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Price of diesel in UK hits all-time high, new figures show
RAC figures show diesel costs are still rising, and officials are revisiting emergency fuel plans that could prioritize critical services and limit demand.
On Monday, September 28, 2026, average UK diesel prices reached a record high of 199.18p per litre, according to the Royal Automobile Club , surpassing the previous peak of 199.09p set in June 2022.
Global supply disruptions linked to the ongoing US-Iran conflict and the Russia-Ukraine war drove the surge, as hostilities restricted refined diesel flows and constrained international markets.
Simon Williams, RAC head of policy, said the record price "spells pain not only at the pumps for drivers, but for everyone who buys goods or services that rely on diesel lorries and vans." Filling an average family car now costs nearly £110.
Contingency measures including "diesel rationing" and a 50mph speed limit are under review as officials evaluate emergency powers under the Energy Act 1976 if supply shortages worsen.
President Trump has indicated consideration of a ban on US diesel sales overseas, which could further elevate UK prices and complicate the government's ability to stabilize domestic fuel costs.