Zacly - identical average MPG and total distance as mine. I think we've been here many times before, but steep (Surrey) hills within half a mile of a cold start kills my economy. As does stop-start traffic, which I encounter most of the time. But let's not get hung up about mileage figures again, as the overall cost difference on a typical 6-8000 annual total is not exactly massive. If you do 7,000/year at the low-end a average of 43mpg, a year's worth of fuel will cost £886 (@ an average of £1.20/litre). Drive like a nun and make 48mpg (at the cost of any fun or 'progression'...) and you'll save precisely £92, that's all.
For what it's worth, on a trip to Le Mans and back this year, over about 700 miles, in 30C or more heat, with full A/C, back seats down full of camping gear, sitting at a GPS measured 130kph, I averaged only 38mpg, so maybe my car's a bit of a duffer