Looks like a nice car Damien, I'll be back in Essex (Westcliff-on-sea) when I get back to the UK in 1 week 3 days 3 hours and 24 mins - not counting really.
Mileage, about 250 to the tank, got 160 once but mostly slow trips to work down the A127 so not ideal. Average was 19mpg over a year. My justification is that there is little depreciation. If you bought a new car you'd be loosing 000's per year, more then we spend on fuel.
I know what you mean about these cars, you're lucky you can get one so young, I had to wait until I was 28 until I got mine. Love it though, I wonder if I'll ever not own one.