I don't know the answer, but if this in relation to the budget, this may be useful for people:
Sorry to hijack!
a new higher band of graduated VED (band G), set at £210 for petrol cars, will be introduced for the most polluting new cars (those above 225g of carbon
dioxide emissions per kilometre);
the VED rate for the small number of cars with the very lowest carbon
emissions (band A) will be reduced to £0 to encourage take-up and assist the development of the low carbon car market;
VED rates will also be reduced for band B by £35 and C by £5, frozen for bands D and E, and increased by £25 for band F;
rates for pre-2001 registered cars and light goods vehicles in the lower band will be frozen with the higher band increased by £5;