In terms of the exterior styling it appears to be a blink-and-you'll-miss-it update, but the secret of the revised Renault Zoe - the first details of which have leaked out ahead of its Paris motor show debut - lies in the new 41KWh battery.

Revealed: upgraded Renault Zoe gets 250-mile range

If my Dutch translation is sound, that means the new Zoe can deliver a certified 400km (248-mile) range when run through the official NEDC test cycle.

That's a significant doubling of the claimed range on offer now, and a signal of how fast the pure electric car battery arms race is winding up on the forecourts, primarily as Renault fights with its Nissan Leaf stablemate for supremacy in the mainstream, while the Tesla Model S and Model X set the standard at the premium end of the market. 

The BMW i3, meanwhile, has a claimed range of 195 miles, which equates to a usable ‘real world’ range of around 125 miles.