Many thanks.
So a special tariff for EVs via a smart meter. East Midlands 5p/kWh ish. Almost a third the rate of what it's costing to run our washing machine/heat our hot water overnight - we are totally electric here as there is no gas at all to the village!
This is the G&D or I'd be using numerous expletives. I think I'll be having a chat with bulb (not that it'll change anything, but a good rant will make me feel better).