Some supermarkets have been charging drivers 6p more per litre of fuel, costing motorists £900 million in a single year, a government watchdog has found.

In response to the findings, the government is preparing to force retailers to publicly state how much they are charging at the pump so that drivers can compare prices in real time.

But until then, you can find out the petrol and diesel prices in Blackburn by using the PetrolPrices app.

Here’s a list of some of the places you can get the cheapest petrol and diesel in Blackburn.

Lancashire Telegraph: The PetrolPrices app shows motorists the cheapest places to fill their vehicles with petrol or dieselThe PetrolPrices app shows motorists the cheapest places to fill their vehicles with petrol or diesel (Image: PA Wire/PA Images)

The PetrolPrices app has collated the cost of fuel at a number of forecourts in the town and the prices are updated regularly.

Cheapest places to fill up with petrol or diesel in Blackburn

Here are the cheapest places to fill your vehicle with fuel in Blackburn, according to the PetrolPrices app.

The app tells users when each price was last updated.

Cheapest places to fill up with petrol

These fuel prices are the latest at the time of writing.

Jet Blackburn (Superfine Service Station)

Unleaded: 141.9p

Texaco Tottenham Road (Tottenham Road Garage)

Unleaded: 141.9p

Shell King Street (Blackburn Service Station)

Unleaded: 142.9p

BP Preston New Road (Preston Way Filling Station)

Unleaded: 142.9p

Esso Preston New Road (RSS West End)

Unleaded: 142.9p

Esso Bolton Road (MFG Ewood)

Unleaded: 142.9p

Shell Preston New Road (Windmill Petrol Station)

Unleaded: 142.9p

Lancashire Telegraph: Prices for fuel are updated regularly on the PetrolPrices appPrices for fuel are updated regularly on the PetrolPrices app (Image: PA Wire)

Cheapest places to fill up with diesel

These fuel prices are the latest at the time of writing.

Texaco Tottenham Road (Tottenham Toad Garage)

Diesel: 142.9p

BP Preston New Road (Preston Way Filling Station)

Diesel: 143.9p

Esso Preston New Road (RSS West End)

Diesel: 143.9p

Esso Bolton Road (MFG Ewood)

Diesel: 143.9p

Asda Blackburn Automat

Diesel: 144.7p

Morrisons Great Harwood

Diesel: 144.7p

Keep up to date with fuel prices in your area via the PetrolPrices app.