New Diesel Emissions standards comming in from Europe in September .Wont effect us (I hope ) but as road tax is set by your emissions the government might increase road tax on smokier vehicles to force people to clean up their act .BUt it might effect us as they also set the VRT on emissions so if your importing the VRT might be increased and knowing this government they might really increase it on used cars as the amount of imports are going up while new car sales are dropping .