Also proposed to apply to pre 2006 petrol cars... on the face of it not a bad idea, as the only way around it is to drive either a newer petrol car, or a Euro6 compliant diesel...
.. or not to try and drive into that particular hole in the first place.

Doubtless the black cab drivers will be jumping up and down, but hey ho 
I think they enjoy it. They seem to do it a lot these days. Gor blimey!

The thing is that diesel is always going to be a dirtier fuel than petrol, LPG, etc. because it's a heavy oil. The motor industry has sunk loads of research into common rail diseasels, DPFs, etc. and have come up with something that's now at least acceptable to drive but not as clean as a petrol car nor as reliable, especially in urban driving such as is carried out in London.
Had they put that money into cleaner petrol engines, or LPG, or something entirely different, we'd be in a much better place but no doubt the political lobbying and brown paper envelopes came from the diseasel camp so we are where we are.
Now the brown paper envelope supply has clearly dried up so the politicos are looking for a new swindle.
