Is this really a vote winner? I think the Uxbridge/ULEZ thing has been massively overplayed. Labour came within 500 votes of winning the ex-Prime Minister's seat, a seat they have never won in modern times - even in the 1997 landslide.
Also, ULEZ is a concrete policy that has an immediate financial effect on the drivers of older vehicles. It probably did focus some minds.
Arguing you will not implement some vague "net-zero" policy that was years away will not have the same effect. Also, people can see the climate is changing and most probably do think "something needs to be done" - even those opposed to individual measures probably do worry about where things are heading.
It also puts the Tories at odds with business. Electric cars are now clearly "the future" and I think many people accept that. The few car nuts I know all either have an electric car or are at least considering switching to one when they next get round to replacing their current car.
On a personal note. Just when you think you can't dislike/despise the Tories any more, they somehow manage to do it. I really should know better, after decades of experience. Yet they somehow never fail to disappoint.