Open/Male - Long Course - 100m Butterfly - Camden Swiss Cottage SC - 12 Years Age Group - At 31st December 2020
| Rank | Name | Ranked Club | YoB | Meet Name | Venue | Level | Date | Time | FINA |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Llewellyn Porter | Camden Swiss | 08 | British Summer Championships | Sheffield | 1 | 26/07/23 | 55.65 | 701 |
| 2 | Hubert Pytlowany | Ealing | 08 | Swim England National Summer Meet 2023 | Sheffield | 1 | 03/08/23 | 1:00.52 | 545 |
| 3 | Amir Jelbaoui | Camden Swiss | 08 | Newham & UEL SC National Qualifier Open Meet 2024 | Stratford | 1 | 24/03/24 | 1:01.73 | 514 |
| 4 | Sauren Singh | Camden Swiss | 08 | City of Sheffield SS Premier Open Meet 2024 | Sheffield | 1 | 10/03/24 | 1:03.02 | 483 |
| 5 | Malachy Hitchcock | Camden Swiss | 08 | Newham & UEL SC National Qualifier Open Meet 2024 | Stratford | 1 | 24/03/24 | 1:08.22 | 380 |
 |  |
