Just taxed mine for £210, it has 221g/km emissions
I only ever get around 20 mpg out of mine but I do drive it quite hard.
Fine it has got the right engine, but its an SE with no nav, xenons or bluetooth.
A 56 reg one (assuming it's that Car Giant link) is £400 tax as those are 228 g/km CO2.
As for MPG, I've had 35 mpg cruising at motorway speeds but you'd be pushed to get anything more than that.
Around town 22-25 mpg is par for the course.