[Wonder Warthog]

"We should be working on fuel cells as a matter of defence priority."

Where do you get the idea the fuel cells are NOT being worked on?? All the major auto companies are working on them, as are many different US government agencies, including various ones in the DOD.

[RandallFlagg]

I remember when the Humvee first rolled out. They said that the engine could burn gasoline, diesel, kerosene, even perfume or lighter fluid.

[cinFLA]

Use nuclear energy and coal - sources which do not require the Saudis.

Then it is NOT cheap energy as you previously posted.