Dont do as I did yesterday. I arrived home with about 20 miles range left. I plugged in and when we went to go out nearly two hours later I was shocked to find only 4 miles range when I had hoped to see it fully charged. I had forgotten to switch off ! In mitigation I things are hectic at the moment with building work going on here with the charge point moved to a temporary spot and daily visits to visits to hospital and that is not allowing for it being Christmas. One bonus is that the car was nice and warm.