Well, that first item is hardly new news, it's an article from 3 months ago, 2 Nov 2016. And it is in the Guardian the tree hugger's handbook.
With the exception of the first BBC article, the others are from last year too.
It is strange though how everytime the problem of vehicle exhaust fumes arises, there's always a picture of an old rusty car exhaust tailpipe.
Diesel fumes in the cities might well be problem, I won't argue with that, but so are petrol exhaust fumes. The major causes of these problems are unlikely to be "light" vehicles only but some of the larger vehicle engines such as buses, lorries, bin lorries, fire appliances and so on.
When was the last time the writer stood on a platform in Paddington Station? And what about diesel powered vessels on the river?
What has brought this to the fore now is the almost permanents high pressure weather conditions over the country giving rise to very light winds and early winter fog trapping the pollution, which I agree isn't much fun if you're in it.
As to a ban on diesel engines, well that just ain't gonna happen in my lifetime or probably even yours.
I don't see how that can be to do with vehicle fumes, a parked car doesn't emit any.