If you want to get a good response when you are on the phone to an electrician, mention the smell of burning. It wasn’t very pronounced, but it was definitely there….
It all started when the charge for the car failed half way through. The earth drip on the charge box had triggered. I reset it and tried again. And that’s when it tripped again and I smelled the fateful smell.
I think this is a known fault with the charge box that I bought. Anyhoo, they are coming in a week or so to replace the faulty unit. And I’ve turned everything off.