I wish we could but your sales figures are completely wrong for the Astra, thats coming from a VX insider. You're correct that Star Silver was the most sold colour, most of them got sold to hire companies from new, like enterprise, hertz etc, we knew this because the log books always told us, we used to buy them back at 14,000 miles at the most then resell them at our group of dealerships. Yet 1,000's per annum were leased/sold privately each year too.
On the whole, your post is irrelevant really because it just doesn't apply as car has been seized by the police anyway.
5th gen had a facelift in 2006 don't forget which changed certain features going forward. I can break every one of these features down if need be but it is just pointless. On Astras, wheels are the big give away along with a badge just on the wing of the car behind the front wheel to differenciate models along with interior trims.
The models they did then were the Life, Club, SXi, SRi, Elite and the VXR.
VXR was only a 3 door HP model.
Life, Club, SXi, SRi and Elite were both 5 door hatchback and estates.
SXi and SRi were also 3 door too as well as estates.