In the already-rapid Honda hot hatch it’s sourced from, the 2-litre four turns out 324bhp. Installed in the regular Ariel Atom 4 (it seems wrong to use the word ‘regular’ for such a ...

And it’s the patriotically hued British Racing Green Lotus 49 Cosworth that springs to mind now, as I stand beside the new Ariel Atom 4, nearly 20 years after the first Atom appeared.