All ideas.  One day there will be a hydrogen shortage - Oh! there is one now -
you don't say......!

The manufacturers are pandering to the whims of poxy politicians and the Green
brigade.

They might as well talk to the trees for what good it will do.

Hydrogen powered cars will never be viable due to cost and pissing about.  What
happened to the Zeppelin - Wooosh Bang!

Now some bright spark that hasn't read this far down will tell us that it won't
be in the form of a gas but in liquid. Hmmm! Liquid Hydrogen - sound pretty
dangerous - explosive mixture??? They won't allow LPG powered vehicles on the
Channel Trains so what hope would drivers of H powered cars have of leaving the
UK or Europe.

You Yanks wouldn't have that problem as you never go anywhere (sic) that
involves ferries or tunnels to reach another country with your car.

Now jet fueled cars are a real possibility.  Jet fuel is Kerosene or in its
normal cheap form Paraffin and you can easily run cars on paraffin.  Needs a
slightly richer air/fuel mixture and a lower compression ratio but it works
quite well.  the old flat-head Ford V8s used to run quite happily on paraffin in
the 1950s and I knew 2 people that used it to power their V8 flat-head
speedboats (hydroplanes) in the early 1960s.

Don't know how the CO2 emissions would be or if the UK Gov' would levy any fuel
duty/tax on the stuff but -- hey its and idea.

So does Honda. In fact, our Governator has a hydrogen-powered Hummer!
The issue here isn't whether hydrogen fuel cars exist, they do, but if
the infrastructure to support this fuel can be developed. It needs to
be seamless and as easy as buying and pumping gasoline/diesel fuel
today.  At best, its at least a decade away. Good Luck!

Yes they exist, however the hydrogen is difficult and expensive to store
(e.g. in astronomically expensive palladium and the range is poor.  Moreover
you get less power from the same engine from burning it - much more
noticeable than LPG.

So practical it ain't.

OTOH if we can get tokomaks working then it would be a long time before we
ran out of deuterium to power electrolysis to make it.