LONDON: Protesters snarled up major UK roads on Monday with a slow-moving procession of vehicles to demand government action against rocketing fuel prices.

The action came as senior criminal lawyers staged a second walkout in England and Wales against years of government cuts to their fees, intensifying a “summer of discontent” as strikes sweep Britain.

Rail workers have already staged a series of stoppages to press for better pay as Britain’s headline inflation reaches a 40-year high of just under 10 percent, driven in part by the war in Ukraine.

UK inflation hits new 40-year high of 9.1% in May, highest in G7

On the roads, a social media campaign called Fuel Price Stand Against Tax mobilised drivers to drive deliberately slowly on motorways and other arterial routes, demanding the government slash fuel duty.

One of the motorways affected was the M4 including the Prince of Wales Bridge, which links England and Wales. Welsh police said they had arrested 12 people for driving under 30 miles (48 kilometres) per hour for “a prolonged amount of time”. Vicky Stamper lost her job as a truck driver last month after the company was forced to cut costs in the face of the surging fuel costs.