MOTORISTS heading into the weekend will be able to take advantage of the lowest petrol prices for nearly four years.

In the face of plunging international oil prices, four leading supermarkets all announced they were cutting 1p a litre off their petrol and diesel.

The Tesco reduction takes effect from lunchtime today, while the cuts at Asda, Sainsbury's and Morrisons will all be introduced tomorrow.

In Asda's case, this means petrol will fall to 119.7p a litre and diesel will be 123.7p.

Supermarkets have steadily reduced pump prices over recent weeks and the new prices will be the lowest since January 2011.

Pete Williams, head of external affairs at the RAC, said: "We welcome the move today by some fuel retailers to cut the price at the pump and hope others will follow suit swiftly.

"Motorists will be delighted to see the price of unleaded dropping below £1.20 for the first time in four years but the RAC is calling for a further 4p cut in unleaded and 2p cut in the price of diesel to be fair to motorists."