UK household gas bills to jump 24% as Ofgem price cap reflects post-Iran-war commodity reality
Ofgem's October cap increase exposes how heavily the UK's gas-dependent power system is exposed to the Iran war's lasting price shock.
UK households face a £221 increase in annual energy costs from October after Ofgem raised the price cap, with gas bills climbing 24% against a roughly 5% rise for electricity, the regulator said on Wednesday (2026-05-27).7
That split reflects the grid's changing composition. Electricity's smaller increase reflects the growing share of renewables on the British grid, but gas-heavy heating still carries the full weight of the commodity shock that followed the Iran war. Ofgem attributed electricity's smaller rise directly to reduced reliance on gas-fired generation.7
UK wholesale natural gas prices rose roughly 75% between late February and 23 March 2026, the House of Commons Library reported, drawing on Financial Times data. The International Monetary Fund has warned that the Middle East conflict is feeding directly into higher prices and weaker growth, with the UK among the most exposed European economies.2,3
The economic drag extends beyond household bills. US inflation climbed above 4% for the first time in three years in May as rising energy costs tied to the Iran war pushed consumer costs higher, with energy prices jumping 23.5% year on year and accounting for roughly 60% of the monthly increase in consumer prices, the Bureau of Labor Statistics reported. Core inflation rose just 0.2% in the month and 2.9% annually, with core commodities prices actually declining 0.1%.8
The UK faces the same pressure through a different channel. Gas sets the marginal price for British power, so the 24% gas hike will feed into electricity tariffs indirectly even as renewables cushion the direct impact. Ofgem's own explanation pointed to reduced reliance on gas-fired generation as the reason electricity's increase stayed below gas's.7
European wholesale gas markets remain under strain. ICE Endex TTF front-month ended 26 August 2026 at €65.63/MWh, down 1.31%, still far above pre-conflict levels.4
Brussels is not expecting relief. Top EU officials said on Friday (2026-05-22) that oil and gas prices are likely to stay elevated through at least the end of 2027, with the Iran war's fallout keeping pressure on inflation and growth. Analysts had earlier warned the record run in European energy prices was not expected to end soon, citing strong commodity and carbon costs alongside low wind output.6,4
The supply picture remains fragile. The IEA estimated in mid-March 2026 that around 20 million barrels of oil per day had been affected by the drop in shipping through the Strait of Hormuz, with Gulf production cut by at least 10 million barrels. Anne-Sophie Corbeau of Columbia University has warned that panic could set in if Qatari exports do not resume, with prices potentially soaring beyond €100 per MWh.2,5
A ceasefire is holding while negotiations continue, but the economic impacts are lasting, Ofgem said. The UK's roughly 24% reliance on wind for power generation offers some insulation on the electricity side, yet the gas-fired system backing it up remains exposed to commodity moves.7,1
The October cap announcement is a lagging indicator. Traders are already pricing winter delivery against depleted storage and unresolved questions about Qatari LNG cargoes. The next Ofgem adjustment in January will capture whatever the autumn brings.5
Renewables have softened the blow so far, but the mechanism linking British gas prices to Asian LNG competition and Middle East shipping lanes is unchanged. The January cap review will show how much of this year's shock has become embedded in energy costs.7,1