Thanks @Oscarmax Would you mind explaining (for my simple brain) how you feed the cost of charging into your stated mpg figures? Presumably the mpg figures on the instrument cluster are for the petrol consumption only over the mileage driven? The cost of charging the car is going to be a £ / miles per kWh figure, so how do you marry those two very different things together in order to calculate an ICE equivalent mpg figure that includes the cost of charging?