When it comes to electric vehicles, the UK has long been seen as a laggard, with production capacity trailing behind China and progress lagging behind continental Europe. However, by 2026, this assessment will clearly be outdated. With several battery gigafactories either commencing or nearing production, the UK is on the verge of being able to supply batteries for hundreds of thousands of electric vehicles annually. Based on current calculations, its battery supply potential has even begun to exceed the actual annual output of the UK’s automotive sector in recent years. The question is no longer whether there will be enough batteries, but whether vehicle production capacity can keep pace.
The first pillar is the new gigafactory in Sunderland, expanded by Envision AESC, which is set to begin production around the end of 2025, with an annual capacity nearing 16 GWh. Calculating based on mainstream electric vehicles requiring approximately 60 to 80 kWh batteries each, this single factory could support around 200,000 electric vehicles (the actual figure will depend on vehicle models and battery sizes). More importantly, the power structure it relies on is already highly decarbonized. The UK’s offshore wind power ranks among the best globally, meaning that a battery produced in the UK inherently has a lower carbon footprint, which will translate into substantial competitiveness under Europe’s increasingly stringent lifecycle carbon accounting.
The second pillar is larger in scale and has more structural impact. The gigafactory being constructed by Agratas, a subsidiary of Tata Group, is designed for an annual capacity of approximately 40 GWh and is expected to commence production in 2026 or 2027. Once it enters stable mass production, this factory could theoretically supply batteries for around 250,000 to 300,000 electric vehicles, propelling the UK’s battery supply from a single project to a true scale operation.
The third tier involves medium-sized enterprises and subsequent expansions. New-generation battery manufacturers like Volklec are advancing along a path of initially small-scale production, followed by a move towards higher capacities, with a long-term goal of establishing factories at around the 10 GWh level (dependent on financing and customer orders). While this capacity may not significantly alter the total output, its significance lies in enhancing supply chain flexibility and connecting with the UK’s unique industrial translation capabilities, allowing laboratory results to avoid complete reliance on overseas mass production.
The UK’s battery landscape is also extending upstream and downstream. On the upstream side, Cornish Lithium is spearheading lithium mining and geothermal brine lithium extraction projects in Cornwall, attempting to establish a limited but strategically significant domestic lithium supply. In terms of technology, research teams represented by the University of Cambridge are at the forefront of sodium-ion battery research. Sodium is abundant and inexpensive, and while its energy density remains lower than that of lithium batteries, it offers a viable alternative route for small vehicles and energy storage, reducing dependence on a single chemical system.
Moreover, the UK’s advantages in this industry do not stem from a single segment but rather from a comprehensive combination. The highly decarbonized power structure provides a low-carbon advantage during the production phase; a robust research system ensures a continuous stream of new technologies; and industrialization platforms like the UK Battery Industrialisation Centre push laboratory results towards mass production processes, mitigating commercialization risks. Coupled with a relatively stable and predictable regulatory environment, these factors combine to enable the UK to not necessarily pursue the lowest costs, but to possess resilience in long-term competition.
When combining production capacities, the approximately 15.8 GWh from Sunderland, along with around 40 GWh from the Agratas factory, suggests that the UK could realistically approach an annual production capacity of over 50 GWh by the mid to late 2020s. Based on an average of 70 kWh per vehicle, this corresponds to a theoretical supply capacity of 700,000 electric vehicles or more annually, surpassing the actual annual output of the UK automotive sector in recent years. In terms of quantity, batteries are shifting from being a constraint to becoming a prerequisite.
For this reason, the next steps in policy are quite clear. Currently, UK-manufactured cars exported to the EU still face around a 10% tariff, but this is not an immutable fate; rather, it is a result of ongoing negotiation space. If the UK wishes to truly convert its battery advantages into manufacturing scale, exports, and jobs, there is ample reason to reach a more pragmatic arrangement with the EU as soon as possible. Otherwise, while batteries are already ahead, the entire industry may find itself stuck at the border.
