Open/Male - Short Course - 400m Individual Medley - Camden Swiss Cottage SC - 13 Years Age Group - At 31st December 2021
| Rank | Name | Ranked Club | YoB | Meet Name | Venue | Level | Date | Time | FINA |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Llewellyn Porter | Camden Swiss | 08 | Swim England Winter Championships 2023 | Sheffield | 2 | 15/12/23 | 4:18.39 | 750 |
| 2 | Cillian Bramham | Camden Swiss | 08 | Camden Swiss Cottage SC Club Championships 2023 | Swiss Cottage LC | 4 | 09/06/23 | 4:55.43 | 502 |
| 3 | Malachy Hitchcock | Camden Swiss | 08 | Winchester City Penguins Winter Autumn Qualifier | Winchester | 2 | 08/10/23 | 5:23.88 | 381 |
| 4 | Leonard Stocker | Camden Swiss | 08 | Hillingdon Swimming Club Winter Open Meet 2023 | Hillingdon | 3 | 17/12/23 | 5:46.14 | 312 |