News this week of planned tests for hydrogen powered trains. 

With new trains come new depots, station enhancement and improvement upgrades to accommodate new rolling stock as well as trackside infrastructure and development. New vehicles are often frequently a prompt for upgrade in existing line infrastructure. So good news for railway passengers and UK infrastructure generally.

However, before we all get too excited, introducing new rolling stock fleet is a complex and lengthy process - especially when new technology is involved. Multiple issues including financing, regulation and franchising still have to be negotiated and it could be some years ahead by the time that first passenger journeys take place.