The scope of this topic encompasses a techno-economic assessment in addition to pre-normative research activities. There are two main activities to be carried out:1). Pre-normative research on critical issues related to end-use applications and equipment. 2) Techno-economic assessment including analysis of policy options to enable the wide adoption of H2NG blends. The proposed techno-economic assessment and pre-normative research will enable an easier and wider development of injection of hydrogen admixtures into natural gas networks, supporting deployment of hydrogen technologies and contributing to decarbonisation of the European energy system and to European energy security goals.