Choosing the best green supermini of 2012 wasn't easy. This category contains some of the most environmentally friendly cars on sale, but our winner needs to be good at pretty much everything.

With less bulk to carry around, superminis have a head start over larger cars in keeping fuel consumption and CO2 emissions to a minimum, but the competition between them is tough. Low running costs are essential for the best green superminis, but our winner should also be easy to drive, solidly built and provide a bit of fun.