I think diesels are shifting back to commercial vehicle buyers and high mileage drivers. I do not think the latest Euro6 diesels will be banned anytime soon.

Diesel engines have never been much good for short journeys, with short-run fuel economy being very poor due to the time and mileage it takes for a typical four-cylinder turbodiesel to reach its optimum operating temperature. That's why EGRs, turbos and DPFs get gummed up by people who use them for four or five-mile journeys every day.

A petrol or electric car is much more suitable for large cities and towns. They are much nicer to drive at lower speeds, too.