This data is the Type I and Type II Leontief inverse matrices which is core of the input-output multiplier tool that is employed in the EPRSC funded ‘Hydrogen Fuel Cell Supergen hub’ project: The Economic Impact of Hydrogen and Fuel Cells in the UK to model conceivable impacts on output, wage income, employment and value added (GDP) throughout UK supply chains in scaled scenario analyses. The use of the input-output tool facilitates policy understanding of the supply chain impacts of HFC scenarios. It also permits a preliminary assessment of how well-positioned UK supply chain capacity currently is to capture a share of global activity for hydrogen and fuel cell activity.The central multiplier measure is the output multiplier for any given industry, X,which tells us the amount of output (generally reported in £million) that is generated throughout the economy (across all industries) per £1million of final consumption demand for industry X’s output. What is known as the Type I variant of this multiplier captures (a) the direct effect of the £1million of final demand plus (b) indirect effects in the industry’s up-stream supply chain. The Type II variant also incorporates (c) the additional, induced, impacts of household consumption financed through wage income from employment in industrial production.