The main objective of the SFEM/WG Hydrogen was to perform an analysis of the state of the art of technology and standardization and a gap analysis on the main barriers including challenges and needs. A second objective was to establish contact with key stakeholders from gas sector, grids, electric supply, mobility, the Fuel Cells and Hydrogen Joint Undertaking (FCH JU) to perform the work in the most effective way and to have broad support from the stakeholders for identifying the key challenges. Also the link to EC services, DG JRC, DG RTD, DG ENER, DG GROW was seen as important. The final objective is to set a long term collaborative framework (liaison) with major bodies for strengthening cooperation between regulatory work, standardization work and RDI programs (e.g. European Commission, JRC, FCH2 JU, IEA, ISO, IEC). The scope of the working group covered the production of hydrogen through electrolysis and the transportation, distribution and usage of that hydrogen in pure form or as a natural gas dominant mixture (H2NG). In addition, actions in cross-cutting fields such as safety and training of personnel were identified. These activities will help increase the societal acceptance of hydrogen, key to a successful market uptake.