I still think it would be impossible to totally eradicate the banning of traditional cars even in 2050 as it is still the main point of commerce of most part of Britain. I'm sure most fortune 500 automotive company will try to hinder this kind of law as they are still relevant in country's profit and they are developing new model of combustible cars.I believe a much cooperation with fuel powered automotive is the key and let them consider developing electric car should be an agenda first, before banning fuel cars.