If I drove a diesel and lived in or near London or at least visited now and again, I would consider it. It is obviously unfair, taxes always are really. But if the problem only occurs in small pockets, like cities such as London, not sure what else they can do. Interesting debate:
"All drivers want emissions to be reduced, but to make diesel cars who are responsible for just 11% of London’s NOx emissions pay 100% of the penalties is pathologically immoral and purely a knee jerk cash grab. The remainder, amounting to nearly 90% is generated by buses, taxis, construction equipment, commercial boilers, ground aviation and trains to name just a few culprits, and they will pay nothing. And more importantly, London’s emissions are falling without the need for tax grabs, as cars and trucks are modernising with time."