I visited the UK and the first thing I noticed when I was walking around the cities and towns as how much they stunk of diesel. Air quality made even the worst of US cities look good..
That is from old diesel cars. They are getting banned from cities.
Not sure, if anywhere other than London is moving away really. Especially considering bad public transport outside London, many people has to stick driving to city centres with cheap diesels. My manager was paying £30 road tax for his old diesel whereas my ULEZ compliant car costs above £330.