Duncan Stone is Deputy Director for Electricity System Flexibility at the Department for Energy Security & Net Zero (DESNZ), which includes responsibility for expanding consumer-led flexibility (CLF), grid-scale battery storage and long duration electricity storage (LDES) capacity as well as energy sector digitalisation. Duncan has worked in government for over twenty years after starting out as a solicitor in a London law firm. Previous roles in government include Deputy Director for Delivery within the smart meter programme, and responsibility for setting up investment frameworks that have resulted in the delivery of significant amounts of new offshore electricity transmission and electricity interconnection investment.