The North Sea Debate Risks Missing the Point

The prominence of the North Sea in the current debate risks diverting attention from more consequential priorities. Reducing demand, expanding clean power capacity, reforming electricity markets and upgrading network infrastructure will do more to strengthen energy security than prolonging reliance on a volatile commodity.

The UK’s political debate on energy has become increasingly fixated on new oil and gas exploration in the North Sea. Yet even under more favourable fiscal conditions, it is unclear that such a shift would unlock investment at scale. The issue has taken on a symbolic quality: a proxy for wider arguments about growth, identity and net zero, rather than a credible response to the country’s more immediate challenges, in particularly energy affordability and security.

If the aim is to stabilise prices, improve resilience and reduce emissions, the policy focus lies elsewhere. Cutting gas demand, accelerating grid expansion and scaling clean power deployment are more likely to deliver tangible impact. By comparison, new upstream development offers limited leverage over the outcomes that most concern households and businesses.

Marginal Resilience Improvement, with Little Effect on Affordability

Proponents of further North Sea development, including some within Labour, frame it as essential to security of supply. This is a narrow interpretation. Gas prices in the UK are set in international markets; additional domestic production has little bearing on what consumers ultimately pay. It may marginally influence the origin of supply, but not the price itself, nor the exposure to volatility that has defined recent years. Nor is the emissions case straightforward. The average emissions intensity of UK production remains higher than that of key alternatives, such as Norwegian supply. More importantly, expanding domestic output does little to alter the UK’s overall emissions trajectory if consumption remains unchanged.

The more pertinent question is therefore not where gas is sourced, but the extent to which the UK continues to depend on it. Defining energy security in terms of supply alone risks overlooking the broader strategic objective: reducing exposure to fossil fuels altogether. In the longer term, resilience depends less on securing marginal volumes of domestic production than on lowering structural demand through electrification, renewable generation and efficiency gains.

International trends underline the direction of travel. China is rapidly reducing its exposure to oil and gas through electrification and investment in renewable energy, green technologies and, until recently, coal. Electricity use rose by around 65% between 2015 and 2023, according to Ember, and the vast majority of demand growth is now being met by clean sources. In 2024, roughly 84% of incremental electricity demand was supplied by renewables and nuclear, allowing coal generation to fall even as overall demand increased, a dynamic noted by analyst Lauri Myllyvirta. Geopolitical instability in energy-producing regions is likely to reinforce this shift. The implication for the UK and Europe is clear: competitiveness will increasingly depend on the pace of electrification and access to low-cost clean power. Falling behind this trajectory risks entrenching both economic and energy vulnerabilities, rather than alleviating them.

Declining Output and Long Development Times

It is also worth distinguishing between political signalling and commercial reality. While government can influence the fiscal and regulatory environment, investment decisions ultimately rest with private operators. The UK continental shelf is a mature basin, characterised by declining output, long development timelines and uncertain returns. There is limited evidence that it is currently an attractive destination for large-scale exploration capital.

This context helps explain why recent policy signals from the Treasury are unlikely, in isolation, to trigger a new wave of investment. Measures under discussion, including potential changes to the Energy Profits Levy, may improve the economics of extending existing fields or developing tiebacks. They are less likely to catalyse a significant expansion in new exploration. Investor confidence is also conditioned by wider political uncertainty, including the future direction of energy policy.

Against this backdrop, claims that new drilling could materially reshape the UK’s energy security appear overstated. New projects would take years to reach production and would add relatively modest volumes in a basin already in structural decline. Even under more favourable assumptions, exposure to global fossil fuel markets would remain unchanged. Analysis by Baringa suggests that, under a ‘maximum investment’ case, which would take years to materialise and is contingent on significant fiscal easing and associated reductions in tax revenues for Treasury, the UK would still be reliant on imports for over half of its gas demand in the 2030s.

Managing Decline

Managing this decline remains an important policy challenge, particularly given the implications for employment and regional economies. But this is distinct from presenting new exploration as a central lever for affordability or resilience. Incremental additions to domestic supply are unlikely to alter the underlying dynamics of a system still fundamentally exposed to international gas markets.

None of this implies that oil and gas will disappear in the near term. The UK will continue to rely on them, and domestic production will remain part of the energy mix for some time. The policy challenge is therefore one of management rather than expansion: ensuring an orderly decline while accelerating alternatives.

A more durable approach lies in accelerating decarbonisation as a route to resilience. That implies sustained investment in renewables, faster electrification and a concerted effort to reduce gas consumption across the economy. Over time, the UK’s exposure to external energy shocks will be determined less by where it sources fossil fuels, and more by how far it succeeds in moving beyond them.

© Leila Pourarkin, 2026, published by RUSI with permission of the author.

The views expressed in this Commentary are the author's, and do not represent those of RUSI or any other institution.

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