Prime Minister Boris Johnson is under increasing pressure to do more to ease a supply chain crisis in Britain after panic buying at some gasoline stands caused pumps to run dry.

With a shortage of truck drivers raising the prospect of widening disruption to food and fuel deliveries in coming weeks, the government moved late on Sunday to temporarily suspend competition rules and allow companies to coordinate fuel supplies to the most affected regions.

That came after Johnson announced measures including a u-turn on relaxing immigration rules for foreign truckers and poultry workers and called in army examiners to help ramp up driving tests for heavy goods vehicles.