I’ve now been down to 3%. Not something i’d recommend!
When I left London with 47% to cover 47miles I thought I was quite safe but did turn off the heater just in case.
Conditions were dark, very wet and just above freezing
I suspect the head wind most of the way was a major factor in the poor mileage.
From 31 miles available the readings were unreliable, often dropping several % in one go. At 16miles from home I had 26 miles available but 5 miles later that had dropped to 17 available (I was driving like an old person on their way to church).
Worth noting, at 3% the miles available is replaced with —-
I guess the message is to watch out for wind direction it can mess up your expected range