Matt, since the update, mine regularly shows 220 miles full which is fairly accurate. However I have seen some impressive figures on the motorway in warm weather. I regularly do a 400 mile round trip to the London area. With the cruise set at 70MPH, I have regularly achieved 3.6miles/kwh. On one 80 mile stint between service I saw an impressive 3.8miles/kwh with a temp of 24deg c , probably never to be repeated. The last trip I did was 3.2 miles/kwh which I again think is good at motorway speed. Have to say though that range is now dropping rapidly with the colder weather. I am doing the same trip next week so it will be interesting to see what I get.
I do though drive steadily/economically as I can befitting the old git status I have so that probably helps.
Overall though I am pleased with the car since the update.