I typically get 30-35 mpg with careful driving around town (usually in eco mode) - and that’s in London with very stop start and slow traffic.
On a motorway run with cruise control on 70-75mph and in normal mode I’ll get 45-50mpg typically.
Was hoping to get closer to the claimed 57.6mpg on runs but I guess this was before they introduced the WLTP following dieselgate
Long term after ~15,000 miles my calculated average is 41.5mpg.
Overall I find this engine a decent blend of performance when you want it and efficiency!