UK ENERGY AND FUEL : 18 MAY 2026Brent crude jumped above $110 per barrel in mid-May 2026 as fears returned over disruption to the Strait of Hormuz. The pass-through to UK petrol pump prices and the Ofgem household energy price cap is now the central question for cost-of-living pressures through summer 2026.
Brent crude prices surged above $110 per barrel on 16 May 2026 after renewed concerns over the Strait of Hormuz, which carries roughly 20% of the world's seaborne oil and a major share of liquefied natural gas. Through 18 May 2026, oil remained above $110 with traders pricing in a higher geopolitical risk premium and analysts at Oxford Economics and ING revising scenarios upward.
The UK is exposed to global energy markets to an unusual degree among large advanced economies. It imports around 44% of its energy, principally natural gas, which links the wholesale UK gas price closely to the global LNG benchmark. Petrol and diesel prices at UK pumps follow Brent crude with a lag of two to four weeks, modified by exchange rate movements and refinery margins. Ofgem's energy price cap is reset quarterly using wholesale gas and electricity prices over a defined observation window, which means a shock in May feeds into the household bill that takes effect later in the year.
Key Facts
- Brent crude above $110 per barrel as of mid-May 2026
- UK imports around 44% of its energy, principally natural gas
- Strait of Hormuz handles roughly 20% of global seaborne oil
- UK pump prices follow Brent with a two to four week lag
- Ofgem price cap is reset quarterly: next cap takes effect 1 July 2026
- UK CPI rose to 3.3% in March 2026, with motor fuel a key contributor
Why oil above $110 matters for the UK
Oil prices feed into the UK economy through three main channels. The first is direct fuel cost: petrol and diesel at the pump, gas oil for heating in rural off-grid homes, and aviation fuel for the airlines that price through to UK travellers. The second is electricity generation: UK power prices are still set by the marginal generator under the current market structure, which is frequently a gas-fired plant, so a higher gas price flows directly into UK wholesale electricity costs. The third is indirect: transport, manufacturing and food production all carry an energy cost that filters into consumer prices over the following months.
The UK is more exposed to oil and gas shocks than economies such as the United States or Norway, which produce most of the energy they consume. The April 2026 Monetary Policy Report from the Bank of England noted that the UK's import dependence amplifies the inflation impact of global energy price moves, and that the effect is faster than in economies with deeper domestic energy supply.
What this does to UK petrol pump prices
UK pump prices are made up of the wholesale fuel cost, fuel duty, VAT and the retailer margin. Fuel duty for petrol and diesel is currently set at 52.95 pence per litre. VAT is applied at 20% to the final price, including duty. The wholesale element is where Brent crude shows up, modified by refinery margins and the pound-dollar exchange rate, because oil is priced in US dollars.
As a rough guide, every $10 per barrel sustained move in Brent feeds through to around 6 to 8 pence per litre on UK pump prices, before tax effects. The CMA Fuel Finder enforcement scheme, which became live on 1 May 2026, requires petrol retailers to publish accurate forecourt prices in near real time, increasing transparency but not changing the underlying input cost. Drivers concerned about pricing transparency can check Fuel Finder data once it is fully populated.
The Ofgem price cap and household energy bills
Ofgem sets the energy price cap for default tariff customers in England, Wales and Scotland and reviews it quarterly. The cap is calculated on a defined observation window of wholesale gas and electricity prices, network costs, policy costs and supplier allowed margin. The cap that takes effect on 1 July 2026 will reflect wholesale conditions during the prior observation window, which means the May 2026 oil and gas price spike will partially feed in.
The cap is not a cap on the total bill, but a cap on the unit rate of energy and the standing charge. A household's actual bill depends on consumption. Ofgem publishes the typical annual figure for an average dual-fuel direct debit customer, which is what most media coverage references. The next cap announcement is due ahead of the July 2026 implementation date and will be the first to capture meaningful pass-through from the renewed oil price rise.
What households can do now
For motoring costs, the levers available are demand-side: reducing miles driven where practical, smoothing acceleration and braking which can affect fuel economy by 10 to 20%, and using the CMA Fuel Finder transparency scheme to compare pump prices in a local area. Fuel duty is set by HM Treasury and the level for the current fiscal year is fixed.
For home energy, the practical steps depend on tenure and consumption. Homeowners can review insulation, smart meter data and heating controls. Renters have fewer structural options but can review supplier choice, although the price cap on default tariffs limits the spread between providers in the regulated market. Households on prepayment, on low incomes, or in vulnerable circumstances may be eligible for the Warm Home Discount, the Cold Weather Payment, the Household Support Fund or local authority schemes. The eligibility criteria and amounts are set by central and local government and change year to year.
The scenario picture from here
The Bank of England's April 2026 Monetary Policy Report set out three scenarios for oil prices and UK inflation. In the lower scenario, oil peaks at $108 and falls back below $80 by early 2027. In the central scenario, oil stays in the $85 to $100 range through the second half of 2026 with elevated mortgage and inflation costs but no second-round wage-price spiral. In the higher scenario, oil peaks above $130 and remains elevated for a year, with UK CPI peaking above 6% in early 2027.
The mid-May 2026 oil price of above $110 sits between the central and higher scenarios. Oxford Economics and ING analysts have flagged that the path from here depends heavily on whether the Strait of Hormuz remains open, the extent of damage to Qatari LNG infrastructure from earlier in the conflict, and any progress on US-Iran negotiations. None of these can be forecast with confidence and the next several weeks will be informative.
Disclaimer: This article is general information about UK energy and fuel costs in May 2026. It is not financial, energy procurement or policy advice. Energy markets, the Ofgem price cap and fuel pump prices change frequently and individual household circumstances vary. Anyone making energy supply, fuel hedging or budgeting decisions based on the figures here should verify against current Ofgem, CMA and HMRC information. Kael Tripton Ltd is not authorised or regulated by the Financial Conduct Authority.
Frequently asked questions
Why is oil above $110 in May 2026
Brent crude rose above $110 per barrel in mid-May 2026 as renewed concerns over the Strait of Hormuz revived the geopolitical risk premium. The Strait carries roughly 20% of global seaborne oil and a major share of LNG, making it the single most important chokepoint in global energy supply.
How quickly do UK petrol prices follow oil prices
UK pump prices typically follow Brent crude with a lag of two to four weeks, modified by the pound-dollar exchange rate and refinery margins. A sustained $10 per barrel move in Brent translates to around 6 to 8 pence per litre at UK forecourts, before tax effects.
Will the Ofgem price cap rise in July 2026
The Ofgem price cap for the period from 1 July 2026 has not yet been announced as of 18 May 2026. The cap is calculated on a defined observation window of wholesale energy prices, network costs and policy costs. The May 2026 oil and gas price rise will partially feed through to the July cap. The announcement is due ahead of the implementation date.
How much of UK energy is imported
The UK imports around 44% of its energy, principally natural gas. This makes the UK economy more exposed to global energy price shocks than countries that are major energy producers, such as the United States or Norway.
What is the CMA Fuel Finder scheme
The CMA Fuel Finder enforcement scheme came into force on 1 May 2026. It requires UK petrol retailers to publish accurate forecourt prices in near real time, increasing price transparency for drivers. It is enforced by the Competition and Markets Authority and was introduced following the 2023 fuel market study finding that retailer margins had widened during periods of high wholesale prices.
Related guides
- UK Business Energy Hub
- Best UK Energy Suppliers
- UK Mortgage Rates and the Iran War
- Warm Home Discount UK Eligibility
Sources and verification
- Bank of England, "Monetary Policy Report" (April 2026)
- Office for National Statistics, "Consumer price inflation, UK: March 2026"
- Ofgem energy price cap methodology and observation window data
- Competition and Markets Authority, Fuel Finder scheme guidance (effective 1 May 2026)
- HM Revenue and Customs, fuel duty rates and VAT guidance
- UK Government Department for Energy Security and Net Zero, UK energy import statistics
