PETROL prices are set to drop below £1 a litre at Asda and Morrisons.From today, motorists filling up at any of Asda's stations will pay 99.7p per litre for unleaded and 103.7 for diesel until Sunday (December 13).Meanwhile drivers using a Morrisons petrol station will pay no more than 99.9p per litre from today. It is also cutting 1p from diesel prices. The supermarket has not confirmed how long the price cuts will run for.Earlier this week, Sainsbury's said it would be cutting up to 2p...
