I've been struggling to get over 50mpg
Calculated MPG over last 4.5k miles has been 48-49.
Last tank was on eco mode and careful not to accelerate quickly, motorway commute was 70-75 mph and still only 49mpg.
It's about the only thing I've felt dissappointed with in my Leon.
The very cold weather hasn't help lately. I've done just over 100 miles since refueling my FR 150 and I average 42 mpg. I've done a fair proportion of town too, for example today I went to the gym and I've done 2 miles with no traffic at -3 degrees, left the car in the car park for two hours and then I've done another 2 miles, this time with traffic at -1 degree...
I'm no expert but you need to wait for the Spring and Summer to get better fuel consumption.