UK petrol prices near peak as Iran risk lifts costs

Petrol prices across the UK have been rising for more than a month, and a new report says pump prices are now close to a possible turning point after higher costs linked to what it described as an “Iran conflict peak” in fuel markets. The report argues that a geopolitical risk premium has lifted wholesale costs and is still feeding through to what drivers pay at the forecourt.

It also flagged sharp differences in advertised pump prices within short distances. According to the report, motorists can face materially different prices within a 10 mile radius depending on which station they choose, underscoring how local competition and retailer pricing decisions can quickly become a practical cost issue for households.

How wholesale moves reach UK forecourts

Persian Gulf

The repoSources said UK retail fuel prices generally track wholesale market moves with a delay. That lag reflects how retailers source fuel, hold inventory, and manage replenishment, meaning sudden shifts in upstream costs are not always visible immediately in pump prices. Wholesale pricing, the report noted, is shaped by several components, including crude oil benchmarks, refinery margins, distribution and logistics costs, and retailer pricing strategies. When those inputs change quickly, the repoSources said the retail response can be uneven across regions and brands. Iran and the risk premium around key shipping routes The report linked part of the recent pressure to global markets pricing in geopolitical risk around major oil-producing regions, stressing that perceived risk can lift costs even without a physical disruption. It said that higher wholesale prices can then filter into refined fuels such as petrol and diesel.

Iran features in that risk narrative because of Iran features in that risk narrative because of its location near major energy shipping lanes, including the Strait of Hormuz, which connects Persian Gulf producers to global markets. The repoSources said tension involving Iran can be treated by traders as a potential threat to flows, even when no interruption has occurred, creating a risk premium that can raise oil prices and, later, UK pump prices.

Household budgets, business costs, and local price dispersion For households, the repoSources said a prolonged period of higher prices can tighten budgets and raise commuting costs. It added that discretionary travel decisions can be affected, particularly for drivers with limited alternatives to car use.

For businesses, the repoSources said higher fuel costs can push up delivery and logistics expenses. It highlighted that sectors with thin margins and high transport intensity can feel the impact quickly, raising questions for firms about whether and how to pass costs on.

The report also described wide local price dispersion as a consumer issue. It said large gaps over short distances can benefit drivers who can compare prices and travel to cheaper stations, while disadvantaging those with fewer nearby options or less flexibility.

The report’s test for a downturn by 2026-09-15

The report described pump prices as “teetering on a downturn” and proposed a concrete way to judge that call over time. By 2026-09-15, it said the outlook would appear correct if average advertised pump prices fall for at least two consecutive weeks.

It added that the call would look wrong if prices are flat-to-higher over the same window, indicating wholesale-to-retail pass-through is still working through the system. In the near term, the report framed the main uncertainty as whether the risk premium embedded in wholesale costs eases quickly enough to show up at the pump, and whether local pricing gaps narrow or persist even if average prices soften.