Tesco has reignited the petrol price war by cutting 3p per litre off both petrol and diesel.

The cut, which takes effect at all of Tesco's 430 filling stations from today, makes Tesco the cheapest supermarket petrol retailer, the company claimed.

Tesco will also offer shoppers double Clubcard points on every fuel purchase from Friday.

Fuel prices became a major battleground between the major supermarkets in 2008, with evidence that cheap petrol was acting as a significant driver of footfall to the stores themselves.