UK Energy Security at Risk as North Sea Gas Supplies Decline
The United Kingdom faces a critical energy crossroads as domestic gas production from the North Sea continues to diminish, potentially forcing the nation into an over-reliance on liquefied natural gas imports from the United States. According to recent forecasts from energy analysts Wood Mackenzie, the UK could depend on US LNG for over 60% of its total gas supplies by 2035 if current trends persist.
The Summer Supply Illusion
National Gas recently announced that the UK will have sufficient gas supplies to meet summer demand, thanks to reduced household consumption and continued pipeline imports from North Sea fields in the UK and Norway. However, this seasonal relief masks deeper structural challenges. Gas remains essential for the UK's energy mix, accounting for approximately 35% of total energy supply, with domestic consumption representing the largest segment at 37% in 2024.
The transition to renewable energy sources, while progressing, will not eliminate gas demand in the short to medium term. Government data indicates gas demand has remained broadly stable for three consecutive years, and the UK's 35 gigawatts of gas-fired power capacity must be retained as backup under current clean energy plans until at least 2030.
The Environmental and Security Cost of US LNG
Energy economist Sir Dieter Helm of Oxford University emphasizes that while gas will remain part of the UK's energy portfolio for decades, the critical question is how to secure supplies with minimal pollution and cost. Pipeline gas from Norway's modern North Sea platforms produces the lowest emissions, followed by UK North Sea gas. In contrast, LNG—particularly from the US—carries significantly higher carbon intensity due to liquefaction, regasification, and methane emissions from shale gas extraction.
"Recent history highlights the risks of reliance on a single country," Wood Mackenzie notes, referencing geopolitical uncertainties. The US increasingly views energy as a tool of foreign policy, raising concerns about the UK's energy security if it becomes dependent on American LNG.
The Case for Domestic North Sea Production
Advocates for increased North Sea drilling argue that domestic production enhances energy security by reducing dependence on volatile international markets. Pipeline gas delivered directly to the UK network is inherently more secure than transatlantic LNG shipments. Furthermore, the UK could negotiate long-term fixed-price contracts with North Sea producers, stabilizing costs for consumers.
Industry body Offshore Energies UK projects that with pragmatic licensing approaches, LNG reliance could be limited to just 6% by 2035. This contrasts sharply with the forecasted 60% dependence on US LNG under current policies. The approval of projects like the Jackdaw gas field—equivalent to 6% of current domestic production—could help mitigate this trend.
Balancing Transition with Practical Realities
The debate should move beyond the false dichotomy of "renewables versus gas" to focus on sensible procurement during the transition period. Electrification remains the long-term goal, but gas will play a necessary role for the next two decades. As Prime Minister Rishi Sunak recently argued, the UK needs "secure, homegrown energy" to enhance national resilience.
Two clear conclusions emerge: First, accelerate electrification to reduce gas usage and maximize renewable and nuclear energy. Second, avoid becoming an "energy prisoner" of the US by supporting domestic North Sea production, which also benefits tax revenues, trade balances, and employment.
The UK stands at a pivotal moment where strategic energy decisions today will determine its security, environmental impact, and economic stability for decades to come.
