Britain’s gas system could struggle to keep homes and businesses supplied during the 2030s if a severe cold snap coincided with a major infrastructure failure, according to government analysis.
This has prompted ministers to consider stepping directly into the gas market for the first time.
At the centre of the concern is what officials call a “high stress scenario”, a period of extreme winter demand striking at the same time as an outage at one of the country’s largest pieces of gas infrastructure.
Under that combination, supply could fall short within the next decade, according to the Department for Energy Security and Net Zero’s Gas System in Transition: Security of Supply consultation, which closed to responses in February.
The department is not alone in raising the alarm. In its first annual review of gas resilience, the National Energy System Operator (NESO) found that peak-day demand in the early 2030s could exceed available supply under certain conditions, warning of an “emerging risk to gas supply security” as Britain’s energy system decarbonises.
Three-quarters of consultation respondents backed that assessment, according to the government’s findings, agreeing that homes and businesses could be left without gas during a prolonged cold spell by 2030.
Much of the pressure stems from the steady decline of North Sea production.
Output from the UK Continental Shelf has been falling at around 12 per cent a year, according to figures from the North Sea Transition Authority cited in the consultation, pushing Britain to lean more heavily on Norwegian pipeline gas, imported LNG, and storage to make up the shortfall.
Norway’s own reserves are following a similar downward trajectory, according to the Norwegian Offshore Directorate.
Industry has broadly echoed the government’s concerns rather than disputed them.
National Gas, which operates Britain’s gas transmission network, said its own analysis “concurs” with the findings, pointing to a “potential security of supply margin deficit” in the years ahead and calling for swift, coordinated action from government, regulators and industry.
That view was echoed by trade bodies including Energy UK and Offshore Energies UK, both of which submitted formal responses to the consultation earlier this year, though some in the sector have pushed back on how quickly domestic production should be allowed to decline.
Against that backdrop, energy minister Michael Shanks struck a cautious tone about how far the government might go.
“Any form of government intervention or investment in the gas market would be unprecedented and cannot be a decision we take lightly,” he said.
The remark points to the scale of the decision facing ministers.
Direct financial backing for gas infrastructure, of the kind now under consideration to keep storage sites and pipeline operators viable, would sit awkwardly alongside a wider policy push toward renewables and away from fossil fuel reliance.
Yet the same infrastructure remains essential in the near term, providing backup power during stretches of low wind or sun and heating for millions of homes that have yet to switch to electric alternatives.
No formal decision has been announced, and officials have given no indication of when the government intends to respond.
However, with three-quarters of consultation respondents aligned on the scale of the risk, officials appear to be working from a shared starting point, even as they weigh how, and whether, taxpayer money should be used to shore up a fuel source Britain is otherwise trying to leave behind.
