Natalie Bennett told Britain to vote Remain to save the planet this morning. Standing in front of a 12.4 tonne BSE battle bus…

Guido’s data bods have been crunching the numbers. A very conservative estimate tracks the bus as having covered some 900 miles since April. With the six-cylinder Mercedes-Benz Tourino boasting just 14.1 miles per gallon, it has used at least 63.8 gallons of fuel – 290 litres – on its journey round the country. That’s roughly equivalent to two entire barrels of oil, or a carbon footprint of one tonne of carbon dioxide. Sure Nat’s bike saved a few litres, though…