This conference will take place on the Brussels Expo during the EU Hydrogen Week and marks the final phase of the project. It gathers insights and the latest results on hydrogen injection in gas grids with the aim to be presented to experts and stakeholders in the field of the gas sector and particularly the field of hydrogen integration into the EU gas grids. During the closing event, the main findings, recommendations, and a pathway for higher concentrations of hydrogen in the natural gas transmission grid will be shared.