HI buddy. Basically from July new cars will not have their C02/MPG etc measured the old NEDC way.
The new system is meant to replicate "real world" driving as opposed to in a laboratory.
Net result is that all the car makers are having to modify their model range to incorporate new technology.
For instance one of the changes is that the car will no longer have a reset button on its average MPG... so that perspective new owners
can see how the car has really performed over its life.
In addition the engines and exhausts are having to be "modified" shall we say.
Net result is that we no longer have the manual gearbox on our beloved M140 and M240 and the current C02 will go up one band
so first year road tax from July on all M140 and M240 will probably be £830 rather than the current £515. This is speculative at present
but I have to incorporate it as its easier to give good news later on rather than bad news!