In season 2025/2026 the CYAA held the first bone fide National Championships for Castle Yachts. To acknowledge the Castle 650 National Champion, a trophy previously in the custodianship of the CYOAV was restored and repurposed as a perpetual trophy to recognise this achievement.
The tables below serve as a digital representation of the winners of the Castle 650 National Champion Trophy:
| Season | Skipper | Boat Name | Boat # | Crew |
| 2025-2026 | Mitch Bayliss | Pipalini | 147 | Tom Renshaw, Andrew Somerville |