EVENT 401 Men Open 200m Butterfly - Heats
| Heat Number - 1 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 2 | 1 | Hayden SANDERS | 11 | Gwich Royals | 3:26.80 |
| 3 | 2 | Charlie BRAID | 11 | Gwich Royals | 3:05.71 |
| 4 | 3 | Jago DALEY-ALLISON | 12 | Beckenham | 3:05.46 |
| 5 | 4 | Alfie GOMER | 13 | Maidstone SC | 3:05.06 |
| 6 | 5 | Albert BROOKS | 13 | Bromley | 3:02.00 |
| Heat Number - 2 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 6 | Lanre DADA | 12 | Maidstone SC | 3:00.53 |
| 2 | 7 | George GOODWIN | 13 | Black Lion | 2:57.93 |
| 3 | 8 | Jeremiah CARNEGIE | 13 | Beckenham | 2:54.37 |
| 4 | 9 | Michael BANKS | 14 | Bromley | 2:53.38 |
| 5 | 10 | Xian Ming LI | 14 | Tonbridge | 2:50.91 |
| 6 | 12 | Jack WISE | 15 | Dartford | 2:38.93 |
| 7 | 13 | Vaatsalya SWARUP | 15 | Orpington OJ | 2:37.42 |
| 8 | 14 | James PAGE | 16 | Thanet Swim | 2:37.22 |
| Heat Number - 3 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 15 | Luke CLEAVER | 15 | Beckenham | 2:33.87 |
| 2 | 16 | Raef OWEN | 13 | Gwich Royals | 2:33.76 |
| 3 | 17 | Kal-El NTIAMOAH | 14 | Beckenham | 2:33.63 |
| 4 | 18 | Charley KING | 14 | Thanet Swim | 2:33.61 |
| 5 | 19 | Kevin CAO | 15 | Gwich Royals | 2:30.99 |
| 6 | 20 | Oliver WARNER | 15 | Bromley | 2:30.44 |
| 7 | 21 | Ralph SEREKI | 14 | Maidstone SC | 2:30.21 |
| 8 | 22 | Alexander DACK | 15 | Thanet Swim | 2:30.10 |
| Heat Number - 4 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 24 | Thomas GOLDUP | 15 | Dover Life | 2:28.61 |
| 2 | 26 | Tom HAWKINS | 15 | Bexley | 2:26.76 |
| 3 | 28 | Hayden ANNAN | 15 | RTW Monson | 2:25.43 |
| 4 | 31 | Bryan DINEV | 16 | Bexley | 2:23.24 |
| 5 | 30 | Edward DILL-RUSSELL | 18 | Dover Life | 2:23.80 |
| 6 | 27 | Jarred ADAMS | 16 | Gravesend | 2:26.48 |
| 7 | 25 | Sebastian WILLIAMS | 15 | Beckenham | 2:26.82 |
| 8 | 23 | Finley GILHAM | 15 | Bexley | 2:28.90 |
| Heat Number - 5 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 35 | Sam MARTIN-YOUNG | 16 | Sevenoaks | 2:21.85 |
| 2 | 37 | Noah OLADELE-AJOSE | 16 | Bromley | 2:19.85 |
| 3 | 39 | Emilio KNOCK | 17 | Sevenoaks | 2:17.14 |
| 4 | 41 | Liam HAMP | 16 | Thanet Swim | 2:16.14 |
| 5 | 40 | Alexander CORVER | 16 | Bromley | 2:16.55 |
| 6 | 38 | Max EL-MOKADEM | 14 | RTW Monson | 2:19.14 |
| 7 | 36 | George WISE | 19 | Dartford | 2:19.95 |
| 8 | 32 | Henry NORMAN | 15 | Bromley | 2:23.09 |
| Heat Number - 6 |
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 43 | Samuel LANDER | 16 | Bromley | 2:14.06 |
| 2 | 45 | Luca MCAVOY | 18 | Thanet Swim | 2:11.00 |
| 3 | 47 | Harvey MAUNDERS | 18 | Gwich Royals | 2:10.19 |
| 4 | 49 | James CLEAVER | 17 | Beckenham | 2:02.87 |
| 5 | 48 | Albert BRANCH | 17 | Sevenoaks | 2:04.71 |
| 6 | 46 | Samuel RYAN | 16 | Orpington OJ | 2:10.59 |
| 7 | 44 | David ALLEN | 17 | Sevenoaks | 2:12.77 |
| 8 | 42 | Aran BISSETT | 14 | RTW Monson | 2:14.91 |