Officials said the move would make it easier for companies to share information and prioritise parts of the country most at need.

It follows days of long queues at the pumps after fears of disruption to the fuel supply sparked panic buying.

Ministers are also considering deploying the Army to deliver fuel.

The option is under discussion, and could be discussed at a possible cabinet meeting on Monday.

The Petrol Retailers Association has warned that as many as two-thirds of its membership of nearly 5,500 independent outlets are out of fuel, with the rest of them "partly dry and running out soon".

Announcing the measure to exempt the oil industry from the Competition Act 1998, Business Secretary Kwasi Kwarteng said the government had "long-standing" contingency plans in place to maintain fuel supplies.

"While there has always been and continues to be plenty of fuel at refineries and terminals, we are aware that there have been some issues with supply chains.

"This is why we will enact the Downstream Oil Protocol to ensure industry can share vital information and work together more effectively to ensure disruption is minimised.

"We thank HGV drivers and all forecourt staff for their tireless work during this period."

A shortage of lorry drivers has caused problems for a range of industries in recent months, from supermarkets to fast food chains.

In recent days, some fuel deliveries were affected, leading to panic buying and lengthy queues at some petrol stations.

In a joint statement from companies including Shell, ExxonMobile and Greenergy, the industry reiterated that pressures on supply were being caused by "temporary spikes in customer demand - not a national shortage of fuel".

PRA chairman Brian Madderson told the BBC the shortages were down to "panic buying, pure and simple", with oil companies prioritising keeping motorway service station pumps topped up.

On Saturday the government announced it would offer temporary visas, lasting until Christmas Eve, to 5,000 foreign fuel tanker and food lorry drivers and 5,500 poultry workers in a bid to limit disruption in the build up to Christmas.

Other measures include sending nearly one million letters to drivers who hold an HGV licence - to encourage them back into the industry - and plans to train 4,000 people to become HGV drivers.

But the British Retail Consortium said the number of visas being offered was "too small" to make an impact on the disruption expected at Christmas.

Andrew Opie, director of food and sustainability policy at the trade association, told the BBC: "I think we're going to see less choice, less availability, possibly a shorter shelf life as well, which is really disappointing because this could have been averted."

Meanwhile, Turkey farmer Kate Martin warned supermarkets could run out of poultry before Christmas.

She said there were fewer turkeys being produced because because the big processors "know they will not get them processed".

Recruitment for additional short-term HGV drivers and poultry workers will begin in October, with the visas valid until Christmas Eve.