Move expected to make pump pricing more transparent and encourage competition after diesel hits record £2 a litre

Drivers will be able to see live petrol prices on Google Maps for the first time from Thursday, in a move that will help motorists shop around for the cheapest fuel.

Millions of motorists will be able to find the cheapest petrol and diesel prices by searching for a local forecourt in the Google app, in what could prove to be “a major development” in making fuel prices more fair, according to campaigners.