The UK currently has the capacity to produce approximately 2 GWh/year of batteries, with gigafactories under construction to generate additional 12 GWh/year (planned for operation in 2025) and 67 GWh/year by 2040. But what cell chemistries are needed for the market and why? Liquid or Solid-state; lithium-air or lithium-sulphur? Here, Louis will put forward the case for LMFP Li-ion batteries and present research results from his pilot line activities as part of the Faraday Institution Degradation project.