What's the consumption like round town in the cold weather though?
Most accurate way is a tank to tank full calculation. I find the on board computer is a few MPG optimistic.
The pre-Euro6 engines were generally better performing, MPG wise (true of 1.2 and the MultiJet diesel too). After changes in later life to perform better under WLTP tests, they all seem to be worse!
I'd like to see the average speed on that trip though. No way would you get that at 70-75 mph.
Edit....... must be 50mph according to time traveled and mileage
Same journey in my TA 4x4 you might get mid 50's. I'd get 40 my driving style if I'm lucky. 5 miles home from my favoured petrol station, reads average at start of around 12-19mpg. Can improve this to about 39 but hard work. So welly it instead.