Diesel prices in the UK have hit an all time high - here's why

LONDON – UK motorists are facing unprecedented costs at the pump as the average price of diesel has breached the symbolic and economically painful £2 per litre mark for the first time in history. The milestone, confirmed by motoring group RAC, signals a new chapter in the nation's cost of living crisis and puts immense pressure on businesses and households alike.

The surge is not isolated to diesel. Petrol prices have also soared to a new record of 174.71p a litre on average, according to the latest data. The RAC has warned that the relentless price rises are "showing no signs of slowing, heaping more misery onto motorists" and the wider economy that depends on road transport.

This financial squeeze comes despite coordinated international efforts to temper the market, including a G7 agreement to release 100 million barrels of oil from strategic reserves. To understand why these measures have had little effect on the forecourt, we must break down the complex web of global and local factors driving this price storm.

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The Big Picture: A Perfect Storm for Prices

The record-high prices are not the result of a single issue, but rather a convergence of powerful economic and geopolitical forces. The primary drivers include the war in Ukraine, lingering pandemic effects, and specific vulnerabilities in the diesel supply chain.

The Global Drivers

Several interconnected factors on the world stage have created a volatile and high-priced environment for energy.

• The War in Ukraine: The single largest factor is the ongoing conflict and the subsequent sanctions against Russia. The market is pricing in the risk of major, long-term disruption to supply from Russia, which is the world's third-largest oil producer and a critical supplier of refined products to Europe.

• Post-Pandemic Demand: As global economies reopened, demand for fuel rebounded far more quickly than supply. Airlines, industry, and commuters returned, creating a surge in consumption that producers have struggled to meet.

• OPEC+ Production Limits: The Organization of the Petroleum Exporting Countries and its allies (OPEC+) have been gradually increasing production targets but have largely resisted calls for a more aggressive ramp-up to cool prices, citing concerns about future demand and limited spare capacity.

The Diesel Dilemma: A Specific Squeeze

While crude oil prices affect all fuels, diesel is facing a particularly acute supply crunch. This is because Russia is not just a major crude oil exporter; it is a vital supplier of refined diesel fuel directly to the European market.

Before the invasion, Europe imported nearly 150 million barrels of Russian diesel and other distillates annually. Sanctions and a collective "self-sanctioning" by many energy firms have effectively removed a huge portion of this ready-to-use fuel from the market, forcing buyers to scramble for alternative sources that are scarce and more expensive.

Furthermore, diesel is a "middle distillate," a workhorse fuel essential for the global economy. It powers trucks, vans, trains, ships, and agricultural and construction machinery. This industrial demand competes directly with motorists, tightening supply even further.

Sterling's Struggle

A crucial, and often overlooked, factor for UK prices is the strength of the pound. All crude oil and refined products are traded globally in US dollars.

The recent weakness of the pound sterling against the dollar means it costs more for UK wholesalers to purchase the same amount of fuel. A weaker pound effectively imports inflation, adding pence to every litre of fuel before it even reaches the forecourt.

• Currency Impact: As the pound has fallen from over $1.35 earlier in the year to near $1.20, the cost for UK importers to buy a barrel of oil priced in dollars has risen significantly, a cost that is passed directly to the consumer.

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From Crude to Customer: A Breakdown of the Pump Price

Understanding what makes up the final price at the pump reveals why costs are so high and where the pressure points lie.

• Crude Oil Cost: This is the largest component, typically accounting for over 50% of the price. It is dictated by the global market, with Brent Crude, the UK's benchmark, hovering well above $100 a barrel.

• Wholesale & Refining: This covers the cost of turning crude oil into petrol and diesel and the price retailers pay for it. This element is where the diesel-specific supply crunch and the weak pound have the biggest impact.

• Delivery & Retail Margin: This is the cost of transporting fuel to thousands of forecourts and the (typically small) profit margin for the retailer, usually only a few pence per litre.

• Taxation: A significant portion of the price is tax. This includes Fuel Duty, currently fixed at 52.95p per litre after a recent 5p cut, and Value Added Tax (VAT) at 20%, which is charged on the total cost of the fuel and the duty, creating a tax-on-a-tax effect that amplifies price rises.

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The Outlook: No Quick Fix in Sight

The coordinated release of oil from strategic reserves by G7 and International Energy Agency (IEA) members is a short-term measure designed to add supply and calm market nerves. However, it does not solve the underlying structural issues.

The 100 million barrels, while a substantial volume, represents little more than a single day of global oil consumption. It cannot replace the potential long-term loss of Russian supply or instantly build new refinery capacity.

Implications for the UK:

• Persistent Inflation: High fuel costs are a primary driver of inflation. The cost of transporting all goods will remain elevated, feeding through to higher prices on supermarket shelves and in shops. The Bank of England will remain under pressure to combat this with higher interest rates.

• Business Strain: Industries reliant on diesel, such as haulage, logistics, construction, and agriculture, face immense margin pressure. This may lead to business failures, surcharges passed to customers, and delays in projects.

• The Push for Transition: While painful in the short term, sustained high fossil fuel prices will inevitably accelerate the economic case for transitioning to electric vehicles (EVs) for both private and commercial users. However, this is a long-term solution that offers no immediate relief.

For the foreseeable future, UK consumers and businesses should brace for continued volatility and high prices at the pump. The path to lower costs will depend less on temporary supply releases and more on a resolution to the conflict in Ukraine and a fundamental rebalancing of global energy supply and demand.