Essentially there are 3 categories the car falls under...
1) Registered as PLG, no emission levels recorded on Registration Certificate = cheapest TAX currently £185 (12 months) rising to £190 in March 2009.
2) Registered using later model report stating CO2 emissions of 223g/km = currently Band F £210 (12 months), changing to Band K and rising on the 13th March 2009 to £215, then to £245 in March 2010.
3) Registered using early model report stating CO2 emissions of 234g/km = currently Band G £400 (12 months), changing to Band L and rising on the 13th March 2009 to £415, then to £425 in March 2010.
There is an exception for cars first registered between 1 March 2001 and 23 March 2006, will fall into band K even if they emit more than 225g/km... although I do not fully understand this exception... but will try and study up and update this post.
EDIT:
According to the AA "cars emitting over 225g/km and first registered between 1 March 2001 and 23 March 2006 will now go into band 'K', at least until 2010/11. Under the previous proposals these cars would have moved into band 'L' or 'M' depending on official CO2 emissions. So in theory come March, people currently paying £400 for TAX, could be paying £215, provided their car was registered between the stated dates... :shock: Surely not... :idea: