Bought a 08 plate defender 110 station wagon last year and have just renewed tax disc. horrified to see it was £490 as a diesel car. Spoke to DVLA and they say I cannot change tax class from diesel car (as first registered) to commercial (i.e. to save about £270!). I am a landscape gardener / tree surgeon so my Land rover is commercial - it is all livered up and contains my small tools. Anyone had this issue before and been able to successfully change or am I faced with the grim fact that our lovely business friendly government are going to screw me more?! thanks