This was over 70 miles and took a lot of care to maintain but it did steady out at 44 for ages with the occasional drop to 43.8.
This car has got more economical over the years, I reckon it's loosened up a tad and the very expensive oil it uses must help I think.
I was following the C4 on this journey but forgot to check what that achieved; I have checked it before though on the same run and it did 51mpg - not that far away from the Volvo eh?
The return journey on my own tonight was a different story though
showing 38 mpg now.