Government intend to stop the sale of all new petrol/diesel cars by 2040 or even 2035 with the UK being carbon neutral by 2050. This target date is totally unrealistic given the lack of funding for infrastructural needs.
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The 2040 ban will also effect the economy and could have a detrimental effect on jobs and industry.
Every part of the UK depends on diesel powered vehicles. I believe the long term result from this ban will be UK economic stagnation and collapse.
https://www.citymetric.com/transport/banning-petrol-cars-all-very-well-it-won-t-work-without-huge-investment-electric
https://www.spiked-online.com/2020/02/05/this-ban-on-petrol-and-diesel-cars-makes-no-sense/
https://beta.spectator.co.uk/article/why-grant-shapps-shouldn-t-accelerate-the-ban-on-petrol-and-diesel-cars