Well, due to being a little hungover yesterday, I did a 100mile A-Road/B-Road trip down to near salisbury (to go and pick up some new wheels) and managed to get 38MPG!

..... But is was a very uninteresting 100miles. Hardly went over 2500-3000RPM.
So it's
possible to get fairly decent consumption... But requires a hangover/lots of patience

Can't see me keeping that up for the whole tank. If I did I could probably get 350 or so miles I reckon (only used fractionally over a quarter of a tank for 103 miles)...