Its clearly stated if you increase your engine CC you have to provide details so that either you pay more tax due to emissions or for older cars (the part I'm interested in) if you go from < 1600cc to greater than. It clearly states for this that the tax is immediately due (as expected!)
What is not clear, is lets say if on a pre 2000 car reduce the engine size from say over 1600 to 1400. This would then 'qualify' for the lower VED. To be fair it ought to immediately apply but I guess they will be "grabbing" and only apply it on a fresh month (unlike the other way around!)
Has anyone had any experience with a CC change and dealing with the DVLA ? I'm really interested in this in pre 2000/2001 vehicles where its based on engine size rather than exhaust output.
