The UK's inflation rate increased to 3.1% in the year to August, according to the Office for National Statistics (ONS), up from 2.9% in July. This rise was largely anticipated by economists, with a consensus forecast of 3.1% from a Bloomberg poll. The primary driver of this increase was the rising cost of transport, particularly motor fuels, which saw prices in this division jump by 4.6% in the 12 months to August, compared to 3.6% in July. Petrol prices alone rose by 9.1 pence per litre between July and August 2026, a significant increase from the 0.3 pence per litre rise during the same period in 2025.
This surge in fuel prices is attributed to international events, specifically the US-Israel war in Iran which began at the end of February. The conflict led to a rise in wholesale oil prices, exacerbated by Iran's threats to shipping in the Strait of Hormuz, which increased oil transportation costs and maritime insurance. Although petrol and diesel prices briefly declined in June after a ceasefire agreement between the US and Iran, they rebounded in July when the ceasefire collapsed.
The broader inflation picture shows a continued upward trajectory since reaching a 15-month low of 2.6% in June. While higher fuel costs were the main factor, other contributors to inflationary pressures include increased energy bills for households, which saw a 13% rise in July due to an increase in the Ofgem price cap, adding $221 annually to a typical bill. Experts like Yael Selfin from KPMG anticipate inflation to peak around 3.5% in the coming months, partly due to further expected energy bill increases in October.
Motorists like Chloe in Essex are feeling the impact, noting that filling her one-litre engine petrol car now costs about $70 per week, totaling $280 to $300 a month, forcing her to limit travel. The Bank of England has a target inflation rate of 2%, and while the current rise is significant, some economists believe it may not immediately prompt a change in interest rates, with expectations for inflation to fall back to the target by the end of next year, provided energy prices stabilize.
