Perran Moon

I beg to move, That this House has considered the impact of levels of global tin availability on the economy. Meur ras, Mrs Barker. It is an honour to serve under your chairship once again for such an important debate, not just for the UK’s domestic energy security but for global climate change. We were expecting more numbers when colleagues thought this was a Tinder debate, but when I explained that it was a tin debate, the numbers dropped off slightly. The ill-informed may associate tin with cans, but in fact our cans are made almost exclusively of aluminium and contain no tin. More learned colleagues will know that tin, which is used in virtually every electrical device, is increasingly indispensable in the technologies that underpin modern industries. The digital economy, the green economy and the artificial intelligence economy—tin is foundational to each. However, as with other critical minerals, the overconcentration of processing and supply among a small number of countries a long way from western Europe presents massive economic and geopolitical risks. While debates about critical minerals are often focused on lithium, tungsten, nickel and rare earths, tin is often inexplicably overlooked. I have to declare an interest, not only as an officer of the all-party parliamentary group on critical minerals but as the MP for the constituency of the last tin mine in the country to close in 1998. However, it is not only in Camborne and Redruth that the stirrings of excitement are almost palpable. Every single Cornishman and Cornishwoman across the globe will celebrate the return of an industry that goes way beyond just a job. Cornish tin may invoke something far more visceral and emotional, but before becoming a little starry-eyed about the return of Cornish tin mining, I feel it is incumbent on me to highlight tin’s new practical applications, the strategic case for it and the opportunity that we have in this country to rise to the challenges of global supply constrictions. About half of all tin is used as solder for electronics. It is simply unrivalled in connecting components on circuit boards, enabling electrical conductivity while preventing oxidation. As a result, it is integral to almost every piece of modern technology—every smartphone, laptop, data centre server, semiconductor, telecommunications network and advanced manufacturing system. They all totally rely on tin. Without tin, there are no circuit boards, and without circuit boards, there is no new industrial strategy. The 21st-century growth sectors—those at the global technological cutting edge—are increasingly driving demand for tin skywards. Electric vehicles require up to three times the tin of a combustion engine vehicle. Tin demand for solar panels has trebled over the last five years. Tin is required in 5G infrastructure, emerging battery technologies and renewable energy. Interestingly, tin is increasingly important in the development of AI. AI is often discussed in terms of software and algorithms, and less so the vast physical infrastructure that sits behind it, but from the racks to the power modules and networking switches, tin is essential to the physical architecture. In the fabrication of advanced AI chips, molten tin droplets are struck thousands of times per second by high-powered lasers as part of the extreme ultraviolet lithography process used to manufacture cutting-edge semiconductors. As Governments and companies invest billions in data centres and computational capacity, demand for tin in the UK is soaring. In the growth-driving IS-8 sectors alone, demand is expected to grow at an average of 19%, year on year, until 2035. Between now and then, a cumulative total of more than 27,000 tonnes of tin will be required. Here is the crux of the debate. Although demand is rapidly expanding, huge questions remain about the security and resilience of global supply. Extraction and processing are currently heavily concentrated in six countries: the Democratic Republic of the Congo, China, Indonesia, Myanmar, Bolivia and Peru. Those countries currently supply over 90% of primary production, while China alone refines more than half of global tin. With that comes blindingly obvious risk. We have seen in the strait of Hormuz what happens when a state weaponises its control of a choke point in global supply. The ramifications spread rapidly through entire economies. With tin, the UK is even more exposed to such global shocks because we currently produce none. We have already seen what happens to pricing with localised disruptions over the past few years: Myanmar’s 2023 Wa state mining ban; export licensing issues in Indonesia; and military conflict in the Democratic Republic of the Congo. Because the tin market is relatively small in volume compared with other metals, it is the least traded by volume on the London metal exchange. Those modest disruptions have fuelled massive price increases. In 2025, the tin price surged 40% and has rallied a further 34% this year to date, rising to nearly £40,000 a tonne. Come 2035, there will be an expected shortfall of 85,000 tonnes per year in global supply. I will say that again: come 2035, there is expected to be a shortfall of 85,000 tonnes per year in global supply. The challenge with tin is also one of geology and ethics. Many producing regions are experiencing declining ore grades, often between 0.3% and 0.8%—I will come to it later, but the grade at South Crofty is well over 1%—and that means greater volumes of material must be processed to achieve the same output, which inevitably increases costs. At the same time, there are legitimate concerns about environmental impacts, labour standards and illegal mining activity throughout the global supply chain. I ask the Government to recognise the following. First, tin is fundamental to our advanced economy. Secondly, demand for tin will continue to far outstrip the inherently risky global supply chain. Thirdly, therefore, tin production and processing should be considered of strategic national importance, and an investment case for a tin smelter, based on UK economic security, should be developed as a priority. When it comes to UK critical minerals, we are falling well behind competitor states such as the United States, Canada, France and Australia. The US has announced more than $40 billion in funding for critical minerals projects since 2022, alongside major equity stakes in domestic mines. Our friends and neighbours in the member states of the European Union have committed more than €6 billion to critical mineral projects in this year alone. The UK has committed a tiny fraction of that sum. In that context, I turn back west to Cornwall. For four millennia, Cornwall has supplied tin to Britain and the world. Tin mining is woven into our history, identity and DNA, nowhere more so than in my constituency of Camborne, Redruth and Hayle, where the old engine houses still grace our landscape. Tin is once again one of Cornwall’s greatest opportunities. Anchored by £28 million of National Wealth Fund investment, Cornish Metals is on course to reopen the South Crofty mine that shut 30 years ago. Hopefully, that will be achieved in 2028. South Crofty has the highest grade of unmined tin in the world. It is expected to produce up to 4,700 tonnes annually, equivalent to up to 1.6% of globally mined tin production, which could meet the demand from Britain’s growing IS-8 sectors. That is one mine; there are hundreds of mines across Cornwall with critical minerals. The range of those critical minerals is yet to be defined, but there is an awful lot of exploration going on at the moment. Nationally, this offers an opportunity to strengthen domestic supply resilience, reduce dependence on overseas extraction and support the development of strategic industries. For Cornwall, South Crofty could be transformative. My constituency of Camborne, Redruth and Hayle contains some of the most deprived neighbourhoods in the country. Weekly median wages are £95 less than average, and the number of young people claiming unemployment benefits has risen by 26% this year alone. The opening of South Crofty will directly support hundreds of skilled jobs and thousands more in the wider supply chain. Multiplying that by the number of mines shows the importance of critical minerals to the Cornish economy. If we are serious about good growth being felt in every postcode, we must champion this kind of investment. I have previously raised concerns in the House about the UK’s domestic processing and refining capacity. At present, tin mined in Britain would need to travel to east Asia for processing before returning in a form that British manufacturers can use. That is economically, geostrategically and environmentally dire. What steps will the Government take to strengthen domestic critical minerals supply chains? What progress has been made in implementing the critical minerals strategy? What consideration has been given to supporting domestic processing and refining capacity? Can energy support schemes such as the British industrial competitiveness scheme play a greater role in ensuring that our critical minerals projects remain internationally competitive? I look forward to the Minister’s response.