Just one thing to remember everyone, power costs are quite different around the world. The UK (and all of Europe for that matter) are known to have quite expensive petrol/diesel.
But check out the details on this video. Electricity in a rubbish Leaf can be more expensive than a normal small Mercedes.
I personally believe though that if you are able to afford a new EV that buying a Civic/Camry/etc that is 5 years old and just paying for petrol is a better option - cheap EVs are not a replacement for a normal car and the second hand market of normal cars provides plenty of great options