Thanks MFillingham.
Good to know about Cornwall services – I have often stopped there for comfort break and top up with fuel, before last short stretch.
As stated I don’t usually make the journey in the winter months, but if I do I’m hoping pre warming car then heated seats and steering wheel, which I understand do not use the main battery and do not therefore detract from mileage – I’m working on 240 miles and a charge around Exeter – but Cornwall services – better still.
Many thanks for your input ?