Martin Cook, Chief Commercial Officer, National Gas Transmission and Metering. Martin joined National Grid in 2000 from Price Waterhouse Coopers, where he had spent 10 years as a management consultant working in the Energy Sector. Martin has had a varied career in National Grid working in both the US and UK businesses. He has led several of National Grid’s non-regulated business units and is currently responsible for all commercial activities in the Gas Transmission and Metering business. The role covers all commercial activities across the business and specifically has responsibility for regulation, hydrogen related developments, business planning and strategy.