Having recently purchased a rather sad but rare Astra van, I contacted Alastair in the hope he could provided me with some background history.  As luck would have it, the Astra has been on the Register for a number of years and he was able to provide me with lot of data that I would never have known about.  Most importantly he was able to give me the chassis number which I could not locate on the rather corroded chassis.  Just one of the benefits of a previous owner adding the vehicle to the Register.  Sincere thanks  Alastair.