The initiative, supported by funding from the Clean Hydrogen Partnership (formerly Fuel Cells and Hydrogen 2 Joint Undertaking), has brought together action in nine European countries. It tested the innovations required to bring hydrogen mobility sector closer to readiness for market. The project successfully performed a large-scale market test of hydrogen refuelling infrastructure, passenger and commercial FCEVs operated in real-world customer applications. It further demonstrated the possible system benefits generated by using electrolytic hydrogen solutions in grid operations. H2ME 2 (2016 – 2023) is the natural successor to the Hydrogen Mobility Europe (H2ME 1) project (2015 – 2020). Taken in conjunction, the H2ME 1 & 2 projects are the most ambitious coordinated hydrogen deployment projects attempted in Europe to date. The deployments intended to test and develop the European hydrogen market and performance of the technology, prove technologies at scale and apply learning to overcome some of the barriers to more widespread application.