I have the same car - a 52 plate.
My consumption is similar to yours, but using my Ultraguage I am doing things that I would'nt have thought of before. Like driving at 40 in 5th gear and seeing an indicated 110 mpg !!
My tyres are Michelin Energy Savers at 40 PSAI, and I have an almost full grill-block - just the very lowest slot in the bumper is open. This halved the warm-up time in the cold weather. I do hope to try adding an air dam and rear wheel skirts, but there is no doubt at all that it is driving-style that makes the biggest difference!!
I am a driving instructor, so by hypermiling between lessons I can still get something like 50mpg (imp) from tank to tank!
Cheers from Cambridge
