Utilligence’s Senior Technical Advisor, Kevin Hann, explores the wider impacts that the conflict in the Middle East has on the UK’s electricity grid.
When engineers discuss the UK power grid, the conversation normally centres on wind farms, grid connections, batteries and the move towards electrification. While we’ve all seen the immediate effects that the Middle East conflict has had on energy prices, there are knock-on effects that will be felt with the design of substations, protection systems and network planning. Current events influence the stability and economics of the UK power grid in ways that aren’t always immediately obvious.
Even though the UK has been steadily reducing its dependence on imported fossil fuels, the effects of geopolitical instability continue to reach our power infrastructure. The connection runs through global fuel markets, energy logistics, supply chains and ultimately the engineering choices we make when designing and operating the network.
How global gas prices impact the UK’s power grid
The UK power grid still relies heavily on gas-fired generation to balance the variability of wind and solar output and, at the time of writing, gas generation is providing over 30% of our electricity. In addition, gas-fired plant frequently sets the marginal price of electricity in the wholesale market, meaning global gas prices directly influence the cost of electricity in the UK. On many days, gas turbines are the marginal generators that determine wholesale electricity prices.
Markets priced in the risk of supply disruption almost immediately, when the conflict began. With the effective closure of the Strait of Hormuz, we are now seeing those risks materialise in real time. Even if the UK imports relatively little gas directly from the region, threats to shipping routes and production facilities increase the scarcity of fuel, and prices rise accordingly. We’re already seeing the impacts at petrol pumps around the world.
Why global supply chains matter for UK power infrastructure
Engineers working on the UK power grid often focus on technical parameters, such as fault levels, protection settings and voltage control. Yet the cost of electricity is often determined by the fuel price of gas turbines running somewhere on the system. When global instability drives up gas prices, it raises the cost of balancing the grid. The technical system may operate exactly as designed, but the economic impact can be substantial. This direct link between global events and UK energy security is often overlooked in technical discussions.
Another critical factor is the logistics of energy supply and global supply chains.
The UK has become increasingly dependent on liquefied natural gas (LNG), particularly during winter periods when demand is high. LNG cargoes arrive from many parts of the world, including the United States, Africa and the Middle East. Tankers carrying these cargoes must travel through some of the most sensitive maritime routes on the planet.
With the Strait of Hormuz now disrupted, those shipping patterns have already changed. Even when supply is not physically interrupted, longer routes, increased insurance costs and delays in delivery tighten global supply. For a country like the UK, which relies on imported gas to meet peak winter demand, these disruptions reduce the margin of security for the National Grid.
The impact isn’t limited to fuel supplies. Power infrastructure itself depends heavily on global manufacturing and shipping. Major equipment such as transformers, switchgear and high-voltage cables already have long delivery times, often measured in years rather than months. This is why we engineer custom layouts to fast-track the delivery of fully equipped, prefabricated substations for complex network upgrades.
Disruptions to shipping routes or wider geopolitical tensions can easily extend these timelines further. For engineers responsible for delivering substations and network upgrades, global instability can significantly impact the practical timescales for building the power infrastructure needed to strengthen the grid, and grid connection dates can be missed, stretching project delivery times even further. This is where specialist HV power engineering expertise becomes critical to managing project risk.
How geopolitics is reshaping UK grid engineering
These global pressures eventually feed directly into engineering decisions.
As energy security becomes a greater concern, governments and system planners accelerate the push towards domestic generation and energy independence. In the UK this has translated into massive investment in offshore wind, solar generation and increasingly in grid-scale battery energy storage systems.
From a technical perspective batteries have traditionally been justified by their ability to provide frequency response and short-term balancing. Increasingly they are also seen as part of a wider strategy to reduce dependence on gas-fired peaking plant, and as the core component of many microgrids and private power networks. When renewable generation fluctuates, batteries can provide rapid response without burning fuel. In doing so, they reduce the exposure of the UK power grid to global fuel price shocks.
Gas generation also plays another role in the system which is less visible outside the engineering community. Large gas turbines are synchronous machines and contribute rotational inertia to the grid. This inertia slows the rate of frequency change when disturbances occur. As the National Grid moves towards greater reliance on renewable and inverter-based generation, maintaining sufficient inertia and frequency stability becomes a more complex engineering challenge. The availability and operation of gas-fired generation therefore influences not only the economics of the system, but also aspects of its dynamic stability. Our team of renewable power experts regularly addresses these challenges in complex connection projects.
This shift has implications for the design and operation of the network. As more renewable generation and energy storage connect to the UK power grid, the behaviour of the network during disturbances changes. Traditional synchronous machines that once dominated the system are gradually being replaced by inverter-based resources. Engineers therefore face the challenge of maintaining stability, fault ride-through capability and adequate system inertia while the generation mix evolves. Detailed power system studies are essential to ensuring National Grid stability during this transition.
Conflicts and geopolitical tensions also raise concerns about the security of energy power infrastructure itself. Modern power systems rely heavily on digital control, communications networks and automated systems. Substations, generation plants and grid control centres are all increasingly interconnected. While this improves efficiency and operational visibility, it also creates new vulnerabilities.
As a result, engineers designing modern energy power infrastructure must now consider cyber security and physical protection as integral parts of system design. Resilience is no longer just about ensuring equipment can withstand electrical faults. It also means ensuring that the systems controlling that equipment are secure and robust against external threats.
Perhaps the most important long-term impact of geopolitical instability is psychological, rather than immediate.
Each time a conflict disrupts energy markets, governments are reminded of the strategic importance of energy security. The response is almost always the same: accelerate the transition towards systems that rely less on imported fuels.
In the UK, this translates into policies that encourage electrification across the economy. Transport is shifting towards electric vehicles, heating is gradually moving towards heat pumps and industries are exploring electrified processes where possible. These changes increase demand for electricity and place additional pressure on the distribution and transmission networks that form the UK power grid.
For engineers working in the sector, this means more substations, stronger networks, more complex system studies and greater emphasis on flexibility services. The National Grid must evolve to support higher loads, more variable generation and increasingly sophisticated control systems. As an ICP contractor with NERS accreditation, Utilligence is helping to deliver this power infrastructure across the UK.
Conclusion
It’s tempting to think of geopolitics as something distant from the day-to-day work of electrical engineering. In practice the connection is direct. Decisions made in energy ministries and conflicts occurring thousands of miles away eventually influence the fuels that power the UK power grid, the investments made in power infrastructure and the technologies engineers must deploy.
The war itself may be geographically distant, but the consequences travel quickly through global energy markets and infrastructure planning. For those responsible for designing and operating the UK power grid, understanding that connection is essential.
Energy security has always been about more than simply generating electricity. It’s about ensuring that the systems we build today remain resilient in a world where the forces shaping energy supply are often far beyond our own borders.
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