As stated, I do around 45 miles every day - approx 22 to work, and then back again.
I leave home, and have 4 roundabouts to negotiate before I hit the motorway - around 5 miles or so.
I then do around 10 miles on the motorway. For 2-3 miles it can be stop start, or around 30mph at times. Otherwise its at 80mph.
then straight onto an A road for around 5 miles.
Its then another large roundabout before the final few miles, on another A road.
Usually travel at around 50-60mph on the A roads.
I have an ED30 and have had up to 38mpg from a single journey on several occasions.
Most of the time, on normal work days, I can average 35-36mpg - again at around 70-80mph, hence its very possible.
In fact, I aim for around 35mpg during work days, as then I usually have enough left in the tank for a blast at the weekends if I get the time.
I dont drive to/from work with a heavy foot, since I have steady moving traffic in my direction. The secret is to not put your foot down when accelerating, and to keep your speed constant, rather then speeding up to someones ass, then slowing, then speeding up again as the person moves etc. Stay constant along with the flow of traffic and you achieve a much better mpg return.
I learnt to do this after the amount of stone chips I was picking up from others when I drove too close behind them!! lol. Now I just stay back a little and they move out of the way as they see the car anyways.
On my drive home one day, I checked my computer, and it showed an average of 40mpg!
Although by the time I got home it had dropped to 37mpg.
I think this is the very best you can get out of a ED30/Pirelli - I'd be suprised if anyone got any more.
I have a long 300 mile jouney coming up in July - and I wont be driving with a heavy foot as my kids will be with me - hence Im expected 37mpg at the very least. I expect to do the 300 miles within 4 hours.....

My car has covered just under 6k miles to date - some state the mpg is supposed to get better with age! Not sure how much better it can get TBH!!!