Trump said on Tuesday that he supported the idea of a diesel export ban as US politicians search for ways to bring down record domestic fuel prices. The proposal has yet to become government policy, and US Energy Secretary Chris Wright has since publicly opposed an outright ban, warning that it could backfire.
For Britain, however, even the prospect of restrictions matters as the United States has become one of the UK’s most important sources of diesel, while the domestic refining industry has shrunk significantly. UK government figures show that the Netherlands and United States supplied 58% of Britain’s white-diesel imports in 2025, together meeting 32% of total UK demand. The shift follows the end of Russian supplies and the closure of the Grangemouth and Lindsey refineries. Britain now has only four operating oil refineries.
The country’s reliance on imported diesel is particularly significant for road freight, where operators have already been dealing with sharply higher fuel costs.
US restrictions could tighten an already stretched market
Trump’s intervention comes as the international diesel market is experiencing an unusually severe supply crunch. European diesel futures have more than doubled since the beginning of the year, according to Reuters, as the wars involving Iran and Ukraine have disrupted production and exports from several major suppliers.
Middle Eastern diesel exports between March and August were around half their level during the same period last year, while Russian supplies have also been constrained. Refineries elsewhere are already running at high utilisation rates, leaving limited spare capacity to replace lost production.
The United States has consequently become increasingly important to the international market. Restricting its exports could force European buyers to compete more aggressively for alternative cargoes from countries including India and suppliers in the Middle East. S&P Global estimates that the US was on course to export around 360,000 barrels of diesel a day to Europe in the third quarter, compared with approximately 250,000 barrels a day before the current Middle East conflict. The UK is among the markets particularly exposed to any disruption.
Shortages unlikely immediately
An export restriction would not necessarily mean British filling stations running out of diesel. The UK continues to source fuel from several countries, and the government maintains that supplies are resilient. Government data show that Britain imported diesel from 28 trading partners in 2024.
A UK government spokesperson said this week that forecourts were being supplied normally and described Britain’s fuel supply as “diverse and resilient”. However, analysts warn that removing US cargoes from an already tight international market could increase competition for the remaining supplies and put further upward pressure on wholesale prices. The risk would become greater if restrictions remained in place for an extended period.
Trump administration divided over export ban
Whether a ban will actually happen remains uncertain. Trump backed the idea on Tuesday amid political pressure over record US diesel prices. But a day later, Energy Secretary Chris Wright rejected an outright prohibition, saying a blanket export ban would not work and could instead push up US petrol and jet-fuel prices.
Analysts have also warned that preventing US refiners from selling surplus diesel abroad could eventually cause them to reduce refinery output, potentially tightening rather than increasing overall fuel supplies.
