Iran Strait of Hormuz Closure Sends Oil Prices Surging — What It Means for UK Pump Prices
Iran has shut the Strait of Hormuz and threatened to halt all Middle East energy exports after the US reimposed a blockade of Iranian ports, sending oil prices to a one-month high and raising the prospect of higher petrol and diesel prices for UK drivers in the coming weeks. With Brent crude already at $87 a barrel and the UK average petrol price standing at 151.7p per litre, the renewed conflict threatens to reverse the brief price relief drivers saw in June.
Iran Shuts Strait of Hormuz — Oil Price Climbs Past One-Month High
On Wednesday 15 July 2026, Iran's Islamic Revolutionary Guard Corps (IRGC) announced it had closed the Strait of Hormuz, the critical waterway through which roughly a fifth of the world's oil and gas passes, in retaliation for a US blockade of Iranian ports that came into force the same day. The IRGC declared in a statement that "regional energy exports are either shared by all or denied to all" and that the strait would remain closed until the "end of America's evils," according to The Guardian.
The escalation drove the price of crude oil still higher on Wednesday, building on a one-month high already reached on Tuesday. Brent crude, the international benchmark, had risen by as much as 4.6% to $87.08 a barrel on Tuesday before settling roughly 1% up, as reported by The Guardian. The strait closure means those gains are likely to extend further as markets price in the disruption to global supply chains.
The US said Iran had attacked seven commercial ships in the strait in the preceding week, with nearly a dozen crew members killed, missing, or injured. Iran also launched airstrikes on Bahrain, Jordan, and Kuwait — countries hosting US military forces. Jordan said it intercepted three ballistic missiles on Wednesday, while Kuwait was working to extinguish fires caused by Iranian attacks. US President Donald Trump threatened to begin targeting Iranian power plants and bridges if a deal was not reached by the following week, saying in a Fox News interview: "Next week it gets really bad for them because next week comes the power plants. Next week comes the bridges."
What This Means for UK Fuel Prices
The UK average petrol price currently stands at 151.7p per litre, according to data from the UK Government Fuel Finder, updated on 15 July 2026. The cheapest petrol in the country is available at 123.9p per litre, while the most expensive forecourts are charging as much as 289.9p per litre — a staggering spread of 166p per litre between the cheapest and dearest pumps.
The renewed oil price surge puts upward pressure on wholesale fuel costs, which typically feed through to pump prices within one to two weeks. When the US-Iran conflict first erupted earlier in 2026, wholesale oil prices jumped from around $70 a barrel to almost $120 a barrel by the end of March, as the BBC reported. That spike pushed UK heating oil prices up by 92% at their peak, to 123p a litre, and the Competition and Markets Authority (CMA) found that approximately 1,700 households had their heating oil orders cancelled and were forced to pay up to £350 more for replacement fuel.
The current escalation comes just weeks after a brief US-Iran ceasefire had brought energy prices down. UK inflation cooled to 3.5% in June, partly because gasoline prices dropped 9.7% from May to June during that truce, as The Guardian reported. But with the ceasefire now shattered, those gains are being rapidly unwound. Brent crude hit $80 on Monday 14 July, up from a recent low of $67 earlier in the month, before climbing further to $87.08 on Tuesday.
UK natural gas prices have also climbed, with the August delivery contract rising 3.3% to 129.4p a therm — the highest level in more than three months. Dutch natural gas, the European benchmark, rose nearly 3% to €52.8 a megawatt hour. These energy price increases feed through not only to fuel costs but also to electricity prices, since UK power generation remains heavily reliant on gas.
Interest Rate Rises Could Compound Cost-of-Living Pressure
For the first time in a month, financial markets have priced in a quarter-point UK interest rate rise by September, with a probable follow-on increase by the end of the year, according to The Guardian. The European Central Bank is similarly expected to raise rates. UK government bond yields rose to their highest level since May, with the 10-year gilt briefly exceeding 5%.
Higher interest rates would increase borrowing costs for households already contending with elevated fuel and energy bills. The CMA's heating oil investigation, published on 15 July, revealed that about 1.5 million UK households — mostly in rural areas not connected to the mains gas network — rely on heating oil and do not have the same consumer protections as those on the gas grid. The regulator has recommended that the UK and devolved governments introduce a new regulatory regime for heating oil suppliers, including a register of suppliers, minimum standards for order cancellations, and access to independent dispute resolution.
Chancellor Rachel Reeves said: "It is reassuring to know it is a competitive market but the lack of protection for these households does concern me so we will look very seriously at what can be done."
North Sea Oil Industry Seizes the Moment
The renewed crisis has strengthened the case being made by the UK's North Sea oil industry for more domestic drilling. On 14 July, industry group Offshore Energies UK (OEUK) wrote to more than 400 Labour MPs urging the incoming government under prospective prime minister Andy Burnham to approve new oil and gas drilling in UK waters, including the contested Rosebank and Jackdaw projects, as The Guardian reported.
The letter, co-signed by more than 10 business groups and the GMB trade union, argued that Britain "will continue to need oil and gas for decades to come" and that the question was "whether we produce as much of them as possible ourselves or become increasingly dependent on imports from overseas." The industry's push comes at a time when global supply disruption from the Middle East is acutely highlighting the UK's reliance on imported energy.
However, campaigners countered that new drilling would do little for energy security in the short term. Robert Palmer of Uplift said: "New drilling will do little for energy security. Without a rapid shift to the abundant renewable energy we have, and help to households to shift away from their reliance on fossil fuels, the UK will become ever more reliant on imported gas."
A report by the CBI and Energy UK warned that Great Britain's electricity prices are about 45% above the G7 median and represent "an anchor weighing down productivity and competitiveness across the whole economy."
Regional UK Petrol Price Breakdown
The latest UK Government Fuel Finder data, as of 15 July 2026, shows significant regional variation in petrol prices across the country:
- United Kingdom average: 151.7p per litre (cheapest: 123.9p, dearest: 289.9p)
- North of England: 150.4p per litre (cheapest: 135.9p, dearest: 289.9p)
- Midlands: 152.1p per litre (cheapest: 139.6p, dearest: 199.9p)
- South of England: 152.9p per litre (cheapest: 138.1p, dearest: 239.9p)
- Belfast: 145.6p per litre (cheapest: 123.9p, dearest: 161.9p)
- Glasgow: 152.8p per litre (cheapest: 141.9p, dearest: 183.9p)
- Edinburgh: 152.6p per litre (cheapest: 141.9p, dearest: 180.9p)
- Aberdeen: 154.9p per litre (cheapest: 146.9p, dearest: 171.9p)
Belfast remains the cheapest major city for petrol, with the lowest average price and the cheapest individual forecourt in the UK at 123.9p per litre. The South of England has the highest regional average at 152.9p, though it is the North of England that hosts the country's most expensive forecourt at 289.9p per litre — likely a motorway service station with premium pricing.
What This Means for Drivers
The renewed Iran-US conflict and the closure of the Strait of Hormuz create clear upward pressure on pump prices. When the conflict previously escalated in March, wholesale oil nearly doubled and heating oil surged 92%. The current escalation has already pushed Brent crude from $67 to over $87 in under two weeks, and with the strait now fully closed, further gains are likely.
Drivers should expect pump prices to rise over the next one to two weeks as higher wholesale costs feed through to forecourts. The price of diesel, which is more closely linked to crude oil costs than petrol, may rise first and fastest. However, the trajectory will depend heavily on how long the strait remains closed and whether diplomatic efforts can restore a ceasefire.
The brief June ceasefire demonstrated how quickly prices can fall when tensions ease — inflation dropped and fuel costs retreated. But until a new agreement is reached, the direction of travel for pump prices is upwards.
How to Save on Fuel
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Compare forecourt prices before you fill up: The difference between the cheapest and most expensive petrol in the UK is currently 166p per litre. Use PetrolPricesNearYou.com to find the cheapest petrol near you and avoid overpaying at motorway service stations, where prices can be double the cheapest available.
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Use loyalty schemes and supermarket fuel where cheaper: Supermarket forecourts often undercut branded stations, though this is not guaranteed — check live prices rather than assuming. Many supermarkets and fuel brands offer loyalty cards that can shave a few pence per litre off each fill-up.
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Drive efficiently to reduce consumption: Smooth acceleration, maintaining correct tyre pressure, removing roof boxes when not in use, and avoiding unnecessary idling can improve fuel economy by 10-15%, effectively reducing your cost per mile even if pump prices rise.
Sources
- The Guardian — "Iran threatens to halt all Middle East energy exports amid renewed US blockade" — 15 July 2026
- The Guardian — "Oil price jumps as US-Iran clashes raise odds of interest rate rises" — 14 July 2026
- BBC News — "Heating oil customers to get compensation after cancelled orders and price hikes" — 15 July 2026
- The Guardian — "North Sea oil industry urges Burnham to approve new drilling in UK waters" — 14 July 2026
- The Guardian — "Inflation cools to 3.5% in June in relief brought by brief US-Iran peace deal" — 14 July 2026
- UK Government Fuel Finder data via PetrolPricesNearYou.com — as of 15 July 2026