 | 16 | Mark KISS | 11 | Epping For't | 3:17.08 |
| 7 | 14 | Harry SHEMMINGS | 11 | Epping For't | 3:23.52 |
| 8 | 12 | Jack MAPLE | 11 | Harpenden | 3:33.38 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 21 | Hari GILL | 10 | Ealing | 3:08.40 |
| 2 | 23 | Austin MILNER | 13 | Biggleswade | 3:06.44 |
| 3 | 25 | Kevin IRIMIA | 11 | Bletchley | 3:04.40 |
| 4 | 27 | Theo MILNER | 12 | Biggleswade | 3:03.50 |
| 5 | 26 | Harrison BRIGGS | 12 | Flitwick | 3:03.60 |
| 6 | 24 | William TURNER | 13 | Biggleswade | 3:04.46 |
| 7 | 22 | Maximilian PETRAVICH | 12 | Team Luton | 3:07.68 |
| 8 | 20 | Kai DE JUAN ENGLUND | 12 | Epping For't | 3:10.00 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 29 | Miles THOMAS | 12 | Flitwick | 3:01.19 |
| 2 | 31 | Alexander MCKAY | 11 | Epping For't | 3:00.82 |
| 3 | 33 | Oscar MCILVANEY | 11 | Flitwick | 2:59.30 |
| 4 | 35 | Yuma HAVERLY | 12 | Ealing | 2:57.10 |
| 5 | 34 | Renwa ARIA | 13 | Epping For't | 2:57.82 |
| 6 | 32 | Guillaume TITOT | 14 | Epping For't | 2:59.31 |
| 7 | 30 | Elijah POWELL | 12 | Linslade | 3:01.17 |
| 8 | 28 | Harry GILBERT | 13 | Biggleswade | 3:01.31 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 37 | Tyatt COLE | 10 | Bo Southend | 2:53.89 |
| 2 | 39 | Jack MAY | 13 | Linslade | 2:47.50 |
| 3 | 42 | Samuel FALLAHNIA | 12 | Epping For't | 2:43.41 |
| 4 | 44 | Theo MCLEAN | 13 | Flitwick | 2:36.40 |
| 5 | 43 | Theo TSANG | 12 | Ealing | 2:39.26 |
| 6 | 41 | Arthur JUVILER-BACON | 10 | Linslade | 2:43.60 |
| 7 | 38 | Arya ZOLFAGHARI | 12 | Epping For't | 2:51.92 |
| 8 | 36 | Huxley ANDREANOFF | 11 | Broomfield | 2:55.42 |
| Heat Number - 7 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 46 | Lewis COX | 13 | Ealing | 2:33.36 |
| 2 | 48 | Jack COX | 12 | Ealing | 2:31.90 |
| 3 | 50 | Karim MADANI | 13 | Ealing | 2:29.81 |
| 4 | 52 | James MOORE | 14 | Dunstable | 2:28.43 |
| 5 | 51 | Alexander BELNIKOFF | 15 | Epping For't | 2:29.23 |
| 6 | 49 | Ben GORING-FARROW | 14 | Linslade | 2:31.04 |
| 7 | 47 | Lewis HALLAM | 12 | Harpenden | 2:33.04 |
| 8 | 45 | Toby BENSON | 12 | Harpenden | 2:35.15 |
| Heat Number - 8 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 54 | Adam MESSIS | 13 | Ealing | 2:27.93 |
| 2 | 56 | Alexander THANASSOULAS | 14 | Willesden | 2:24.90 |
| 3 | 58 | Robert JAMES | 12 | Epping For't | 2:23.49 |
| 4 | 60 | Jamie WONG | 14 | Broomfield | 2:23.14 |
| 5 | 59 | Charles HALLAM | 12 | Harpenden | 2:23.35 |
| 6 | 57 | Joshua HOVELL | 13 | Ealing | 2:24.43 |
| 7 | 55 | Jack LEES | 12 | Epping For't | 2:26.00 |
| 8 | 53 | Ayden ROUMILHAC | 13 | Willesden | 2:28.20 |
| Heat Number - 9 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 62 | Alexandru APOSTOL | 16 | Epping For't | 2:22.77 |
| 2 | 65 | George WORSFOLD | 15 | Linslade | 2:22.15 |
| 3 | 68 | Adithya BANGERA | 14 | Epping For't | 2:20.03 |
| 4 | 70 | Matthew HORTON | 15 | Dunstable | 2:17.60 |
| 5 | 69 | Luke TOLAND | 13 | Flitwick | 2:18.06 |
| 6 | 67 | Jake BOWDEN | 17 | Ealing | 2:20.70 |
| 7 | 63 | Oscar RABENSTEIN TOBBA | 14 | Ealing | 2:22.58 |
| 8 | 61 | Sami BOUKHTOUCHE | 12 | Ealing | 2:23.00 |
| Heat Number - 10 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 72 | Liam BAUTISTA | 16 | Epping For't | 2:13.07 |
| 2 | 74 | Felix AMDOR | 14 | Broomfield | 2:07.98 |
| 3 | 77 | Rhys THOMAS | 16 | Linslade | 2:05.90 |
| 4 | 79 | Daniel DE FILIPPO | 16 | Flitwick | 2:01.40 |
| 5 | 78 | Reece BARCLAY | 34 | Epping For't | 2:05.20 |
| 6 | 76 | Stewart BUTLER | 14 | Dunstable | 2:06.80 |
| 7 | 73 | Kacper NOWOSIELSKI | 13 | Ealing | 2:12.50 |
| 8 | 71 | George STACEY | 16 | Bo Southend | 2:16.24 |