This BBC report http://www.bbc.co.uk/news/business-42615559 manages not to mention what caused the sales of diesel cars to massively rise in the first place, just saying this:
'The worst is yet to come for diesel cars which will see their sales continue to plunge, a study has warned.
Aston University predicts they will account for just 15% of the UK market by 2025, down from a 50% peak. '
I suppose that reminding people that it was Labour policies when in power that lead to a steep rise in the number of diesel cars sold would be disloyal to their Labour Party allies. The BBC's role as the propaganda arm of the Labour Party is clear and disgusting.