Registrations of battery electric (BEV), plug-in hybrid (PHEV) and hybrid vehicles have never been stronger, with sales boosted by tax advantages, government incentives and the looming ban on the sale of new petrol and diesel cars. In short, sales of conventional cars are on the slide, as Britain’s motorists turn green.

The promise of lower running costs is one thing, but electrified cars tend to be more expensive than their petrol and diesel equivalents. Which is why we’ve trawled the classifieds in search of wallet-friendly green cars. Here are 20 eco warriors.