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UK LNG imports could take on greater importance within the country’s energy strategy as North Sea gas production declines. The Government is reportedly considering investments in new liquefied natural gas import capacity, a possibility that has reignited the debate over energy security, domestic production, and dependence on external supplies.
The discussion is not taking place in a system lacking infrastructure. Great Britain currently has three major LNG terminals, and the Government itself considers the country to have the second-largest LNG import infrastructure capacity in Europe. However, the natural decline of the UK Continental Shelf is gradually changing the balance between domestic production, pipeline gas, and seaborne imports.
The source reported on August 25 that the Government is considering allocating billions of pounds to facilities that would allow LNG imports to increase. The information, originally attributed to The Sunday Times, has drawn criticism from business representatives in Aberdeen, who argue that investment in North Sea resources should be maintained.
UK LNG imports gain importance in the country’s supply
Natural gas continues to hold an important position within the UK energy system. In 2024, it accounted for around 35% of the country’s total energy demand, with applications ranging from heating and industrial processes to power generation.
The supply structure, however, is changing. Official statistics show that UK LNG imports increased by 24% in 2025 compared with the previous year. The United States consolidated its position as the leading LNG supplier, accounting for approximately 76% of these imports and a volume equivalent to 15% of UK gas demand.
Port data provide another indication of this transformation. During 2025, LNG traffic through UK ports increased by 22% to 17 million tonnes, while imports rose by 32%. Milford Haven accounted for approximately 70% of the LNG handled through the country’s ports.
The trend helps explain why regasification infrastructure is becoming increasingly important: as domestic production declines, the system needs to maintain sufficient alternative supply routes to meet demand.
Three terminals connect the country to the global LNG market
The United Kingdom has three main facilities for receiving liquefied natural gas: Grain LNG, on the Isle of Grain, and South Hook LNG and Dragon LNG, both located in Milford Haven, Wales.
The UK system has around 150 million cubic meters per day of LNG import capacity, within a total gas import capacity of approximately 368 million cubic meters per day when connections with Norway and continental Europe are included.
Moreover, efforts to strengthen these facilities did not begin with the current debate. The operators of Grain and South Hook have already developed projects to increase their capacity. The Government had estimated that these expansions could jointly raise the UK’s annual LNG import capacity to approximately 59 billion cubic meters.
There is, therefore, an important distinction between expanding existing infrastructure and building from scratch a strategy exclusively dependent on LNG. The United Kingdom has a diversified network that also includes North Sea production, pipelines from Norway, interconnectors with continental Europe, and storage.
North Sea decline changes the energy equation
The structural factor behind the discussion is the progressive decline in production from the UK Continental Shelf.
The Government itself acknowledges that the UK Continental Shelf will continue to decline naturally and that, over the coming years, sources such as Norwegian gas, LNG, and European interconnectors will need to play an increasingly important role in meeting domestic demand.
This transition explains some of the criticism emerging from Aberdeen. The Aberdeen & Grampian Chamber of Commerce argues that restricting new North Sea offshore projects while the need for imported gas increases could lead to greater dependence on foreign energy supplies.
Within this debate, projects such as Rosebank and Jackdaw have been cited by industry representatives to support the development of domestic resources.
However, the energy issue is broader than a direct comparison between a molecule produced in the North Sea and one imported aboard an LNG carrier. The system must simultaneously consider availability, costs, infrastructure, emissions, security of supply, and the future evolution of demand.
LNG offers flexibility but also exposure to the international market
One of LNG’s main advantages is precisely its flexibility. A regasification terminal can receive cargoes from different producing regions and adjust imports according to market requirements.
The United Kingdom’s recent experience demonstrates this diversification capability. In 2025, the United States was by far the largest source of LNG received by the country, while cargoes also arrived from Norway, Trinidad and Tobago, Algeria, and other markets.
However, this flexibility introduces a variable that differs from domestic production: LNG cargoes participate in an international market where different buyers compete for supply.
Therefore, having terminals with sufficient physical capacity does not necessarily mean that all of that capacity will be used continuously. The UK Government’s own security-of-supply analysis warns that available infrastructure does not guarantee its utilization and that import flows also respond to market conditions and prices.
Gas infrastructure will need to adapt to a new supply mix
The United Kingdom’s real challenge may lie precisely at this point. The decline in North Sea production does not mean that a single source must automatically replace the lost volumes. What is changing is the entire composition of the country’s gas supply.
The country will need to simultaneously manage declining domestic production, connections with Norway, LNG terminals, European interconnectors, storage, and gas demand whose behavior will also depend on the progress of electrification and the energy transition.
There are even challenges within the infrastructure itself. For winter 2025/26, National Gas indicated that the maximum upstream capacities at South Hook and the Isle of Grain could, under certain conditions, exceed the network’s capacity to receive those flows, which is why it was assessing additional system improvements.
This introduces a dimension that goes beyond building new terminals: increasing LNG import capacity also requires ensuring that pipelines, compressor stations, and the transmission network can efficiently move those volumes to consumption centers.
The discussion surrounding UK LNG imports therefore reflects a structural transformation of the British gas system. The North Sea will remain part of the energy equation, but its natural decline requires the country to determine what combination of domestic production, LNG, Norwegian gas, storage, and interconnectors will provide sufficient resilience over the coming decades.
Rather than a simple choice between producing or importing gas, the challenge will be to build a supply architecture capable of maintaining energy security as the UK energy mix progressively changes.
Sources: Pipeline & Gas Journal | National Gas
