Mazda Bongo Camper - Need to know how much Road Tax it would cost?

WIth the new Road Tax ratings for 2009/2010 I need to find out how much it would cost to Tax a Mazda Bongo 2.5 Litre Diesel that is 11 years old.

Anyone got any idea how much it would cost to tax now and then again when the new rates kick in in 2009?

Thanks