Not wishing to derail this thread completely, BUT
For those that don't know, this guy Harry is Jeremy Clarksons real life neighbour and like JC, is both a farmer and a car enthusiast, with youtube channels Harrys Farm and Harrys Garage.
Here Harry talks to the boys at JCB with their own new British designed and built Hydrogen engine, and for me puts a totally different perspective on the whole Hydrogen debate: Where the benefits over electric may be - much lighter weight, extending running time, and faster refueling time being three obvious advantages, especially for buses, tractors, earth moving equipment etc where those aspects matter.