Visited my brother over weekend and thouht I’d fill up rather than waiting till I got home. Car was charged before collecting daughter from school, so left with 5 miles less than full charge but, will base calculation as if full battery for ease.
174 miles driven at cost of £19.80 (£1.359) + £2.70 charge = £22.50
16.55l /4.546 = 3.64 gallons
174 / 3.64 = 47.8mpg