This project aims to develop single-cell algae optimised for high-efficiency green hydrogen production from cheap, sustainable resources - sunlight and water. The success of this project would be a game changer for industry by dramatically improving light to fuel conversion efficiencies. The expected high-efficiency cells would be a valuable resource for a wide range of other light-driven advanced bio-manufacture applications from high-value biopharmaceuticals (e.g. <10 Hectare scale) through to renewable fuels (e.g. 10-1000 Hectare regional scale). The benefits would include advanced green chemical and biochemical manufacturing, diversified sources for green H2 production, regional development, industry growth, job security and exports.