Supermarkets have slashed the price of petrol and diesel by up to 2p per litre – seeing forecourt prices fall across the country.

Asda has announced a national cap meaning motorists will not shell out more than 105.7ppl on unleaded and 106.7ppl on diesel across their 272 stations.

Tesco rolled out a 2p drop that came into effect from 5pm today.

Sainsbury's has also announced it will reduce pump prices for diesel and unleaded by up to 2p per litre across its 303 forecourts from Tuesday.

Last week, Morrisons kicked off the price cut by reducing the price of unleaded by 2p a litre - also cutting up to 1p a litre off diesel.

Recently, oil has hit about US$43 a barrel, the lowest level since early May.

In July the RAC said the price retailers pay for fuel had been falling for almost a month but pump prices remained largely static over the same period.

They claimed there was a "compelling case" for a forecourt reduction and hoped retailers were not taking advantage of public perceptions that fuel prices would rise after Brexit.

RAC spokesman Simon Williams praised the current price drop, but said it is a shame it "did not come sooner".

He added: "This price cut takes us back to a supermarket price that was last seen in early May. Hopefully other supermarkets will follow suit which will drive prices down across the country.

"If that happens we should see the average price of both petrol and diesel drop from around 112p a litre to 110p."

Luke Bosdet from the AA added: "Drivers are in a good place with pump prices this summer, paying as much as 5p a litre less than a year ago.

"However, with the weaker pound, it's more a case of pump paradise lost than pump paradise found."

He said had the pound regained last summer's value against the dollar, summer petrol prices in the UK would be at its cheapest for seven years.

FairFuelUK campaign said since Brexit there is still no sign of fuel suppliers passing on reduced oil prices to UK motorists.

Howard Cox, founder of the FairFuelUK campaign and secretariat to the APPG on FairFuel, said: "Our campaign supporters from UK motorists, hauliers and small businesses across the UK are incensed that in the five weeks since the EU referendum, significant falls in fuel wholesale prices have been ignored by retailers.

"We are told by some garage owners that they should not be blamed as they are not getting these published wholesale numbers and are being overcharged by as much as six pence per litre.

"So who is fleecing the motorist? What is the truth? It really is time for the Government to investigate the opaque pricing process at the pumps."

Motoring journalist and FairFuelUK campaigner Quentin Wilson also said "petrol margins at the pumps have doubled since Brexit", with diesel up by 50 per cent.

He added: "The whole fuel supply chain cartel seems to be colluding behind a smokescreen of post-Brexit uncertainty."