The Annual James Watt Lecture, held in Edinburgh, has long provided a forum for serious reflection on energy, engineering, and society. This year’s lecture was delivered by Professor Ian Arbon, a veteran engineer, industrialist, and academic with more than five decades of experience across manufacturing, sustainability, and energy systems.
The Scottish Energy Forum Annual James Watt Lecture and Dinner took place at the Royal Scot Club in Edinburgh where the Forum was delighted to welcome Professor Ian Arbon. Speaking to a packed audience, Professor Arbon offered not a celebration of current policy trends, but a rigorous, often uncomfortable examination of how far UK energy thinking has drifted from engineering reality.
A Lifetime of Perspective
From the outset, Professor Arbon stressed that his analysis was not driven by party politics or institutional loyalties. Instead, he drew on a career spanning apprenticeships, senior corporate roles, consultancy, and academia. The size and engagement of the audience suggested a genuine appreciation for that depth of experience, something too rarely heard in mainstream policy debates.
Yet the very need for such a lecture underlines how little this kind of grounded, practical insight has influenced policy to date.
His frustration with “vested-interest narratives” was palpable. Energy debates, he argued, are routinely shaped by selective viewpoints that champion favoured technologies while glossing over system-wide impacts. The result is a public discourse that is more marketing exercise than engineering assessment. In contrast, his lecture offered a long-term, system-level view – one rooted in actually making things, running industrial processes, and teaching engineers how real systems behave, rather than how policymakers would like them to behave on paper.
Electricity Is Not Energy – and Policy Still Hasn’t Noticed
A central criticism was the UK’s persistent failure to distinguish between electricity and energy. Political announcements, media stories, and public campaigns obsess over gigawatts of installed capacity, yet rarely address gigawatt-hours delivered or the actual demand that must be met. This is not a minor oversight; it is a basic conceptual error.
Electricity, as Professor Arbon reminded the audience, represents only a portion of total energy use. Heat and transport dominate overall consumption, but they remain peripheral in much of the policy conversation. This distortion has warped national priorities: we set bold electricity targets while leaving the largest components of energy demand inadequately tackled. It is a strategy that looks impressive in headlines and spreadsheets, but fails the test of physical reality.
The Neglected Heat Crisis and the Economics of Waste
The disregard for heat emerged a damning theme. Roughly half of all energy used in the UK is consumed as heat, accounting for around a third of carbon emissions. Yet heat has been consistently treated as an afterthought compared with electricity generation.
Professor Arbon drew attention to the UK’s long-standing habit of throwing away waste heat from power stations, a practice difficult to justify in engineering terms and indefensible in climate terms. Citing the northern European example Denmark, where district heating networks have been developed over decades to capture waste heat from power generation, industry, and now data centres, transforming what we discard into a strategic asset, Professor Arbon suggested the UK’s failure to follow suit is not a trivial oversight; it is a systemic policy failure with long-term consequences for cost, emissions, and resilience.
Policy Detached from Capability
While Professor Arbon recognised the ethical case for decarbonisation and net-zero commitments, he questioned whether current UK strategies are remotely deliverable. The unresolved problems of wind’s intermittency and nuclear’s inflexibility were highlighted, particularly in the near-total absence of credible medium- and long-duration storage solutions. These are not obscure technical quibbles; they are central constraints that current policy routinely waves away.
Equally troubling is the question of capability. After decades of deindustrialisation, the UK faces severe shortages in manufacturing capacity, skilled labour, and robust supply chains. Yet policy continues to be made by announcing targets first and worrying about how to deliver them later. The strong turnout for this lecture suggests that many within the sector recognise this disconnect, and are actively seeking a more realistic conversation.
Beyond Slogans: Confronting Reality or Failing Net Zero
The lecture concluded with a message that cut through the rhetoric: decarbonisation will not be achieved through slogans, creative accounting, or blind faith in future technologies. The most sustainable unit of energy is the one never used, and serious demand reduction must sit at the centre of any honest strategy.
In other words, if the UK continues to ignore basic engineering principles, neglects heat, overstates its capabilities, and clings to politically convenient narratives, it should not be surprised when its climate ambitions collide with reality.
The audience response made one thing clear: there is real value and real demand for voices like Professor Arbon’s.
His lecture did not simply challenge current thinking, it exposed just how far that thinking has drifted from the hard constraints of physics, infrastructure, and industry.