I dropped my girlfriend at T1 LHR this morning - this was a 90% motorway and dual carriageway drive (but with some stationary traffic on the M25 - naturally
). I was in no hurry to get into the office, as I was early, so I stayed at around 60MPH to 70MPH. When I got to work, I checked the Journey Information and got average 56.3 MPG
The car was stood for 5 minutes initially, to warm up and clear some thin frosting on the windscreen. First 10 minutes of journey were in Sport mode, the rest in Normal.