Military tanker drivers are prepared for deployment as panic buying dries pumps and pushes prices up.

Iran PressEurope: Britain’s army has been put on standby to deliver fuel as panic buying worsened a supply crisis, sending prices to an eight-year high.

Pictures have surfaced on social media showing a man holding a knife at a petrol station in south-east London, shouting at a driver in front of a gas station.

The Petrol Retailers Association (PRA) had earlier warned that up to 90 percent of petrol pumps were running dry in some areas of the United Kingdom due to supply chain issues, which were caused by a shortage of truck drivers, Aljazeera reported.

The PRA represents independent fuel retailers, who account for 65 percent of all UK forecourts.

Tempers have frayed as some drivers waited for hours, with sporadic fights breaking out as people jostled for access to petrol pumps.

Meanwhile, the average price of a liter of petrol rose to 1.366 pounds ($1.86) on Sunday, the highest level since September 2013, according to figures collated by the RAC, a motoring group.

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Thousands of petrol stations run out of fuel across UK as demand rises