Drivers looking for cheaper petrol are being urged to ditch Asda and switch to Tesco for bigger savings at the pumps.

The latest analysis shows petrol and diesel prices are rising again for the fourth month in a row and those who haven’t filled up in a while could be stung by a nasty surprise on the forecourt.

This week it was announced that petrol prices have gone up 3p and diesel by 2p, heaping more misery on drivers already counting the cost of increased insurance premiums and more…