EVENT 602 Open/Male 200m Backstroke - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 3 | 1 | Alidar KOZHAMZHAROV | 13 | Willesden | |
| 4 | 5 | James YAN | 11 | Epping For't | 4:00.00 |
| 5 | 2 | Christopher ROCHOWSKI | 9 | Linslade | |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 7 | Mark KISS | 11 | Epping For't | 3:33.37 |
| 3 | 9 | Jack MAPLE | 11 | Harpenden | 3:26.36 |
| 4 | 11 | Renwa ARIA | 13 | Epping For't | 3:23.98 |
| 5 | 10 | Harrison BRIGGS | 12 | Flitwick | 3:24.10 |
| 6 | 8 | Samuel MERIFIELD | 12 | Broomfield | 3:26.98 |
| 7 | 6 | Harvey CRIGHTON | 9 | Epping For't | 3:40.00 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 13 | Hugo MILLER | 10 | Ealing | 3:18.50 |
| 2 | 15 | Theo RAWNSLEY | 9 | Harpenden | 3:14.49 |
| 3 | 17 | Arthur JUVILER-BACON | 10 | Linslade | 3:02.10 |
| 4 | 19 | Luke TOLAND | 13 | Flitwick | 2:54.44 |
| 5 | 18 | Samuel FALLAHNIA | 12 | Epping For't | 2:54.96 |
| 6 | 16 | Elijah POWELL | 12 | Linslade | 3:09.91 |
| 7 | 14 | Harry GILBERT | 13 | Biggleswade | 3:16.85 |
| 8 | 12 | Oscar MCILVANEY | 11 | Flitwick | 3:18.95 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 21 | Lewis HALLAM | 12 | Harpenden | 2:51.14 |
| 2 | 23 | Charles HALLAM | 12 | Harpenden | 2:50.01 |
| 3 | 25 | Alexander BELNIKOFF | 15 | Epping For't | 2:48.77 |
| 4 | 27 | Marcus XU | 13 | Linslade | 2:46.29 |
| 5 | 26 | George DAVEY-CROUCH | 13 | Bo Southend | 2:47.77 |
| 6 | 24 | Sebastian MILLER | 13 | Ealing | 2:49.51 |
| 7 | 22 | Adam MESSIS | 13 | Ealing | 2:50.30 |
| 8 | 20 | Theo TSANG | 12 | Ealing | 2:53.74 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 30 | Alexander THANASSOULAS | 14 | Willesden | 2:43.81 |
| 2 | 33 | Ayden ROUMILHAC | 13 | Willesden | 2:41.82 |
| 3 | 35 | Robert JAMES | 12 | Epping For't | 2:41.03 |
| 4 | 38 | George WORSFOLD | 15 | Linslade | 2:30.35 |
| 5 | 36 | James MOORE | 14 | Dunstable | 2:40.10 |
| 6 | 34 | Sami BOUKHTOUCHE | 12 | Ealing | 2:41.60 |
| 7 | 32 | Sam SMITH | 15 | Linslade | 2:42.09 |
| 8 | 29 | Jack ROBERTSON | 12 | Flitwick | 2:44.22 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 40 | Philipp VITKOVSKI | 14 | Epping For't | 2:28.66 |
| 2 | 42 | Lochlan SHAW | 14 | Flitwick | 2:27.23 |
| 3 | 44 | Joseph FINNERTY | 17 | Linslade | 2:25.58 |
| 4 | 46 | Daniel DE FILIPPO | 16 | Flitwick | 2:14.24 |
| 5 | 45 | Liam BAUTISTA | 16 | Epping For't | 2:19.99 |
| 6 | 43 | James HALLAM | 14 | Harpenden | 2:27.01 |
| 7 | 41 | Joseph EMMS | 14 | Biggleswade | 2:27.70 |
| 8 | 39 | George STACEY | 16 | Bo Southend | 2:30.12 |