Astra Grand-Slam (500cc Solos)
Solos | RH Sidecars | Others |
| First | Second | Third | |
| 1975 | Graham Hurry | ||
| 1976 | Barry Hazelton | ||
| 1977 | Graham Hurry | ||
| 1978 | |||
| 1979 | |||
| 1980 | |||
| 1981 | Gary Hickmott | ||
| 1999 | Paul Hurry | Joe Screen | Trevor Banks |
| 2000 | Cancelled | ||
| 2001 | Cancelled | ||
| 2002 | Kelvin Tatum | Joe Screen | Jeremy Doncaster |
| 2003 | Paul Hurry | Kelvin Tatum | Joe Screen |
| 2004 | Paul Hurry | Kelvin Tatum | Sebastien Tresarrieu (Fra) |
| 2005 | Paul Hurry | Daniel Rath (Ger) | Mitch Godden |
