(Bloomberg) -- Petrol shortages are worsening in parts of the U.K. as more stations run dry following panic buying, as the government considers easing visa rules to attract truck drivers from Europe.

Britain is short about 100,000 heavy goods vehicle (HGV) drivers licensed to operate trucks or lorries, the Road Haulage Association has estimated. 

To start plugging the gap, Prime Minister Boris Johnson’s government is considering issuing temporary visas for truckers. As many as 5,000 such visas may be announced this weekend, according to newspaper reports.

Reports of shortages had a cascading effect as drivers rushed to fill their tanks. Some stations closed entirely, while others experienced shortages of one or more types of fuel, and waiting times increased. 

But stocks are ample in the country and there’s no shortage of fuel, a government spokesman said on Friday. 

An estimated 1% of Britain’s 8,380 petrol stations are closed at the moment. Estimates on shortages vary for different suppliers and can change rapidly. The BBC reported that about 20 of BP’s petrol forecourts were closed, and 50 to 100 were short at least one grade of fuel. 

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The crunch has coincided with an energy crisis in the U.K. caused by the surging price of natural gas and electricity. Several suppliers have already collapsed, and millions of Britons face significantly higher bills heading into winter.

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Allowing thousands of European truckers to plug labor shortages crippling parts of the U.K. supply chain would undermine a key element of Johnson’s anti-immigration Brexit project. 

“We’re looking at temporary measures to avoid any immediate problems,” a Downing Street spokesperson said in a statement late on Friday. “But any measures we introduce will be very strictly time limited.”

Edmund King, president of the motoring association AA, told the BBC the impact of panic buying should subside quickly.  

“Once people fill up, they won’t travel more than they would normally travel, so the strain on the system should ease up in the next few days,” said King, who was involved in emergency talks with the government on Friday.    

As an example, one petrol station in Stockport, near Manchester, sold 6,159 gallons (28,000 litres) of fuel on Friday, compared to 1,760 gallons (8,000 litres) on the same day the previous week, according to the BBC. 

A small number of Esso-branded pump stations have been impacted in some way, a spokesman for Exxon Mobil said on Friday. 

EG Group, owner of the Asda retail brand, will limit each customer to 30 pounds ($41) on all grades of fuel -- about a third of a tank on a typical car -- because of what it called unprecedented demand, it said in a statement late Friday. 

At Tesco, there is “good availability of fuel, with deliveries arriving at our petrol filling stations across the U.K. every day.”  

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