# What happened
Average diesel prices in Britain reached a new high on Sept. 28, 2026: 199.18p per litre, according to the RAC. That nudged past the previous record of 199.09p set in June 2022. Petrol is also rising, averaging 174.13p a litre.
# Why prices are higher now
The article links the spike to several supply-side disruptions: seven months of production and shipping problems in the Middle East since the U.S.-Israel conflict with Iran began, Ukrainian strikes that reduced Russian diesel exports by damaging refineries, and recent talk about a possible U.S. diesel export ban that would tighten supply for net importers like the UK.
Wholesale oil products have moved higher as these factors compounded, lifting retail pump prices.
# How large the increase has been
Diesel is up roughly 57p a litre since the start of the Middle East conflict—about a 40 percent increase. The article gives concrete consumer impacts: filling an average family car now costs almost £110, which is about £31 more than at the start of the war. A tank of unleaded is close to £96, up 41p a litre over the same period.
# Who will feel the pain
RAC head of policy Simon Williams is quoted noting both direct and indirect effects. Diesel powers lorries, vans, farms and construction equipment. Higher diesel costs affect freight and delivery, and those added transport costs will be passed on to consumers through higher prices for goods and services.
# Policy choices mentioned
The government could respond by reducing fuel duty further or cutting VAT on fuel. The article also notes a timing factor: a temporary duty cut is currently in place but could be reversed, which would add another 5p a litre to pump prices by spring if that reversal is applied.
# Context and related signals
The new UK peak follows an earlier spike in June 2022 tied to Russia's full-scale invasion of Ukraine. The piece references broader international reporting on record diesel highs in other countries and localized issues such as some U.S. pumps maxing out digital displays where prices exceeded the equipment limit.
# Bottom line