This project investigated the decarbonisation supply chain within London’s building and transport sectors to support the city's 2030 net-zero goal. ACE-Research, in collaboration with SE2, mapped skills and supply gaps, focusing on expanding workforce capacity and identifying sustainable growth areas. The report offered recommendations to the Greater London Authority for fostering a localised, skilled workforce essential for scaling decarbonisation. The research also addressed diversity, proposing actions to build a more inclusive supply chain, ensuring the net-zero transition is socially equitable.