Open/Male - Long Course - 400m Individual Medley - Camden Swiss Cottage SC - 10 Years Age Group - At 31st December 2022
| Rank | Name | Ranked Club | YoB | Meet Name | Venue | Level | Date | Time | FINA |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Alex Nicorici | Camden Swiss | 12 | Winchester City Penguins Summer Scorcher 2023 | Winchester | 3 | 23/07/23 | 6:13.19 | 274 |
| 2 | Lucas Vermaat | Camden Swiss | 12 | 2024 Middlesex County Championships | Hillingdon | 1 | 04/02/24 | 6:23.58 | 252 |