Man of Honour
I was using 55mpg, which is attainable in a comparable car.
Yes they do, often, because they ignore purchase cost and most of the running costs and taxation in order to compare only electricty with petrol + tax + tax as if it was the whole story.
Which is why I've said before that at the present time an EV is an expensive politicial statement.
Feel free to make a comparison you think is better.
You're arguing that the government will voluntarily lose a vast amount of tax revenue. I'd need a lot more than your statement to find that argument compelling.
Personally, I think they'll find some other way of implementing the tax. Maybe vehicle tracking and tax per mile driven.
If you can support the argument that the UK will stop going to war if enough people use EVs. It's worth bearing in mind that oil is used for many other things as well. Also, switching to EVs will require a huge increase in battery production, so we may just see a switch from oil to lithium. Lots of lithium in Afghanistan, apparently.
It would be impressive if they had managed such a massive reduction in cost, but nobody else is citing that level of cost per KWh except in the context of "we hope prices will go down as far as $300/KWh by 2020" and the last claim I saw was £291 per KWh (the £7000 you claimed for a 24KWh battery). The lowest price I've seen claimed is $9000, i.e. $375 per KWh.
