Ecotricity, whose 260 ‘Ecotricity Pumps’ cover almost the entire motorway network, will appear on Roadchef signs alongside household names as WH Smith, McDonald’s and Costa.

Dale Vince, founder of Ecotricity and the Electric Highway, said: “We launched the Electric Highway in 2011 to kickstart the electric car revolution in Britain, and we can see that’s well and truly underway now.

“There are now over 50,000 electric cars in Britain; that’s more than a tenfold increase in two years, and this exponential growth is reflected in the use of the Electric Highway, which powered 15 million miles of emission free driving last year – all powered from the wind and the sun.”