Last year, eleven gas infrastructure companies published a vision of a European Hydrogen Backbone (EHB), a dedicated hydrogen pipeline transport network spanning ten European countries. That report sparked a debate on the role that a hydrogen network can play in the future European energy system. The role of hydrogen in enabling climate neutrality is widely acknowledged, as is the need for hydrogen pipeline transport. This report presents an updated and extended EHB vision, now involving 23 gas infrastructure companies from 21 countries. It presents updated hydrogen infrastructure maps for 2030, 2035 and 2040 with a dedicated hydrogen pipeline transport network largely based on repurposed existing gas infrastructure.