Oil prices fall as Iran peace deal looks closer - when will petrol and diesel prices drop and by how much?

Fuel prices are expected to fall back significantly over the coming days and weeks as the oil market responds to an imminent end to the Iran war. Both US President Donald Trump and Iranian officials confirmed on Sunday they have agreed on a framework to end the conflict, sparking an immediate fall in oil prices. The international benchmark Brent crude dipped below $83 a barrel on Monday morning – its lowest level since the opening days of March.

With prices at $72 before the war began, oil surged to a high of $126 in April following the continued closure of the Strait of Hormuz as Iran strangled the supply of oil out of the Middle East. This has inflated the cost of filling up for Britain's drivers. The average UK price of petrol hit a 2026 high of 159.7p per litre on 28 May, while diesel peaked at 192.3p on 15 April.

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