Whats your picantos mpg ?

Jools TBH i think you are being a bit to extreme in your persuite of the golden MPH. All i go on is how much fuel i put in to go to work. Five days a week at 40 mile a day round trip, costs me £20 (half a tank). Compared to my £45 to £50 a week in my Sadona. So when i see my fuel costs are less than half, that will do me, regardless of MPG. 

A quick update. I have the 1.0 three-door, and for this tankfull I have tried to achieve the best fuel economy I can. I have been concentrating hard on eco-driving, and the on-board mpg reading is 62.9, while my calculation from the miles travalled and litres used is 66.516 mpg. It was very difficult and boring, so I'm looking forward to havinga a bit of fun again. 

Driving was mixed town/ B roads, some night driving (lights make the economy a bit worse), some day, Bridgestone Blizzak LM20 Winter tyres (soft compound, cut treads, not as low resistance as Summer fuel saver tyres) at 37 psi, BP 95 RON, oil is Shell Helix Ultra 5W 40 fully synthetic, no passengers, no luggage.

I'm guessing the real figure for normal driving will be low to mid 50s mpg.

I'm hoping it'll get better in Spring, with warmer weather and re-fitting the standard Hankook energy saving Summer tyres.