Roger I am so pleased for you, like you I now am in same boat, I am in a better position than other we have our own bungalow with a drive. I would imagine Tesco will eventually start giving you a card with electric credit card updated when you shop.
As regard government revenue, I would imagine a pay as go, however you never no, the disabled right campaigners may fight our corner and getting us an exemption from the charge, are disable people exempt from the congestion charges?
Unfortunately I have suffered a brain injury and occasionally I get confused and often say the wrong thing.