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UK petrol prices have risen 31% and diesel prices 41% since late February, adding about £22 and £30, respectively, to the cost of filling an average car, according to the supplied source material. Drivers can limit costs by comparing station prices and improving fuel efficiency; electric-car charging prices have been more stable, though costs vary by charger and tariff.
Figures from the RAC Foundation, as cited in the source material, show fuel prices climbing after the conflict in Iran began in late February. Diesel was initially affected more sharply than petrol. Prices eased over the summer and the gap between the two narrowed, before both rose again. The report says diesel has reached its highest level since 2022, amid strong demand from haulage and shipping and limited supply.
The cost to an individual driver depends on the vehicle and annual mileage. The report’s running-cost comparison uses 5,561 miles a year, described as the average mileage in the publication’s latest car survey, and end-of-month prices from RAC Fuel Watch. It says tested petrol, diesel and hybrid cars have seen varying monthly costs since February; diesel efficiency can offset its higher pump price, but not in every case. Hybrid cars are less exposed because their batteries can improve efficiency.
For an example of how vehicle choice affects spending, the report estimates that a KGM Rexton, driven 463 miles a month, now costs just over £140 in fuel each month, about £40 more than in February. By contrast, charging an efficient electric car can be inexpensive with an off-peak home tariff, while public rapid charging generally costs more. The source reports that Zapmap recorded modest increases over the prior 12 months for off-peak home charging and slow public charging, while average rapid-charging prices recently fell during a temporary discount by operator MFG.
UK COST WATCH · SEPTEMBER 2026
How Soaring Fuel Prices Affect the Market—and Ways To Respond
Rising pump prices are squeezing drivers and freight operators. Your exposure depends on mileage, vehicle efficiency and where you refuel or recharge.
About £22 more to fill an average petrol car.
About £30 more for an average diesel-car fill.
Higher bills hit drivers unevenly
National averages show the direction of travel. A driver’s actual increase depends on vehicle, annual mileage, location and fuel economy.
Everyday budgets tighten
More expensive refuelling adds recurring costs, especially for people who drive long distances or rely on a larger, less efficient vehicle.
Diesel exposure runs deep
Strong demand from haulage and shipping, alongside limited supply, is cited as adding pressure to diesel prices.
More stable, still variable
Charging costs have been comparatively stable. Off-peak home charging can be inexpensive; frequent public rapid charging generally costs more.
Vehicle choice matters: the report estimates a KGM Rexton driven 463 miles a month now uses just over £140 of fuel monthly—about £40 more than in February. Efficient hybrids may use less fuel, but results vary by model and journey.
Diesel has climbed faster
Prices rose after the conflict in Iran began in late February 2026. Diesel was initially hit harder; prices eased over summer before rising again.
Local example: Costco had the lower listed price and requires membership; Welcome Break on the M1 had the higher price. Asda was listed at 164.7p/L. This is a dated snapshot, not a current nationwide comparison.
Supply pressures meet unsettled outlook
The supplied report links price movements to the Iran conflict, limited supply and strong freight demand, but does not quantify each factor. It says the war was expected to continue until at least November; that is an expectation, not a confirmed end date. A possible U.S. move to end diesel exports is also reported, not established policy.
Higher pump costs
Diesel is reported at its highest level since 2022. Future prices remain uncertain, with no confirmed date for a return to lower levels.
Tariff makes a difference
Off-peak home charging is described as the cheapest option. A reported domestic electricity VAT reduction from 5% to 0% is due October 2026–March 2027; household effects depend on use and tariff.
Discount has an end date
MFG’s temporary 25% discount cut its average from 79p to 59p/kWh from July 1, due to end September 30, 2026. The report does not quantify what follows.
Four ways to reduce the bill
Small decisions can help limit fuel use and avoid paying more than necessary at the pump or charger.
Compare nearby stations
Check local prices before setting out. Prices can vary sharply even within a short distance.
Use less fuel
Combine errands, avoid unnecessary trips, keep a steady speed and check tyre pressures.
Choose charging windows
Compare home and public tariffs; use off-peak home charging when practical.
Watch the next price signals
Track pump prices, supply changes and rapid-charging rates after the MFG offer ends.
What drivers should know
How much have UK prices risen?
The report says petrol is up 31% and diesel 41% since late February 2026, adding about £22 and £30 to average fills, respectively.
Why have prices increased?
The material points to the Iran conflict, limited supply and strong demand from haulage and shipping. It does not quantify each contribution.
Are electric cars unaffected?
No. Charging has been more stable, but costs still depend on charger type, location, timing and tariff. Rapid public charging can cost more.
When will fuel prices fall?
The source gives no confirmed date. The future path depends on uncertain conflict and supply pressures.
Higher Fuel Bills Hit Drivers Unevenly
The price increases raise recurring costs for households and businesses that rely on cars, vans or freight. The impact is not uniform: mileage, vehicle efficiency and fuel type all shape the bill, so national averages cannot predict an individual driver’s exact increase. Drivers of larger, less efficient vehicles can face substantially higher monthly costs than those using efficient cars.
Electric-car owners have had more stable energy costs in the period described, but savings depend on access to home charging and the tariff used. The supplied report says home charging on an off-peak EV tariff is cheapest, while relying on public rapid chargers can substantially increase the cost. It also says a domestic electricity VAT reduction, from 5% to 0%, was announced to run from October 2026 through March 2027; the effect on a household’s bill will depend on its electricity use and tariff.
Conflict and Supply Shape Prices
The source links the latest fuel-price moves to the conflict in Iran, which it says began in late February 2026. It reports that expectations at the time were for the war to continue until at least November. That forecast is not a confirmed end date, and the material does not establish how long elevated prices will last.
Diesel is especially sensitive to supply and demand from freight and shipping, according to the report. It also cites reports that U.S. President Donald Trump was considering ending all U.S. diesel exports. That possibility is presented as a report, not as a confirmed policy decision. For electric vehicles, the source says average rapid-charging prices were lowered by MFG’s temporary 25% discount, from 79p to 59p per kWh, starting July 1. It was due to end September 30, after which average rapid-charge prices could rise again.
Price Outlook Remains Unsettled
The supplied material does not give a confirmed timeline for fuel prices to fall or quantify how much the conflict, global demand or supply constraints each contribute to current prices. Its forecast that the war may continue until at least November is an expectation, not a settled outcome. The reported U.S. diesel-export proposal is also unconfirmed in the material.
The cited price data are snapshots and averages. Drivers’ actual costs vary with location, mileage, vehicle condition, fuel economy, charging access and tariff. The source does not provide enough detail here to independently assess every underlying price series or predict whether the MFG discount’s expiry will lift average rapid-charging prices by a particular amount.
Drivers Can Compare Local Prices
Motorists can compare nearby stations before filling up using services such as PetrolPrices.com. In an example dated September 24, 2026, the source says prices within 3.5 miles in Watford ranged from 161.9p per litre at Costco, which requires membership, to 196.9p at a Welcome Break service station on the M1. Asda was listed at 164.7p. Those figures describe that location and date; they are not a current nationwide comparison.
Drivers can also reduce consumption by avoiding unnecessary trips, keeping to steady speeds and checking tyre pressures. Electric-car owners can compare home and public charging tariffs and use lower-cost charging when practical. The next indicators to watch are changes in fuel supply and demand, pump-price data, the reported export proposal and charging prices after the MFG promotion ends. The source provides no confirmed date for a return to lower petrol or diesel prices.
Key Questions
How much have UK petrol and diesel prices risen?
The source reports that petrol rose 31% and diesel 41% since late February 2026. It estimates that filling an average car costs about £22 more for petrol and £30 more for diesel than before the rise.
Why have fuel prices increased?
The report links the increase to the conflict in Iran, alongside limited supplies and strong demand from haulage and shipping. It does not quantify the contribution of each factor.
How can drivers reduce fuel costs?
Compare nearby station prices before filling up, plan trips to avoid unnecessary mileage and drive efficiently. Local prices can differ substantially, but the Watford example in the source is a dated snapshot from September 24, 2026.
Are electric cars unaffected by rising energy costs?
No. The source says charging prices have been more stable than petrol and diesel, but costs still depend on where and when a driver charges. Off-peak home charging is described as cheapest; public rapid charging can cost more.
When will petrol and diesel prices fall?
The source does not give a confirmed date. It says prices may remain high while the conflict and supply pressures continue, but the duration and future price path are uncertain.
Source: rss
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