The Price of Warmth: How a Hormuz Crisis Reignited Britain's North Sea Oil Dilemma

As crude oil prices surged past $100 a barrel for the first time in four years and heating oil costs spiked 30% year-on-year, 1.7 million UK households relying on oil-fired heating found themselves caught between two crises — one geopolitical, one domestic. The collision of a Middle Eastern conflict with a long-simmering debate over North Sea drilling policy has forced the UK to confront an uncomfortable question: can a nation simultaneously phase out domestic fossil fuel production and protect its most vulnerable citizens from the volatility of global energy markets?

The Spark: Strait of Hormuz and the Oil Price Shock

On 28 February 2026, joint military strikes by the United States and Israel on Iran — including the killing of Iran's supreme leader Ali Khamenei — triggered a chain of events that sent shockwaves through global energy markets [1]. Iran's Islamic Revolutionary Guard Corps responded by effectively shutting down the Strait of Hormuz, the narrow waterway through which roughly 20% of the world's daily oil supply passes [2].

The impact was immediate and severe. Tanker traffic through the strait dropped by approximately 70% within days before falling to near-zero, with over 150 vessels anchoring outside the chokepoint to avoid risk [1]. Brent crude futures surged from around $67 per barrel in late February to above $90 by 6 March, eventually spiking to $126 at their peak before settling around $93 as of 10 March [3][4]. West Texas Intermediate crude, which had been trading below $67 in late February, jumped to above $90 [5].

Source: FRED / U.S. Energy Information Administration

Data as of Mar 4, 2026CSV

For Europe, the consequences extend beyond crude oil. Qatar, which sends virtually all of its LNG exports through the Strait of Hormuz, suspended production and exports, sending UK natural gas prices to a 12-month high — up 13% in a single trading session [6]. Approximately 30% of Europe's jet fuel supply originates from or transits via the strait [2]. JPMorgan has estimated that production cuts could exceed 4 million barrels per day if the strait remains closed [7].

Rural Britain Under Siege

While financial markets absorbed the shock in percentage points and barrel prices, the real-world impact landed hardest on a group often overlooked in energy policy debates: the 1.7 million UK households that rely on heating oil rather than mains gas [8].

Unlike gas and electricity, heating oil prices are not subject to a regulatory price cap. When wholesale markets spike, the cost passes directly through to consumers — often within days. In the week following the Hormuz disruption, heating oil prices surged by up to £100 per delivery [9]. Year-on-year, prices are up 30%, sitting at a 12-month high [6].

The geography of this crisis maps onto some of the UK's most economically vulnerable communities. Households in rural areas had the highest fuel poverty rate at 15.9% in 2022, partly because 56.8% of rural properties are off the gas grid compared to just 9% in urban areas [10]. These dwellings are often less energy efficient, with EPC ratings of E and D in hamlets compared to C and D in towns and cities [10]. When overseas conflicts send oil prices soaring, the cost of heating for these families can jump almost overnight, with no cap to cushion the blow.

The situation became urgent enough for the UK's Competition and Markets Authority to issue a warning to heating oil suppliers on 9 March 2026, stating it "won't hesitate to take action" if it suspects consumer or competition law is being broken [9]. The Minister for Energy has directed the CMA to gather evidence on whether consumers are being treated fairly, with the authority empowered to investigate unfair contract terms, misleading practices, or anti-competitive behaviour [9].

The North Sea Paradox

The heating oil crisis has thrown an uncomfortable spotlight on the UK government's North Sea policy. In the autumn 2025 budget, Chancellor Rachel Reeves confirmed a ban on new oil and gas exploration licences — a move hailed by environmental groups as a "historic victory" after nearly three decades of campaigning [11]. The government introduced Transitional Energy Certificates to allow limited production on or near existing fields, but explicitly ruled out new exploration [12].

At the same time, the Energy Profits Levy — the so-called windfall tax — was increased to 38% and extended through March 2030. Combined with the 30% ringfence corporation tax and 10% supplementary charge, North Sea operators now face a headline tax rate of 78% on profits [13].

The policy was designed to accelerate the energy transition. But its critics argue it is accelerating something else entirely: the decline of domestic production precisely when energy security matters most.

UK oil and gas output has already fallen dramatically. Domestic production of crude oil and natural gas liquids dropped to 30.4 million tonnes, consistent with the long-term decline of the mature North Sea basin [14]. Of the roughly 280 active oil and gas fields today, around 180 are expected to cease production by 2030 [14]. The UK currently sources approximately 45% of its natural gas domestically, but that proportion is projected to fall below 25% by 2035 [14]. Net primary oil imports increased by 11.7% in 2024 [14].

Government tax receipts from North Sea operations tell a parallel story of decline: from £9.8 billion in 2022-23 to £4.5 billion in 2024-25, with projections for 2026 showing sub-£3 billion [14].

The Blair Intervention

Into this increasingly polarised debate stepped a familiar figure. On 13 February 2026, the Tony Blair Institute for Global Change published a report that accused the Labour government of "leading the UK in the wrong direction" on energy policy [15]. The former Prime Minister's think tank described the clean power plan as flawed "climate theatre" and called for a reversal of the exploration ban and the scrapping of the Energy Profits Levy [16].

The institute's argument rests on economic projections. It claims that the current policies are leaving 7.5 billion barrels of oil and gas worth £165 billion untapped [15]. Reforming the levy, the report argues, could unlock £50 billion in investment and generate £75 billion in economic value by 2035. The institute identified 111 economically viable projects containing 3.25 billion barrels of reserves — enough, it says, to supply half of the UK's oil and gas demand through 2050 [17].

The intervention was not isolated. In March 2026, eight former UK energy ministers publicly urged the government to reverse its North Sea policy [18]. Industry body Offshore Energies UK (OEUK) published analysis showing that reforming the Energy Profits Levy in 2026 rather than waiting until 2030 could increase tax receipts from £32.9 billion to £48.6 billion over the following decade — a £15.7 billion boost comprising payroll taxes from sustained jobs (£7.5 billion), additional corporation tax (£6.3 billion), and revenue from a new price mechanism (£4.6 billion) [17].

Trade unions GMB and Unite have added their voices, warning about the risk to jobs. The industry has lost roughly a third of its direct workforce since 2014, with estimates of over 200,000 roles reliant on North Sea activity [14]. Without reform, OEUK warns of losses of 1,000 jobs per month and a 40% decline in production by 2030 [17].

The Environmental Counter-argument

Climate campaigners reject the framing entirely. Greenpeace UK, which celebrated the exploration ban as the culmination of decades of activism, argues that new drilling would not reduce consumer bills because North Sea oil and gas is sold on international markets at international prices [11]. Producing more domestically, they contend, would not insulate UK households from the kind of geopolitical shock emanating from the Strait of Hormuz.

The London School of Economics' Grantham Research Institute has echoed this point, noting that additional North Sea output would be "a drop in the ocean" relative to global supply and would not materially affect the international price of oil [19]. They argue that the only long-term solution to energy price volatility is to reduce dependence on fossil fuels altogether — through insulation, heat pumps, and renewable electricity.

A spokesperson for the Department for Energy Security and Net Zero defended the government's position by stating that the clean power mission was "the only way to bring down bills" and that the alternative would "leave Britain dependent on petrostates and dictators" [15].

The Unresolved Tension

The current crisis lays bare a tension at the heart of UK energy policy that no amount of ideological commitment on either side can resolve easily.

On one hand, the climate case for ending North Sea exploration is clear. The International Energy Agency has stated that no new oil and gas fields should be developed if the world is to reach net zero by 2050. The UK, as host of COP26 and a signatory to the Paris Agreement, has international credibility at stake.

On the other hand, the transition is not happening fast enough to protect the people who need protection now. MPs have warned that clean energy jobs are not being created at the pace or scale needed to match North Sea decline [14]. The £20 million budgeted for worker transition has been criticised as woefully insufficient [11]. And the 1.7 million households burning heating oil — many of them elderly, rural, and already in fuel poverty — have no realistic short-term alternative to the fuel that just became dramatically more expensive.

The wholesale gas price impacts from the Hormuz crisis are expected to feed through to the energy price cap effective 1 July 2026 [6], meaning the pain is likely to intensify before it eases. Government support measures, including the Warm Home Discount, are estimated to keep 430,000 households out of fuel poverty — an improvement on 282,000 the previous year, but a fraction of those affected [10].

Source: OEUK / OilPrice.com / DESNZ

Data as of Mar 10, 2026CSV

A poll conducted in January 2026 found that voters broadly support continued North Sea oil and gas production [20], suggesting that the political consensus may be shifting faster than the policy. The question is whether the government can maintain its current course through an energy price shock that makes its consequences viscerally real for millions of households — or whether, as Tony Blair's think tank suggests, the moment demands a strategic recalibration rather than "climate theatre."

What is certain is that the heating oil spike has transformed an abstract policy debate into a kitchen-table crisis. For the families in rural Wales, Scotland, Northern Ireland, and England who watch their heating costs surge with every dispatch from the Middle East, the argument about North Sea drilling is no longer academic. It is the difference between a warm home and a cold one.