I may have got someone who was not fully up to speed on EV charging etc. Thinking about it, I may have called them before my charger was installed! I will try again next week. I have solar panels so it may be better for me to charge around mid day so that I make maximum use of the electricity I generate and as I only had my charger installed a couple of weeks ago I can monitor how often I need to charge and how many KWh's I am using. Neither of us commute so we may be better off with the lower day time rate. We shall see, I can use the spreadsheet to see what it is costing me and compare it with what it would have cost using the night time rate etc. They reckon it will increase again in September so I doubt there will be any good deals until then if any happen at all.