Top 5 Congestion Charge-busting new cars

As of July 1, the threshold for London's Congestion Charge exemption will drop from its current emissions level of 99g/km to 75g/km.

It'll mean several hybrid cars are no longer eligible to drive into the centre of the city without having to pay – but worry not, because there are still plenty of options out there that'll get you a free ticket into the centre of the big smoke.

Alex Robbins has put together five eco warriors that emit nothing but the faintest wisps, and in doing so, will save you a packet on your commute into the capital.