Hydrogen could be a vital bridge in the transition to renewables, but is there enough investment and commitment at a government level? On Sky News ClimateCast, Tom Heap is at the UK Hydrogen Summit exploring how it could be used, and he is joined by the director of created hydrogen technology company FusionBlu, Fred Davey. Tom also discusses the opportunities and challenges in using hydrogen with Clare Jackson, chief executive of Hydrogen UK, and Michael Liebreich, who provides advisory services and speaks on clean energy. Producers: Soila Apparicio and Emma Rae Woodhouse Editor: Paul Stanworth