The average price of diesel was 190.6p on Wednesday morning, up 33.9% since February 28, the RAC said.
The UK’s average price of diesel has surpassed 190p a litre, having surged by more than a third since the start of the Iran war, new figures show.
But experts said the ceasefire agreement between the US and Iran has raised hopes that pump prices could “top out” in the coming days.
The average price of diesel was 190.6p on Wednesday morning, up 34% since February 28, the RAC said.
Petrol was also continuing to move higher with average unleaded prices reaching 151.7p, up 19% since the escalation of the conflict.
RAC head of policy Simon Williams said: “Both fuels are now at their most expensive since late 2022.
“The conditional ceasefire announcement may have taken some heat out of global oil prices, but the outlook for drivers in the UK remains highly uncertain.
“The best hope in the short-term is that pump prices stop rising at the rate they have been and hopefully top out in the coming days.”
