So its now on the inside wall, due to the previous owner being a tight arse when they had an extention!!
Is your electrics near an outside wall or as I suspect in what was an old pantry now in the middle of the house?
Either way they are extremely unlikely to want to dig up the floor, as it causes all sorts of problems with regs if its not deep enouth. It will be suface mounted or in trunking if they cable in twin and earth to an outside point, you can box it in afterwards to make it look pretty 🙂
Prior to having a charger fitted you will have to send photo’s off anyway and fll in a form.
Can you put a ppicture up of your electrics and where they are in relation to an external wall or if the extension is ground floor floor garage with bedroom above or all living quarters!
I don’t have an EV but charger and installation is free with mb up to a certain point. Perhaps others can say if they purchase their own cable due to the run was the work then carried out for free. I think @Fastbike1000 quoted he paid £250ish extra for 30 meter cable run.