Diesel prices in the UK have reached a record average of 199.18p per litre, as the Government enters urgent diplomatic talks to prevent a proposed US export ban that threatens to deepen the domestic energy crisis.
Chancellor of the Exchequer John Healey confirmed on 28 September 2026 that British officials are in “close talks” with the United States administration over the potential restrictions. The proposal, currently under consideration by President Donald Trump, aims to lower fuel costs within the US by halting the export of diesel to foreign markets.
However, such a move would have significant consequences for the UK’s fuel security. The United States currently provides approximately 31 per cent of all diesel imported into the UK. Any sudden withdrawal of American supply could lead to severe global price shocks and domestic shortages.
The cost to motorists
The surge in prices comes as Donald Trump considers a diesel export ban to tackle rising fuel prices within the United States. According to the latest data, the cost of filling an average family car has risen to nearly £110.
While diesel has hit the 199.18p mark, industry experts, including the RAC, have warned that motorists are unlikely to see significant relief at the pumps unless global oil prices remain stable for several consecutive weeks.
The rising cost of fuel has placed renewed pressure on the Treasury to consider further interventions, such as fuel duty adjustments, to support the haulage and agriculture sectors which are heavily dependent on diesel.
Emergency stocks and alternative markets
Speaking at the Labour Party Conference in Liverpool, the Chancellor sought to reassure the public regarding the UK’s immediate supply. Government figures from July 2026 indicate that the UK maintains emergency diesel stocks equivalent to roughly 42 days of typical demand.
If the US export ban is implemented, the Government may be forced to seek alternative supplies from the Middle East or the Netherlands. However, analysts suggest that securing these contracts quickly enough to prevent further price spikes would be a significant logistical challenge.
The proposal faces opposition not only from international allies but also from US refiners, who argue that a ban would disrupt global trade routes and potentially lead to a surplus that would discourage domestic production in the long term. For now, the policy remains a proposal rather than a confirmed decision, pending further negotiations between London and Washington.