British soldiers will start driving tankers soon to replenish empty pumps as drivers queued again for fuel after days of shortages, despite Prime Minister Boris Johnson saying the situation was improving.

Britain has been gripped by a rush of panic buying for almost a week that has left pumps dry across major cities, after oil companies warned they did not have enough tanker drivers to move petrol and diesel from refineries to filling stations.

Secretary of state for business Kwasi Kwarteng said 150 soldiers had been mobilised, and would be driving tankers within a few days.

“The last few days have been difficult, we’ve seen large queues. But I think the situation is stabilising, we’re getting petrol into the forecourts. I think we’re going to see our way through this,” Kwarteng said.

He said the government’s reserve tanker fleet, which numbers 80 vehicles according to a 2019 assessment, would be operating by later in the day, driven by civilians, to help deliver fuel across the country.

Johnson has sought to quell concerns, saying supplies were returning to normal while also urging people not to panic buy.

A shortage of around 100,000 drivers has sown chaos through supply chains and raised the spectre of empty shelves and price increases at Christmas.

Asked if he could guarantee that there would not be problems in the run-up to the busy retail period, Kwarteng said: “I’m not guaranteeing anything. All I’m saying is that, I think the situation is stabilising.”

By the early morning rush hour there were already long queues of cars in and around London and on the busy M25 orbital motorway circling the capital. Signs were up at some sites announcing no fuel was available.

The gridlock has sparked calls for doctors, nurses and other essential workers to be given priority access to fuel, a move Johnson has resisted.

Industry groups said the worst of the shortages seemed to be in London, the southeast and other English cities. Fights have broken out as drivers jostled.

The Petrol Retailers Association (PRA), which represents independent retailers who account for about two-thirds of all the 8,380 UK filling stations, said on Tuesday 37 per cent its members’ stations were out of fuel.