Thanks for finding some stats. Based on the cars I see driving in the UK, I'm sure plenty of people buy cars that claim to do 55mpg, and many of those cars will

Thanks for finding some stats. Based on the cars I see driving in the UK, I'm sure plenty of people buy cars that claim to do 55mpg, and many of those cars will actually do 55mpg. But as an average? - I'm just a bit unconvinced. (Perhaps the mpgs were added up and divided by N? That doesn't always provide the answer you're looking for.)